Merge branch 'master' into chat

2026-01-11 19:04:35 +00:00 · 2020-10-16 10:30:01 +01:00
parent b3a93ce52a 0110816efb
commit 0500dc8004
18 changed files with 950 additions and 146 deletions
--- a/README.md
+++ b/README.md
@@ -8,6 +8,7 @@ Services provides a home for real world examples for using Micro v3.

 - [blog](blog) - A blog app composed as micro services
 - [helloworld](helloworld) - A simple helloworld service
+- [messages](messages) - A service for text messages
 - [test](test) - A set of sample test services for Micro

 ## Usage
--- a/TODO.md
+++ b/TODO.md
@@ -11,4 +11,5 @@ A list of open source services to be created
 - inbox - a simple inbox for mail and private messages
  * messages - store the messages for the inbox
  * notifications - holds updates and alerts
+- notes - a simple note taking service
 - users - manages user accounts and login
--- a/blog/posts/handler/posts.go
+++ b/blog/posts/handler/posts.go
@@ -39,8 +39,8 @@ type Posts struct {
 }

 func (p *Posts) Save(ctx context.Context, req *posts.SaveRequest, rsp *posts.SaveResponse) error {
-	if len(req.Id) == 0 || len(req.Title) == 0 || len(req.Content) == 0 {
-		return errors.BadRequest("posts.save.input-check", "Id, title or content is missing")
+	if len(req.Id) == 0 {
+		return errors.BadRequest("posts.save.input-check", "Id is missing")
 	}

 	// read by post
@@ -71,27 +71,48 @@ func (p *Posts) Save(ctx context.Context, req *posts.SaveRequest, rsp *posts.Sav
 	if err != nil {
 		return errors.InternalServerError("posts.save.unmarshal", "Failed to unmarshal old post: %v", err.Error())
 	}
+
 	post := &Post{
 		ID:              req.Id,
-		Title:           req.Title,
-		Content:         req.Content,
-		Slug:            postSlug,
-		Tags:            req.Tags,
+		Title:           oldPost.Title,
+		Content:         oldPost.Content,
+		Slug:            oldPost.Slug,
+		Tags:            oldPost.Tags,
 		CreateTimestamp: oldPost.CreateTimestamp,
 		UpdateTimestamp: time.Now().Unix(),
 	}
+	if len(req.Title) > 0 {
+		post.Title = req.Title
+		post.Slug = slug.Make(post.Title)
+	}
+	if len(req.Slug) > 0 {
+		post.Slug = req.Slug
+	}
+	if len(req.Content) > 0 {
+		post.Content = req.Content
+	}
+	if len(req.Tags) > 0 {
+		// Handle the special case of deletion
+		if len(req.Tags) == 0 && req.Tags[0] == "" {
+			post.Tags = []string{}
+		} else {
+			post.Tags = req.Tags
+		}
+	}

 	// Check if slug exists
 	recordsBySlug, err := store.Read(fmt.Sprintf("%v:%v", slugPrefix, postSlug))
 	if err != nil && err != store.ErrNotFound {
 		return errors.InternalServerError("posts.save.store-read", "Failed to read post by slug: %v", err.Error())
 	}
-	otherSlugPost := &Post{}
-	err = json.Unmarshal(record.Value, otherSlugPost)
-	if err != nil {
-		return errors.InternalServerError("posts.save.slug-unmarshal", "Error unmarshaling other post with same slug: %v", err.Error())
-	}
-	if len(recordsBySlug) > 0 && oldPost.ID != otherSlugPost.ID {
+	if len(recordsBySlug) > 0 {
+		otherSlugPost := &Post{}
+		err = json.Unmarshal(recordsBySlug[0].Value, otherSlugPost)
+		if oldPost.ID != otherSlugPost.ID {
+			if err != nil {
+				return errors.InternalServerError("posts.save.slug-unmarshal", "Error unmarshaling other post with same slug: %v", err.Error())
+			}
+		}
 		return errors.BadRequest("posts.save.slug-check", "An other post with this slug already exists")
 	}

@@ -135,9 +156,9 @@ func (p *Posts) savePost(ctx context.Context, oldPost, post *Post) error {
 	if oldPost == nil {
 		for _, tagName := range post.Tags {
 			_, err := p.Tags.Add(ctx, &tags.AddRequest{
-				ParentID: post.ID,
-				Type:     tagType,
-				Title:    tagName,
+				ResourceID: post.ID,
+				Type:       tagType,
+				Title:      tagName,
 			})
 			if err != nil {
 				return err
@@ -161,9 +182,9 @@ func (p *Posts) diffTags(ctx context.Context, parentID string, oldTagNames, newT
 		_, stillThere := newTags[i]
 		if !stillThere {
 			_, err := p.Tags.Remove(ctx, &tags.RemoveRequest{
-				ParentID: parentID,
-				Type:     tagType,
-				Title:    i,
+				ResourceID: parentID,
+				Type:       tagType,
+				Title:      i,
 			})
 			if err != nil {
 				logger.Errorf("Error decreasing count for tag '%v' with type '%v' for parent '%v'", i, tagType, parentID)
@@ -174,9 +195,9 @@ func (p *Posts) diffTags(ctx context.Context, parentID string, oldTagNames, newT
 		_, newlyAdded := oldTags[i]
 		if newlyAdded {
 			_, err := p.Tags.Add(ctx, &tags.AddRequest{
-				ParentID: parentID,
-				Type:     tagType,
-				Title:    i,
+				ResourceID: parentID,
+				Type:       tagType,
+				Title:      i,
 			})
 			if err != nil {
 				logger.Errorf("Error increasing count for tag '%v' with type '%v' for parent '%v': %v", i, tagType, parentID, err)
@@ -193,6 +214,10 @@ func (p *Posts) Query(ctx context.Context, req *pb.QueryRequest, rsp *pb.QueryRe
 		key := fmt.Sprintf("%v:%v", slugPrefix, req.Slug)
 		logger.Infof("Reading post by slug: %v", req.Slug)
 		records, err = store.Read("", store.Prefix(key))
+	} else if len(req.Id) > 0 {
+		key := fmt.Sprintf("%v:%v", idPrefix, req.Id)
+		logger.Infof("Reading post by id: %v", req.Id)
+		records, err = store.Read("", store.Prefix(key))
 	} else {
 		key := fmt.Sprintf("%v:", timeStampPrefix)
 		var limit uint
--- a/blog/posts/proto/posts/posts.pb.go
+++ b/blog/posts/proto/posts/posts.pb.go
@@ -115,10 +115,13 @@ func (m *Post) GetTags() []string {
 	return nil
 }

+// Query posts. Acts as a listing when no id or slug provided.
+// Gets a single post by id or slug if any of them provided.
 type QueryRequest struct {
-	Slug                 string   `protobuf:"bytes,1,opt,name=slug,proto3" json:"slug,omitempty"`
-	Offset               int64    `protobuf:"varint,2,opt,name=offset,proto3" json:"offset,omitempty"`
-	Limit                int64    `protobuf:"varint,3,opt,name=limit,proto3" json:"limit,omitempty"`
+	Id                   string   `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
+	Slug                 string   `protobuf:"bytes,2,opt,name=slug,proto3" json:"slug,omitempty"`
+	Offset               int64    `protobuf:"varint,3,opt,name=offset,proto3" json:"offset,omitempty"`
+	Limit                int64    `protobuf:"varint,4,opt,name=limit,proto3" json:"limit,omitempty"`
 	XXX_NoUnkeyedLiteral struct{} `json:"-"`
 	XXX_unrecognized     []byte   `json:"-"`
 	XXX_sizecache        int32    `json:"-"`
@@ -149,6 +152,13 @@ func (m *QueryRequest) XXX_DiscardUnknown() {

 var xxx_messageInfo_QueryRequest proto.InternalMessageInfo

+func (m *QueryRequest) GetId() string {
+	if m != nil {
+		return m.Id
+	}
+	return ""
+}
+
 func (m *QueryRequest) GetSlug() string {
 	if m != nil {
 		return m.Slug
@@ -210,11 +220,13 @@ func (m *QueryResponse) GetPosts() []*Post {
 }

 type SaveRequest struct {
-	Id                   string   `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
-	Title                string   `protobuf:"bytes,2,opt,name=title,proto3" json:"title,omitempty"`
-	Slug                 string   `protobuf:"bytes,3,opt,name=slug,proto3" json:"slug,omitempty"`
-	Content              string   `protobuf:"bytes,4,opt,name=content,proto3" json:"content,omitempty"`
-	Timestamp            int64    `protobuf:"varint,5,opt,name=timestamp,proto3" json:"timestamp,omitempty"`
+	Id        string `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
+	Title     string `protobuf:"bytes,2,opt,name=title,proto3" json:"title,omitempty"`
+	Slug      string `protobuf:"bytes,3,opt,name=slug,proto3" json:"slug,omitempty"`
+	Content   string `protobuf:"bytes,4,opt,name=content,proto3" json:"content,omitempty"`
+	Timestamp int64  `protobuf:"varint,5,opt,name=timestamp,proto3" json:"timestamp,omitempty"`
+	// When updating a post and wanting to delete all tags,
+	// send a list of tags with only one member being an empty string [""]
 	Tags                 []string `protobuf:"bytes,6,rep,name=tags,proto3" json:"tags,omitempty"`
 	XXX_NoUnkeyedLiteral struct{} `json:"-"`
 	XXX_unrecognized     []byte   `json:"-"`
@@ -412,28 +424,28 @@ func init() {
 }

 var fileDescriptor_a1e4efc789192621 = []byte{
-	// 363 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xb4, 0x52, 0x5d, 0x4e, 0xf3, 0x30,
+	// 365 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xac, 0x52, 0x5d, 0x4e, 0xf3, 0x30,
 	0x10, 0xfc, 0xd2, 0xfc, 0xf4, 0xeb, 0xf6, 0x47, 0x68, 0x5b, 0xc0, 0xaa, 0x10, 0x94, 0x3c, 0xf5,
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-	0x0e, 0x12, 0xe7, 0xe0, 0x14, 0x5c, 0x81, 0xd3, 0x61, 0xaf, 0xed, 0x92, 0x56, 0xe2, 0x91, 0x97,
-	0x68, 0x67, 0x36, 0x1e, 0xcf, 0x4c, 0x02, 0xa7, 0x65, 0x55, 0xc8, 0xe2, 0xaa, 0x2c, 0x84, 0x14,
-	0xe6, 0x39, 0x23, 0x06, 0x43, 0x02, 0xf1, 0x97, 0x07, 0xc1, 0x42, 0x4d, 0x38, 0x80, 0x56, 0xb6,
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-	0x06, 0x20, 0x42, 0x20, 0xf2, 0x7a, 0xcd, 0x7c, 0x22, 0x69, 0x46, 0x06, 0xed, 0xe7, 0x62, 0x2b,
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-	0x35, 0xdc, 0x29, 0xbd, 0x62, 0xb5, 0x12, 0x5c, 0x52, 0x10, 0x3f, 0xb1, 0x48, 0xe7, 0xcb, 0xb3,
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-	0x4b, 0x30, 0x45, 0x29, 0x4d, 0x7f, 0xda, 0x9d, 0x77, 0x67, 0xa6, 0x43, 0x5d, 0x59, 0x62, 0x2b,
-	0xfc, 0xf0, 0xa0, 0xfb, 0x98, 0xbe, 0x71, 0xe7, 0xe2, 0x2f, 0x9a, 0x3c, 0x83, 0x8e, 0xcc, 0x36,
-	0x4a, 0x3d, 0xdd, 0x94, 0xb6, 0xcb, 0x1f, 0x62, 0xd7, 0x4d, 0xd4, 0xe8, 0xe6, 0x1c, 0x7a, 0xc6,
-	0x94, 0x0d, 0x72, 0xe0, 0x2a, 0xbe, 0x80, 0xfe, 0x3d, 0xcf, 0xb9, 0xfc, 0xcd, 0x76, 0x7c, 0x04,
-	0x03, 0xf7, 0x82, 0x91, 0x98, 0x7f, 0x7a, 0x10, 0xea, 0xe0, 0x02, 0x6f, 0x21, 0xa4, 0x9a, 0x70,
-	0x68, 0xfb, 0x68, 0x7e, 0x86, 0xf1, 0x68, 0x9f, 0x34, 0xa7, 0xe3, 0x7f, 0x78, 0x0d, 0x81, 0xb6,
-	0x84, 0x68, 0xf7, 0x8d, 0xd2, 0xc6, 0xc3, 0x3d, 0x6e, 0x77, 0xe4, 0x0e, 0x22, 0x63, 0x02, 0x9d,
-	0xe8, 0x9e, 0xe9, 0xf1, 0xf1, 0x01, 0xeb, 0x0e, 0x3e, 0x45, 0xf4, 0x97, 0xdf, 0x7c, 0x07, 0x00,
-	0x00, 0xff, 0xff, 0xed, 0x03, 0x8f, 0x37, 0x00, 0x03, 0x00, 0x00,
+	0xa9, 0x88, 0x82, 0xc4, 0x05, 0x38, 0x00, 0x84, 0x0b, 0x10, 0xa8, 0x5b, 0x22, 0xa5, 0x75, 0x88,
+	0x1d, 0x24, 0xce, 0xc1, 0x29, 0xb8, 0x02, 0xa7, 0x23, 0x5e, 0x3b, 0x25, 0xa9, 0xe8, 0x1b, 0x2f,
+	0xd1, 0xce, 0x6c, 0x76, 0x77, 0x66, 0x12, 0x38, 0xce, 0x72, 0xa1, 0xc4, 0x45, 0x26, 0xa4, 0x92,
+	0xe6, 0x39, 0x23, 0x06, 0x7d, 0x02, 0xe1, 0x97, 0x03, 0xde, 0x5d, 0x59, 0xe1, 0x00, 0x5a, 0xc9,
+	0x82, 0x39, 0x13, 0x67, 0xda, 0x89, 0xca, 0x0a, 0x47, 0xe0, 0xab, 0x44, 0xa5, 0x9c, 0xb5, 0x88,
+	0x32, 0x00, 0x11, 0x3c, 0x99, 0x16, 0x2b, 0xe6, 0x12, 0x49, 0x35, 0x32, 0x68, 0x3f, 0x8b, 0x8d,
+	0xe2, 0x1b, 0xc5, 0x3c, 0xa2, 0x2b, 0x48, 0x9d, 0x9c, 0xc7, 0x8a, 0x2f, 0x98, 0x5f, 0x76, 0xdc,
+	0xa8, 0x82, 0xba, 0x53, 0x64, 0x0b, 0xea, 0x04, 0xa6, 0x63, 0x21, 0x1e, 0x41, 0x10, 0x17, 0xea,
+	0x45, 0xe4, 0xac, 0x4d, 0xcb, 0x2c, 0xd2, 0x97, 0x55, 0xbc, 0x92, 0xec, 0xff, 0xc4, 0xd5, 0x97,
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+	0xc7, 0x73, 0x30, 0xc1, 0x95, 0x57, 0xdc, 0x69, 0x77, 0xde, 0x9d, 0x99, 0x4c, 0x75, 0x84, 0x91,
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+	0x7a, 0x46, 0x94, 0x35, 0xb2, 0xa3, 0x2a, 0x3c, 0x83, 0xfe, 0x2d, 0x4f, 0xb9, 0xda, 0x27, 0x3b,
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+	0x31, 0xe1, 0xd0, 0xe6, 0x51, 0xff, 0x2c, 0xe3, 0x51, 0x93, 0x34, 0xd3, 0xe1, 0x3f, 0xbc, 0x04,
+	0x4f, 0x4b, 0x42, 0xb4, 0xfd, 0x5a, 0x68, 0xe3, 0x61, 0x83, 0xdb, 0x8e, 0xdc, 0x40, 0x60, 0x44,
+	0x60, 0xb5, 0xb4, 0x21, 0x7a, 0x7c, 0xb8, 0xc3, 0x56, 0x83, 0x4f, 0x01, 0xfd, 0xf5, 0x57, 0xdf,
+	0x01, 0x00, 0x00, 0xff, 0xff, 0x05, 0x88, 0xa9, 0x15, 0x10, 0x03, 0x00, 0x00,
 }
--- a/blog/posts/proto/posts/posts.proto
+++ b/blog/posts/proto/posts/posts.proto
@@ -20,10 +20,14 @@ message Post {
 	repeated string tags = 8;
 }

+// Query posts. Acts as a listing when no id or slug provided.
+// Gets a single post by id or slug if any of them provided.
 message QueryRequest {
-	string slug = 1;
-	int64 offset = 2;
-	int64 limit = 3;
+	string id = 1;
+	string slug = 2;
+	string tag = 3;
+	int64 offset = 4;
+	int64 limit = 5;
 }

 message QueryResponse {
@@ -36,6 +40,8 @@ message SaveRequest {
 	string slug = 3;
 	string content = 4;
 	int64 timestamp = 5;
+	// When updating a post and wanting to delete all tags,
+	// send a list of tags with only one member being an empty string [""]
 	repeated string tags = 6;
 }

--- a/blog/tags/handler/tags.go
+++ b/blog/tags/handler/tags.go
@@ -15,9 +15,10 @@ import (

 const (
 	slugPrefix     = "bySlug"
-	parentPrefix   = "byParent"
+	resourcePrefix = "byResource"
 	typePrefix     = "byType"
 	tagCountPrefix = "tagCount"
+	childrenByTag  = "childrenByTag"
 )

 type Tag struct {
@@ -30,14 +31,14 @@ type Tag struct {
 type Tags struct{}

 func (t *Tags) Add(ctx context.Context, req *pb.AddRequest, rsp *pb.AddResponse) error {
-	if len(req.ParentID) == 0 || len(req.Type) == 0 {
-		return errors.BadRequest("tags.increasecount.input-check", "parent id and type is required")
+	if len(req.ResourceID) == 0 || len(req.Type) == 0 {
+		return errors.BadRequest("tags.increasecount.input-check", "resource id and type is required")
 	}

 	tagSlug := slug.Make(req.GetTitle())
 	key := fmt.Sprintf("%v:%v", slugPrefix, tagSlug)

-	// read by parent ID + slug, the record is identical in boths places anyway
+	// read by resource ID + slug, the record is identical in boths places anyway
 	records, err := store.Read(key)
 	if err != nil && err != store.ErrNotFound {
 		return err
@@ -62,7 +63,7 @@ func (t *Tags) Add(ctx context.Context, req *pb.AddRequest, rsp *pb.AddResponse)

 	// increase tag count
 	err = store.Write(&store.Record{
-		Key:   fmt.Sprintf("%v:%v:%v", tagCountPrefix, tag.Slug, req.GetParentID()),
+		Key:   fmt.Sprintf("%v:%v:%v", tagCountPrefix, tag.Slug, req.GetResourceID()),
 		Value: nil,
 	})
 	if err != nil {
@@ -85,7 +86,7 @@ func (t *Tags) Add(ctx context.Context, req *pb.AddRequest, rsp *pb.AddResponse)
 		return err
 	}
 	err = store.Write(&store.Record{
-		Key:   fmt.Sprintf("%v:%v:%v", parentPrefix, req.GetParentID(), tag.Slug),
+		Key:   fmt.Sprintf("%v:%v:%v", resourcePrefix, req.GetResourceID(), tag.Slug),
 		Value: tagJSON,
 	})
 	if err != nil {
@@ -105,7 +106,7 @@ func (t *Tags) saveTag(tag *Tag) error {
 		return err
 	}

-	// write parentId:slug to enable prefix listing based on type
+	// write resourceId:slug to enable prefix listing based on type
 	err = store.Write(&store.Record{
 		Key:   key,
 		Value: bytes,
@@ -120,15 +121,15 @@ func (t *Tags) saveTag(tag *Tag) error {
 }

 func (t *Tags) Remove(ctx context.Context, req *pb.RemoveRequest, rsp *pb.RemoveResponse) error {
-	if len(req.ParentID) == 0 || len(req.Type) == 0 {
-		return errors.BadRequest("tags.decreaseecount.input-check", "parent id and type is required")
+	if len(req.ResourceID) == 0 || len(req.Type) == 0 {
+		return errors.BadRequest("tags.decreaseecount.input-check", "resource id and type is required")
 	}

 	tagSlug := slug.Make(req.GetTitle())
-	parentKey := fmt.Sprintf("%v:%v:%v", parentPrefix, req.GetParentID(), tagSlug)
+	resourceKey := fmt.Sprintf("%v:%v:%v", resourcePrefix, req.GetResourceID(), tagSlug)

-	// read by parent ID + slug, the record is identical in boths places anyway
-	records, err := store.Read(parentKey)
+	// read by resource ID + slug, the record is identical in boths places anyway
+	records, err := store.Read(resourceKey)
 	if err != nil && err != store.ErrNotFound {
 		return err
 	}
@@ -146,7 +147,7 @@ func (t *Tags) Remove(ctx context.Context, req *pb.RemoveRequest, rsp *pb.Remove
 	}

 	// decrease tag count
-	err = store.Delete(fmt.Sprintf("%v:%v:%v", tagCountPrefix, tag.Slug, req.GetParentID()))
+	err = store.Delete(fmt.Sprintf("%v:%v:%v", tagCountPrefix, tag.Slug, req.GetResourceID()))
 	if err != nil {
 		return err
 	}
@@ -163,12 +164,12 @@ func (t *Tags) Remove(ctx context.Context, req *pb.RemoveRequest, rsp *pb.Remove
 func (t *Tags) List(ctx context.Context, req *pb.ListRequest, rsp *pb.ListResponse) error {
 	logger.Info("Received Tags.List request")
 	key := ""
-	if len(req.ParentID) > 0 {
-		key = fmt.Sprintf("%v:%v", parentPrefix, req.ParentID)
+	if len(req.ResourceID) > 0 {
+		key = fmt.Sprintf("%v:%v", resourcePrefix, req.ResourceID)
 	} else if len(req.Type) > 0 {
 		key = fmt.Sprintf("%v:%v", typePrefix, req.Type)
 	} else {
-		return errors.BadRequest("tags.list.input-check", "parent id or type is required")
+		return errors.BadRequest("tags.list.input-check", "resource id or type is required")
 	}

 	records, err := store.Read("", store.Prefix(key))
@@ -200,10 +201,10 @@ func (t *Tags) Update(ctx context.Context, req *pb.UpdateRequest, rsp *pb.Update
 	}

 	tagSlug := slug.Make(req.GetTitle())
-	parentID := fmt.Sprintf("%v:%v", slugPrefix, tagSlug)
+	resourceID := fmt.Sprintf("%v:%v", slugPrefix, tagSlug)

-	// read by parent ID + slug, the record is identical in boths places anyway
-	records, err := store.Read(parentID)
+	// read by resource ID + slug, the record is identical in boths places anyway
+	records, err := store.Read(resourceID)
 	if err != nil {
 		return err
 	}
--- a/blog/tags/proto/tags.pb.go
+++ b/blog/tags/proto/tags.pb.go
@@ -21,7 +21,7 @@ var _ = math.Inf
 const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package

 type Tag struct {
-	// Type is useful for namespacing and listing across parents,
+	// Type is useful for namespacing and listing across resources,
 	// ie. list tags for posts, customers etc.
 	Type                 string   `protobuf:"bytes,1,opt,name=type,proto3" json:"type,omitempty"`
 	Slug                 string   `protobuf:"bytes,2,opt,name=slug,proto3" json:"slug,omitempty"`
@@ -94,9 +94,10 @@ func (m *Tag) GetCount() int64 {
 }

 type AddRequest struct {
-	ParentID             string   `protobuf:"bytes,1,opt,name=parentID,proto3" json:"parentID,omitempty"`
+	ResourceID           string   `protobuf:"bytes,1,opt,name=resourceID,proto3" json:"resourceID,omitempty"`
 	Type                 string   `protobuf:"bytes,2,opt,name=type,proto3" json:"type,omitempty"`
 	Title                string   `protobuf:"bytes,3,opt,name=title,proto3" json:"title,omitempty"`
+	ResourceCreated      int64    `protobuf:"varint,4,opt,name=resourceCreated,proto3" json:"resourceCreated,omitempty"`
 	XXX_NoUnkeyedLiteral struct{} `json:"-"`
 	XXX_unrecognized     []byte   `json:"-"`
 	XXX_sizecache        int32    `json:"-"`
@@ -127,9 +128,9 @@ func (m *AddRequest) XXX_DiscardUnknown() {

 var xxx_messageInfo_AddRequest proto.InternalMessageInfo

-func (m *AddRequest) GetParentID() string {
+func (m *AddRequest) GetResourceID() string {
 	if m != nil {
-		return m.ParentID
+		return m.ResourceID
 	}
 	return ""
 }
@@ -148,6 +149,13 @@ func (m *AddRequest) GetTitle() string {
 	return ""
 }

+func (m *AddRequest) GetResourceCreated() int64 {
+	if m != nil {
+		return m.ResourceCreated
+	}
+	return 0
+}
+
 type AddResponse struct {
 	XXX_NoUnkeyedLiteral struct{} `json:"-"`
 	XXX_unrecognized     []byte   `json:"-"`
@@ -180,7 +188,7 @@ func (m *AddResponse) XXX_DiscardUnknown() {
 var xxx_messageInfo_AddResponse proto.InternalMessageInfo

 type RemoveRequest struct {
-	ParentID             string   `protobuf:"bytes,1,opt,name=parentID,proto3" json:"parentID,omitempty"`
+	ResourceID           string   `protobuf:"bytes,1,opt,name=resourceID,proto3" json:"resourceID,omitempty"`
 	Type                 string   `protobuf:"bytes,2,opt,name=type,proto3" json:"type,omitempty"`
 	Title                string   `protobuf:"bytes,3,opt,name=title,proto3" json:"title,omitempty"`
 	XXX_NoUnkeyedLiteral struct{} `json:"-"`
@@ -213,9 +221,9 @@ func (m *RemoveRequest) XXX_DiscardUnknown() {

 var xxx_messageInfo_RemoveRequest proto.InternalMessageInfo

-func (m *RemoveRequest) GetParentID() string {
+func (m *RemoveRequest) GetResourceID() string {
 	if m != nil {
-		return m.ParentID
+		return m.ResourceID
 	}
 	return ""
 }
@@ -351,10 +359,10 @@ func (m *UpdateResponse) XXX_DiscardUnknown() {

 var xxx_messageInfo_UpdateResponse proto.InternalMessageInfo

-// ListRequest: list either by parent id or type.
+// ListRequest: list either by resource id or type.
 // Optionally filter by min or max count.
 type ListRequest struct {
-	ParentID             string   `protobuf:"bytes,1,opt,name=parentID,proto3" json:"parentID,omitempty"`
+	ResourceID           string   `protobuf:"bytes,1,opt,name=resourceID,proto3" json:"resourceID,omitempty"`
 	Type                 string   `protobuf:"bytes,2,opt,name=type,proto3" json:"type,omitempty"`
 	MinCount             int64    `protobuf:"varint,3,opt,name=minCount,proto3" json:"minCount,omitempty"`
 	MaxCount             int64    `protobuf:"varint,4,opt,name=maxCount,proto3" json:"maxCount,omitempty"`
@@ -388,9 +396,9 @@ func (m *ListRequest) XXX_DiscardUnknown() {

 var xxx_messageInfo_ListRequest proto.InternalMessageInfo

-func (m *ListRequest) GetParentID() string {
+func (m *ListRequest) GetResourceID() string {
 	if m != nil {
-		return m.ParentID
+		return m.ResourceID
 	}
 	return ""
 }
@@ -472,28 +480,29 @@ func init() {
 }

 var fileDescriptor_53c4e9b325a9c45b = []byte{
-	// 357 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xac, 0x53, 0x41, 0x4b, 0xf3, 0x40,
-	0x10, 0x6d, 0xbb, 0x69, 0xf9, 0x3a, 0xf9, 0x2a, 0x75, 0xec, 0x21, 0x04, 0x84, 0x92, 0x53, 0x0f,
-	0xda, 0x42, 0xc5, 0x1f, 0x20, 0x7a, 0x11, 0x3c, 0x05, 0x7b, 0xf2, 0x14, 0x9b, 0xa5, 0x04, 0xda,
-	0x24, 0x76, 0x37, 0xa2, 0xf8, 0x33, 0xfd, 0x43, 0x66, 0x67, 0x37, 0xeb, 0x46, 0x8b, 0x07, 0xf1,
-	0x36, 0xf3, 0x26, 0x3b, 0xef, 0xed, 0x7b, 0x1b, 0x18, 0x97, 0xfb, 0x42, 0x16, 0x0b, 0x99, 0x6c,
-	0xc4, 0x9c, 0x4a, 0xf4, 0x54, 0x1d, 0xbd, 0x01, 0xbb, 0x4f, 0x36, 0x88, 0xe0, 0xc9, 0xd7, 0x92,
-	0x07, 0xdd, 0x69, 0x77, 0x36, 0x8c, 0xa9, 0x56, 0x98, 0xd8, 0x56, 0x9b, 0xa0, 0xa7, 0x31, 0x55,
-	0xe3, 0x04, 0xfa, 0x32, 0x93, 0x5b, 0x1e, 0x30, 0x02, 0x75, 0x83, 0x53, 0xf0, 0x53, 0x2e, 0xd6,
-	0xfb, 0xac, 0x94, 0x59, 0x91, 0x07, 0x1e, 0xcd, 0x5c, 0x48, 0x9d, 0x5b, 0x17, 0x55, 0x2e, 0x83,
-	0x7e, 0x3d, 0x63, 0xb1, 0x6e, 0xa2, 0x18, 0xe0, 0x2a, 0x4d, 0x63, 0xfe, 0x54, 0x71, 0x21, 0x31,
-	0x84, 0x7f, 0x65, 0xb2, 0xe7, 0xb9, 0xbc, 0xbd, 0x31, 0x3a, 0x6c, 0x6f, 0xf5, 0xf5, 0x1c, 0x7d,
-	0x07, 0xb5, 0x44, 0x23, 0xf0, 0x69, 0xa7, 0x28, 0x8b, 0x5c, 0xf0, 0x68, 0x05, 0xa3, 0x98, 0xef,
-	0x8a, 0x67, 0xfe, 0xb7, 0x2c, 0x63, 0x38, 0x6a, 0xd6, 0x1a, 0xa2, 0x07, 0x18, 0xad, 0xca, 0x34,
-	0x91, 0x96, 0xe8, 0x90, 0xa5, 0x76, 0x59, 0xef, 0x07, 0xfb, 0xd8, 0x37, 0xfb, 0x14, 0x5d, 0xb3,
-	0xdc, 0xd0, 0x55, 0xe0, 0xdf, 0x65, 0x42, 0xfe, 0xf6, 0x56, 0xf5, 0xf7, 0xbb, 0x2c, 0xbf, 0xa6,
-	0x48, 0x18, 0x45, 0x62, 0x7b, 0x9a, 0x25, 0x2f, 0x7a, 0xe6, 0x99, 0x99, 0xe9, 0xa3, 0x73, 0xf8,
-	0xaf, 0x69, 0xb5, 0x0c, 0x3c, 0x05, 0x7a, 0x46, 0x35, 0x27, 0x9b, 0xf9, 0xcb, 0xe1, 0x9c, 0xde,
-	0x57, 0xfd, 0xa0, 0x62, 0x82, 0x97, 0xef, 0x5d, 0xf0, 0xea, 0x4e, 0xe0, 0x19, 0xb0, 0x3a, 0x15,
-	0x1c, 0xeb, 0x0f, 0x3e, 0x43, 0x0f, 0x8f, 0x1d, 0xc4, 0x5c, 0xad, 0x83, 0x97, 0x30, 0xd0, 0xee,
-	0xe2, 0x89, 0x1e, 0xb7, 0x22, 0x0c, 0x27, 0x6d, 0xd0, 0x1e, 0x5b, 0x80, 0xa7, 0xc4, 0xa1, 0xd9,
-	0xe9, 0xf8, 0x13, 0xa2, 0x0b, 0xb9, 0x3c, 0xda, 0xd6, 0x86, 0xa7, 0x95, 0x60, 0xc3, 0xf3, 0xc5,
-	0xf9, 0xce, 0xe3, 0x80, 0x7e, 0xa0, 0x8b, 0x8f, 0x00, 0x00, 0x00, 0xff, 0xff, 0xdd, 0x86, 0xfc,
-	0x24, 0x54, 0x03, 0x00, 0x00,
+	// 377 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xac, 0x53, 0x41, 0x4f, 0xf2, 0x40,
+	0x10, 0xa5, 0x6c, 0x21, 0x1f, 0xd3, 0x0f, 0xc5, 0x91, 0x43, 0xd3, 0x44, 0x43, 0x7a, 0xe2, 0xa0,
+	0x90, 0x60, 0xfc, 0x01, 0x06, 0x2f, 0x26, 0x9e, 0x1a, 0x3d, 0x18, 0x4f, 0x95, 0x6e, 0x48, 0x13,
+	0x68, 0x6b, 0x77, 0x6b, 0x24, 0x5e, 0xfc, 0x8f, 0xfe, 0x21, 0xdb, 0xd9, 0x6d, 0x5d, 0x90, 0x78,
+	0xd1, 0xdb, 0xcc, 0x9b, 0xce, 0xbc, 0xb7, 0x6f, 0xa6, 0x30, 0xc8, 0xf2, 0x54, 0xa6, 0x53, 0x19,
+	0x2e, 0xc5, 0x84, 0x42, 0xb4, 0xab, 0xd8, 0x7f, 0x03, 0x76, 0x17, 0x2e, 0x11, 0xc1, 0x96, 0x9b,
+	0x8c, 0xbb, 0xd6, 0xc8, 0x1a, 0xf7, 0x02, 0x8a, 0x2b, 0x4c, 0xac, 0x8a, 0xa5, 0xdb, 0x56, 0x58,
+	0x15, 0xe3, 0x10, 0x3a, 0x32, 0x96, 0x2b, 0xee, 0x32, 0x02, 0x55, 0x82, 0x23, 0x70, 0x22, 0x2e,
+	0x16, 0x79, 0x9c, 0xc9, 0x38, 0x4d, 0x5c, 0x9b, 0x6a, 0x26, 0x54, 0xf5, 0x2d, 0xd2, 0x22, 0x91,
+	0x6e, 0xa7, 0xac, 0xb1, 0x40, 0x25, 0xfe, 0xbb, 0x05, 0x70, 0x15, 0x45, 0x01, 0x7f, 0x2e, 0xb8,
+	0x90, 0x78, 0x0a, 0x90, 0x73, 0x91, 0x16, 0xf9, 0x82, 0xdf, 0x5c, 0x6b, 0x29, 0x06, 0xd2, 0x88,
+	0x6c, 0x1b, 0x22, 0xf7, 0x0b, 0x1a, 0xc3, 0x61, 0xdd, 0x37, 0xcf, 0x79, 0x28, 0x79, 0x44, 0xa2,
+	0x58, 0xb0, 0x0b, 0xfb, 0x7d, 0x70, 0x48, 0x81, 0xc8, 0xd2, 0x44, 0x70, 0xff, 0x01, 0xfa, 0x01,
+	0x5f, 0xa7, 0x2f, 0xfc, 0xcf, 0x35, 0xf9, 0x03, 0x38, 0xa8, 0x47, 0x6b, 0xb2, 0x47, 0xe8, 0xdf,
+	0x67, 0x51, 0x29, 0xa3, 0x26, 0xdb, 0xb7, 0x85, 0x66, 0x58, 0xfb, 0x07, 0xc7, 0xd9, 0x37, 0xc7,
+	0x2b, 0xba, 0x7a, 0xb8, 0xa6, 0xdb, 0x80, 0x73, 0x1b, 0x0b, 0xf9, 0x9b, 0x97, 0x79, 0xf0, 0x6f,
+	0x1d, 0x27, 0x73, 0xda, 0x24, 0x23, 0x43, 0x9b, 0x9c, 0x6a, 0xe1, 0xab, 0xaa, 0xd9, 0xba, 0xa6,
+	0x73, 0xff, 0x1c, 0xfe, 0x2b, 0x6a, 0x25, 0x05, 0x4f, 0x80, 0xae, 0xaf, 0x64, 0x65, 0x63, 0x67,
+	0xd6, 0x9b, 0xd0, 0x59, 0x96, 0x77, 0x18, 0x10, 0x3c, 0xfb, 0xb0, 0xc0, 0x2e, 0x33, 0x81, 0x67,
+	0xc0, 0xca, 0xed, 0xe0, 0x40, 0x7d, 0xf0, 0x75, 0x2a, 0xde, 0x91, 0x81, 0xe8, 0xe7, 0xb5, 0xf0,
+	0x12, 0xba, 0xca, 0x61, 0x3c, 0x56, 0xe5, 0xad, 0x55, 0x7a, 0xc3, 0x6d, 0xb0, 0x69, 0x9b, 0x82,
+	0x5d, 0x89, 0x43, 0x3d, 0xd3, 0xf0, 0xc8, 0x43, 0x13, 0x32, 0x79, 0x94, 0xb5, 0x35, 0xcf, 0xd6,
+	0x16, 0x6b, 0x9e, 0x1d, 0xf7, 0x5b, 0x4f, 0x5d, 0xfa, 0xef, 0x2e, 0x3e, 0x03, 0x00, 0x00, 0xff,
+	0xff, 0x9a, 0x72, 0x97, 0xbb, 0x8b, 0x03, 0x00, 0x00,
 }
--- a/blog/tags/proto/tags.pb.micro.go
+++ b/blog/tags/proto/tags.pb.micro.go
@@ -42,9 +42,9 @@ func NewTagsEndpoints() []*api.Endpoint {
 // Client API for Tags service

 type TagsService interface {
-	// Add a tag to a parent
+	// Add a tag to a resource
 	Add(ctx context.Context, in *AddRequest, opts ...client.CallOption) (*AddResponse, error)
-	// Remove a tag from a parent
+	// Remove a tag from a resource
 	Remove(ctx context.Context, in *RemoveRequest, opts ...client.CallOption) (*RemoveResponse, error)
 	// List tags by
 	List(ctx context.Context, in *ListRequest, opts ...client.CallOption) (*ListResponse, error)
@@ -107,9 +107,9 @@ func (c *tagsService) Update(ctx context.Context, in *UpdateRequest, opts ...cli
 // Server API for Tags service

 type TagsHandler interface {
-	// Add a tag to a parent
+	// Add a tag to a resource
 	Add(context.Context, *AddRequest, *AddResponse) error
-	// Remove a tag from a parent
+	// Remove a tag from a resource
 	Remove(context.Context, *RemoveRequest, *RemoveResponse) error
 	// List tags by
 	List(context.Context, *ListRequest, *ListResponse) error
--- a/blog/tags/proto/tags.proto
+++ b/blog/tags/proto/tags.proto
@@ -3,9 +3,9 @@ syntax = "proto3";
 package tags;

 service Tags {
-	// Add a tag to a parent
+	// Add a tag to a resource
 	rpc Add(AddRequest) returns (AddResponse) {}
-	// Remove a tag from a parent
+	// Remove a tag from a resource
 	rpc Remove(RemoveRequest) returns (RemoveResponse) {}
 	// List tags by
 	rpc List(ListRequest) returns (ListResponse) {}
@@ -14,7 +14,7 @@ service Tags {
 }

 message Tag {
-	// Type is useful for namespacing and listing across parents,
+	// Type is useful for namespacing and listing across resources,
 	// ie. list tags for posts, customers etc.
 	string type = 1;
 	string slug = 2;
@@ -24,15 +24,16 @@ message Tag {
 }

 message AddRequest {
-	string parentID = 1;
+	string resourceID = 1;
 	string type = 2;
 	string title = 3;
+	int64 resourceCreated = 4;
 }

 message AddResponse{}

 message RemoveRequest {
-	string parentID = 1;
+	string resourceID = 1;
 	string type = 2;
 	string title = 3;
 }
@@ -47,10 +48,10 @@ message UpdateRequest {

 message UpdateResponse{}

-// ListRequest: list either by parent id or type.
+// ListRequest: list either by resource id or type.
 // Optionally filter by min or max count.
 message ListRequest{
-	string parentID = 1;
+	string resourceID = 1;
 	string type = 2;
 	int64 minCount = 3;
 	int64 maxCount = 4;
--- a/go.mod
+++ b/go.mod
@@ -6,7 +6,7 @@ require (
 	github.com/golang/protobuf v1.4.2
 	github.com/google/uuid v1.1.2
 	github.com/gosimple/slug v1.9.0
-	github.com/micro/go-micro/v3 v3.0.0-beta.2
+	github.com/micro/go-micro/v3 v3.0.0-beta.3
 	github.com/micro/micro/v3 v3.0.0-beta.6.0.20201015134940-68ac1ddfa568
 	github.com/miekg/dns v1.1.31 // indirect
 	github.com/ulikunitz/xz v0.5.8 // indirect
--- a/go.sum
+++ b/go.sum
@@ -102,15 +102,6 @@ github.com/containerd/fifo v0.0.0-20190226154929-a9fb20d87448/go.mod h1:ODA38xgv
 github.com/containerd/go-runc v0.0.0-20180907222934-5a6d9f37cfa3/go.mod h1:IV7qH3hrUgRmyYrtgEeGWJfWbgcHL9CSRruz2Vqcph0=
 github.com/containerd/ttrpc v0.0.0-20190828154514-0e0f228740de/go.mod h1:PvCDdDGpgqzQIzDW1TphrGLssLDZp2GuS+X5DkEJB8o=
 github.com/containerd/typeurl v0.0.0-20180627222232-a93fcdb778cd/go.mod h1:Cm3kwCdlkCfMSHURc+r6fwoGH6/F1hH3S4sg0rLFWPc=
-github.com/coreos/bbolt v1.3.3/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
-github.com/coreos/etcd v3.3.18+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
-github.com/coreos/go-semver v0.3.0 h1:wkHLiw0WNATZnSG7epLsujiMCgPAc9xhjJ4tgnAxmfM=
-github.com/coreos/go-semver v0.3.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
-github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
-github.com/coreos/go-systemd v0.0.0-20190719114852-fd7a80b32e1f h1:JOrtw2xFKzlg+cbHpyrpLDmnN1HqhBfnX7WDiW7eG2c=
-github.com/coreos/go-systemd v0.0.0-20190719114852-fd7a80b32e1f/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
-github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f h1:lBNOc5arjvs8E5mO2tbpBpLoyyu8B6e44T7hJy6potg=
-github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
 github.com/cpu/goacmedns v0.0.1/go.mod h1:sesf/pNnCYwUevQEQfEwY0Y3DydlQWSGZbaMElOWxok=
 github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
 github.com/cpuguy83/go-md2man/v2 v2.0.0 h1:EoUDS0afbrsXAZ9YQ9jdu/mZ2sXgT1/2yyNng4PGlyM=
@@ -240,7 +231,6 @@ github.com/gorilla/handlers v1.4.2/go.mod h1:Qkdc/uu4tH4g6mTK6auzZ766c4CA0Ng8+o/
 github.com/gorilla/mux v1.6.2/go.mod h1:1lud6UwP+6orDFRuTfBEV8e9/aOM/c4fVVCaMa2zaAs=
 github.com/gorilla/mux v1.7.3 h1:gnP5JzjVOuiZD07fKKToCAOjS0yOpj/qPETTXCCS6hw=
 github.com/gorilla/mux v1.7.3/go.mod h1:1lud6UwP+6orDFRuTfBEV8e9/aOM/c4fVVCaMa2zaAs=
-github.com/gorilla/websocket v1.4.1/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
 github.com/gosimple/slug v1.9.0 h1:r5vDcYrFz9BmfIAMC829un9hq7hKM4cHUrsv36LbEqs=
 github.com/gosimple/slug v1.9.0/go.mod h1:AMZ+sOVe65uByN3kgEyf9WEBKBCSS+dJjMX9x4vDJbg=
 github.com/grpc-ecosystem/go-grpc-middleware v1.1.0/go.mod h1:f5nM7jw/oeRSadq3xCzHAvxcr8HZnzsqU6ILg/0NiiE=
@@ -321,8 +311,8 @@ github.com/mattn/go-runewidth v0.0.7 h1:Ei8KR0497xHyKJPAv59M1dkC+rOZCMBJ+t3fZ+tw
 github.com/mattn/go-runewidth v0.0.7/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
 github.com/mattn/go-tty v0.0.0-20180219170247-931426f7535a/go.mod h1:XPvLUNfbS4fJH25nqRHfWLMa1ONC8Amw+mIA639KxkE=
 github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
-github.com/micro/go-micro/v3 v3.0.0-beta.2 h1:LYaTCdw0T8So1EC74F/5c/8oBGT2L25ogTlk0NGo4CA=
-github.com/micro/go-micro/v3 v3.0.0-beta.2/go.mod h1:8VQzHPkol6RwDYO4vhxJk3irqb2XDz/mM8S6j7QNXjQ=
+github.com/micro/go-micro/v3 v3.0.0-beta.3 h1:4B8UbMg+HRL3Cb7Ly1tIY6c9t0dNjNwEf0Tyh+Jk4zk=
+github.com/micro/go-micro/v3 v3.0.0-beta.3/go.mod h1:DiwYchJ8kCWOZVXMsZwuFcNDAdSCS6aEbYfEni4LvK4=
 github.com/micro/micro/v3 v3.0.0-beta.6.0.20201015134940-68ac1ddfa568 h1:Nz+CWXbuowAMG8GBJYufNCaWoNW0WqN0IohFAdlMGdY=
 github.com/micro/micro/v3 v3.0.0-beta.6.0.20201015134940-68ac1ddfa568/go.mod h1:PK1Fa+RtdIVinOLBPgJQJP5Ov8V0ExXx+ywA80f9TdQ=
 github.com/miekg/dns v1.1.15/go.mod h1:W1PPwlIAgtquWBMBEV9nkV9Cazfe8ScdGz/Lj7v3Nrg=
@@ -335,8 +325,6 @@ github.com/minio/minio-go/v7 v7.0.5/go.mod h1:TA0CQCjJZHM5SJj9IjqR0NmpmQJ6bCbXif
 github.com/minio/sha256-simd v0.1.1/go.mod h1:B5e1o+1/KgNmWrSQK08Y6Z1Vb5pwIktudl0J58iy0KM=
 github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
 github.com/mitchellh/go-vnc v0.0.0-20150629162542-723ed9867aed/go.mod h1:3rdaFaCv4AyBgu5ALFM0+tSuHrBh6v692nyQe3ikrq0=
-github.com/mitchellh/hashstructure v1.0.0 h1:ZkRJX1CyOoTkar7p/mLS5TZU4nJ1Rn/F8u9dGS02Q3Y=
-github.com/mitchellh/hashstructure v1.0.0/go.mod h1:QjSHrPWS+BGUVBYkbTZWEnOh3G1DutKwClXU/ABz6AQ=
 github.com/mitchellh/mapstructure v1.1.2/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
 github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w8PVh93nsPXa1VrQ6jlwL5oN8l14QlcNfg=
@@ -454,7 +442,6 @@ github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
-github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
 github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/syndtr/gocapability v0.0.0-20170704070218-db04d3cc01c8/go.mod h1:hkRG7XYTFWNJGYcbNJQlaLq0fg1yr4J4t/NcTQtrfww=
@@ -500,14 +487,7 @@ go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
-go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
-go.uber.org/atomic v1.5.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
-go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0=
-go.uber.org/multierr v1.3.0/go.mod h1:VgVr7evmIr6uPjLBxg28wmKNXyqE9akIJ5XnfpiKl+4=
 go.uber.org/ratelimit v0.0.0-20180316092928-c15da0234277/go.mod h1:2X8KaoNd1J0lZV+PxJk/5+DGbO/tpwLR1m++a7FnB/Y=
-go.uber.org/tools v0.0.0-20190618225709-2cfd321de3ee/go.mod h1:vJERXedbb3MVM5f9Ejo0C68/HhF8uaILCdgjnY+goOA=
-go.uber.org/zap v1.10.0/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q=
-go.uber.org/zap v1.13.0/go.mod h1:zwrFLgMcdUuIBviXEYEH1YKNaOBnKXsx2IPda5bBwHM=
 golang.org/x/crypto v0.0.0-20180621125126-a49355c7e3f8/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190211182817-74369b46fc67/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
@@ -688,8 +668,6 @@ golang.org/x/tools v0.0.0-20190628153133-6cdbf07be9d0/go.mod h1:/rFqwRUd4F7ZHNgw
 golang.org/x/tools v0.0.0-20190816200558-6889da9d5479/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20190911174233-4f2ddba30aff/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191012152004-8de300cfc20a/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.0.0-20191029041327-9cc4af7d6b2c/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.0.0-20191029190741-b9c20aec41a5/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191113191852-77e3bb0ad9e7/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191115202509-3a792d9c32b2/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
--- a/messages/README.md
+++ b/messages/README.md
@@ -0,0 +1,38 @@
+# Messages Service
+
+The messages service is a simplified service for sending messages, much like email. You can send a message using the CLI:
+```bash
+> micro messages send --to=John --from=Barry --subject=HelloWorld --text="Hello John"
+```
+
+And then list the messages a user has recieved:
+```bash
+> micro messages list --user=John
+{
+	"messages": [
+		{
+			"id": "78efd836-ca51-4163-af43-65985f7c6587",
+			"to": "John",
+			"from": "Barry",
+			"subject": "HelloWorld",
+			"text": "Hello John",
+			"sent_at": "1602777240"
+		}
+	]
+}
+```
+
+Or lookup an individual email by ID:
+```bash
+> micro messages read --id=78efd836-ca51-4163-af43-65985f7c6587
+{
+	"message": {
+		"id": "78efd836-ca51-4163-af43-65985f7c6587",
+		"to": "John",
+		"from": "Barry",
+		"subject": "HelloWorld",
+		"text": "Hello John",
+		"sent_at": "1602777240"
+	}
+}
+```
--- a/messages/handler/handler.go
+++ b/messages/handler/handler.go
@@ -0,0 +1,121 @@
+package handler
+
+import (
+	"context"
+	"encoding/json"
+	"strings"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/micro/micro/v3/service/errors"
+	"github.com/micro/micro/v3/service/store"
+	pb "github.com/micro/services/messages/proto"
+)
+
+const (
+	messagePrefix = "message"
+	joinKey       = "/"
+)
+
+// New returns an initialized messages handler
+func New() pb.MessagesHandler {
+	return new(handler)
+}
+
+type handler struct{}
+
+// Send a message
+func (h *handler) Send(ctx context.Context, req *pb.SendRequest, rsp *pb.SendResponse) error {
+	// validate the request
+	if len(req.To) == 0 {
+		return errors.BadRequest("messages.Send.MissingTo", "Missing to")
+	}
+	if len(req.From) == 0 {
+		return errors.BadRequest("messages.Send.MissingFrom", "Missing from")
+	}
+	if len(req.Text) == 0 {
+		return errors.BadRequest("messages.Send.MissingText", "Missing text")
+	}
+
+	// construct the message and marshal it to json
+	msg := &pb.Message{
+		Id:      uuid.New().String(),
+		To:      req.To,
+		From:    req.From,
+		Subject: req.Subject,
+		Text:    req.Text,
+		SentAt:  time.Now().Unix(),
+	}
+	bytes, err := json.Marshal(msg)
+	if err != nil {
+		return errors.BadRequest("messages.Send.Unknown", "Error encoding message")
+	}
+
+	// write the message to the store under the recipients key
+	key := strings.Join([]string{messagePrefix, req.To, msg.Id}, joinKey)
+	if err := store.Write(&store.Record{Key: key, Value: bytes}); err != nil {
+		return errors.BadRequest("messages.Send.Unknown", "Error writing to the store")
+	}
+
+	// write the message to the store under the id (so it can be looked up without needing to know
+	// the users id)
+	key = strings.Join([]string{messagePrefix, msg.Id}, joinKey)
+	if err := store.Write(&store.Record{Key: key, Value: bytes}); err != nil {
+		return errors.BadRequest("messages.Send.Unknown", "Error writing to the store")
+	}
+
+	return nil
+}
+
+// List messages for a user
+func (h *handler) List(ctx context.Context, req *pb.ListRequest, rsp *pb.ListResponse) error {
+	// validate the request
+	if len(req.User) == 0 {
+		return errors.BadRequest("messages.List.MissingUser", "Missing user")
+	}
+
+	// query the store for any messages sent to the user
+	prefix := strings.Join([]string{messagePrefix, req.User}, joinKey)
+	recs, err := store.Read("", store.Prefix(prefix))
+	if err != nil {
+		return errors.BadRequest("messages.List.Unknown", "Error reading from the store")
+	}
+
+	// serialize the result
+	rsp.Messages = make([]*pb.Message, len(recs))
+	for i, r := range recs {
+		var msg pb.Message
+		if err := json.Unmarshal(r.Value, &msg); err != nil {
+			return errors.BadRequest("messages.List.Unknown", "Error decoding message")
+		}
+		rsp.Messages[i] = &msg
+	}
+
+	return nil
+}
+
+// Read a message
+func (h *handler) Read(ctx context.Context, req *pb.ReadRequest, rsp *pb.ReadResponse) error {
+	// validate the request
+	if len(req.Id) == 0 {
+		return errors.BadRequest("messages.Read.MissingUser", "Missing user")
+	}
+
+	// query the store
+	key := strings.Join([]string{messagePrefix, req.Id}, joinKey)
+	recs, err := store.Read(key)
+	if err == store.ErrNotFound {
+		return errors.NotFound("message.Read.InvalidID", "Message not found with ID")
+	} else if err != nil {
+		return errors.BadRequest("messages.Read.Unknown", "Error reading from the store")
+	}
+
+	// serialize the response
+	var msg pb.Message
+	if err := json.Unmarshal(recs[0].Value, &msg); err != nil {
+		return errors.BadRequest("messages.Read.Unknown", "Error decoding message")
+	}
+	rsp.Message = &msg
+
+	return nil
+}
--- a/messages/proto/messages.pb.go
+++ b/messages/proto/messages.pb.go
@@ -0,0 +1,390 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: github.com/micro/services/messages/proto/messages.proto
+
+package messages
+
+import (
+	fmt "fmt"
+	proto "github.com/golang/protobuf/proto"
+	math "math"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+
+type Message struct {
+	Id                   string   `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
+	To                   string   `protobuf:"bytes,2,opt,name=to,proto3" json:"to,omitempty"`
+	From                 string   `protobuf:"bytes,3,opt,name=from,proto3" json:"from,omitempty"`
+	Subject              string   `protobuf:"bytes,4,opt,name=subject,proto3" json:"subject,omitempty"`
+	Text                 string   `protobuf:"bytes,5,opt,name=text,proto3" json:"text,omitempty"`
+	SentAt               int64    `protobuf:"varint,6,opt,name=sent_at,json=sentAt,proto3" json:"sent_at,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Message) Reset()         { *m = Message{} }
+func (m *Message) String() string { return proto.CompactTextString(m) }
+func (*Message) ProtoMessage()    {}
+func (*Message) Descriptor() ([]byte, []int) {
+	return fileDescriptor_926763a275409928, []int{0}
+}
+
+func (m *Message) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Message.Unmarshal(m, b)
+}
+func (m *Message) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Message.Marshal(b, m, deterministic)
+}
+func (m *Message) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Message.Merge(m, src)
+}
+func (m *Message) XXX_Size() int {
+	return xxx_messageInfo_Message.Size(m)
+}
+func (m *Message) XXX_DiscardUnknown() {
+	xxx_messageInfo_Message.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Message proto.InternalMessageInfo
+
+func (m *Message) GetId() string {
+	if m != nil {
+		return m.Id
+	}
+	return ""
+}
+
+func (m *Message) GetTo() string {
+	if m != nil {
+		return m.To
+	}
+	return ""
+}
+
+func (m *Message) GetFrom() string {
+	if m != nil {
+		return m.From
+	}
+	return ""
+}
+
+func (m *Message) GetSubject() string {
+	if m != nil {
+		return m.Subject
+	}
+	return ""
+}
+
+func (m *Message) GetText() string {
+	if m != nil {
+		return m.Text
+	}
+	return ""
+}
+
+func (m *Message) GetSentAt() int64 {
+	if m != nil {
+		return m.SentAt
+	}
+	return 0
+}
+
+type SendRequest struct {
+	To                   string   `protobuf:"bytes,1,opt,name=to,proto3" json:"to,omitempty"`
+	From                 string   `protobuf:"bytes,2,opt,name=from,proto3" json:"from,omitempty"`
+	Subject              string   `protobuf:"bytes,3,opt,name=subject,proto3" json:"subject,omitempty"`
+	Text                 string   `protobuf:"bytes,4,opt,name=text,proto3" json:"text,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *SendRequest) Reset()         { *m = SendRequest{} }
+func (m *SendRequest) String() string { return proto.CompactTextString(m) }
+func (*SendRequest) ProtoMessage()    {}
+func (*SendRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_926763a275409928, []int{1}
+}
+
+func (m *SendRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_SendRequest.Unmarshal(m, b)
+}
+func (m *SendRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_SendRequest.Marshal(b, m, deterministic)
+}
+func (m *SendRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_SendRequest.Merge(m, src)
+}
+func (m *SendRequest) XXX_Size() int {
+	return xxx_messageInfo_SendRequest.Size(m)
+}
+func (m *SendRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_SendRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_SendRequest proto.InternalMessageInfo
+
+func (m *SendRequest) GetTo() string {
+	if m != nil {
+		return m.To
+	}
+	return ""
+}
+
+func (m *SendRequest) GetFrom() string {
+	if m != nil {
+		return m.From
+	}
+	return ""
+}
+
+func (m *SendRequest) GetSubject() string {
+	if m != nil {
+		return m.Subject
+	}
+	return ""
+}
+
+func (m *SendRequest) GetText() string {
+	if m != nil {
+		return m.Text
+	}
+	return ""
+}
+
+type SendResponse struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *SendResponse) Reset()         { *m = SendResponse{} }
+func (m *SendResponse) String() string { return proto.CompactTextString(m) }
+func (*SendResponse) ProtoMessage()    {}
+func (*SendResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_926763a275409928, []int{2}
+}
+
+func (m *SendResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_SendResponse.Unmarshal(m, b)
+}
+func (m *SendResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_SendResponse.Marshal(b, m, deterministic)
+}
+func (m *SendResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_SendResponse.Merge(m, src)
+}
+func (m *SendResponse) XXX_Size() int {
+	return xxx_messageInfo_SendResponse.Size(m)
+}
+func (m *SendResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_SendResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_SendResponse proto.InternalMessageInfo
+
+type ListRequest struct {
+	User                 string   `protobuf:"bytes,1,opt,name=user,proto3" json:"user,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *ListRequest) Reset()         { *m = ListRequest{} }
+func (m *ListRequest) String() string { return proto.CompactTextString(m) }
+func (*ListRequest) ProtoMessage()    {}
+func (*ListRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_926763a275409928, []int{3}
+}
+
+func (m *ListRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ListRequest.Unmarshal(m, b)
+}
+func (m *ListRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ListRequest.Marshal(b, m, deterministic)
+}
+func (m *ListRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ListRequest.Merge(m, src)
+}
+func (m *ListRequest) XXX_Size() int {
+	return xxx_messageInfo_ListRequest.Size(m)
+}
+func (m *ListRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_ListRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ListRequest proto.InternalMessageInfo
+
+func (m *ListRequest) GetUser() string {
+	if m != nil {
+		return m.User
+	}
+	return ""
+}
+
+type ListResponse struct {
+	Messages             []*Message `protobuf:"bytes,1,rep,name=messages,proto3" json:"messages,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}   `json:"-"`
+	XXX_unrecognized     []byte     `json:"-"`
+	XXX_sizecache        int32      `json:"-"`
+}
+
+func (m *ListResponse) Reset()         { *m = ListResponse{} }
+func (m *ListResponse) String() string { return proto.CompactTextString(m) }
+func (*ListResponse) ProtoMessage()    {}
+func (*ListResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_926763a275409928, []int{4}
+}
+
+func (m *ListResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ListResponse.Unmarshal(m, b)
+}
+func (m *ListResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ListResponse.Marshal(b, m, deterministic)
+}
+func (m *ListResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ListResponse.Merge(m, src)
+}
+func (m *ListResponse) XXX_Size() int {
+	return xxx_messageInfo_ListResponse.Size(m)
+}
+func (m *ListResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_ListResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ListResponse proto.InternalMessageInfo
+
+func (m *ListResponse) GetMessages() []*Message {
+	if m != nil {
+		return m.Messages
+	}
+	return nil
+}
+
+type ReadRequest struct {
+	Id                   string   `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *ReadRequest) Reset()         { *m = ReadRequest{} }
+func (m *ReadRequest) String() string { return proto.CompactTextString(m) }
+func (*ReadRequest) ProtoMessage()    {}
+func (*ReadRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_926763a275409928, []int{5}
+}
+
+func (m *ReadRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ReadRequest.Unmarshal(m, b)
+}
+func (m *ReadRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ReadRequest.Marshal(b, m, deterministic)
+}
+func (m *ReadRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ReadRequest.Merge(m, src)
+}
+func (m *ReadRequest) XXX_Size() int {
+	return xxx_messageInfo_ReadRequest.Size(m)
+}
+func (m *ReadRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_ReadRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ReadRequest proto.InternalMessageInfo
+
+func (m *ReadRequest) GetId() string {
+	if m != nil {
+		return m.Id
+	}
+	return ""
+}
+
+type ReadResponse struct {
+	Message              *Message `protobuf:"bytes,1,opt,name=message,proto3" json:"message,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *ReadResponse) Reset()         { *m = ReadResponse{} }
+func (m *ReadResponse) String() string { return proto.CompactTextString(m) }
+func (*ReadResponse) ProtoMessage()    {}
+func (*ReadResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_926763a275409928, []int{6}
+}
+
+func (m *ReadResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ReadResponse.Unmarshal(m, b)
+}
+func (m *ReadResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ReadResponse.Marshal(b, m, deterministic)
+}
+func (m *ReadResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ReadResponse.Merge(m, src)
+}
+func (m *ReadResponse) XXX_Size() int {
+	return xxx_messageInfo_ReadResponse.Size(m)
+}
+func (m *ReadResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_ReadResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ReadResponse proto.InternalMessageInfo
+
+func (m *ReadResponse) GetMessage() *Message {
+	if m != nil {
+		return m.Message
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*Message)(nil), "messages.Message")
+	proto.RegisterType((*SendRequest)(nil), "messages.SendRequest")
+	proto.RegisterType((*SendResponse)(nil), "messages.SendResponse")
+	proto.RegisterType((*ListRequest)(nil), "messages.ListRequest")
+	proto.RegisterType((*ListResponse)(nil), "messages.ListResponse")
+	proto.RegisterType((*ReadRequest)(nil), "messages.ReadRequest")
+	proto.RegisterType((*ReadResponse)(nil), "messages.ReadResponse")
+}
+
+func init() {
+	proto.RegisterFile("github.com/micro/services/messages/proto/messages.proto", fileDescriptor_926763a275409928)
+}
+
+var fileDescriptor_926763a275409928 = []byte{
+	// 347 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x8c, 0x92, 0xcf, 0x4a, 0xf3, 0x40,
+	0x14, 0xc5, 0x99, 0x64, 0xbe, 0xa6, 0xdf, 0x4d, 0x29, 0x38, 0xa0, 0x0e, 0x82, 0x50, 0xb3, 0x2a,
+	0x88, 0x0d, 0xb6, 0x14, 0x17, 0xc5, 0x85, 0xae, 0x75, 0x13, 0x77, 0x6e, 0x4a, 0x9b, 0x8e, 0x35,
+	0x42, 0x3a, 0x35, 0x77, 0x22, 0x3e, 0x80, 0xef, 0xe3, 0x2b, 0xca, 0xfc, 0x49, 0x3b, 0x6a, 0x16,
+	0xee, 0xee, 0xef, 0xf6, 0x9e, 0x39, 0x3d, 0x87, 0xc0, 0xd5, 0xba, 0x50, 0xcf, 0xf5, 0x72, 0x94,
+	0xcb, 0x32, 0x2d, 0x8b, 0xbc, 0x92, 0x29, 0x8a, 0xea, 0xad, 0xc8, 0x05, 0xa6, 0xa5, 0x40, 0x5c,
+	0xac, 0x05, 0xa6, 0xdb, 0x4a, 0x2a, 0xb9, 0xc3, 0x91, 0x41, 0xd6, 0x6d, 0x38, 0xf9, 0x20, 0x10,
+	0xdd, 0x5b, 0x60, 0x7d, 0x08, 0x8a, 0x15, 0x27, 0x03, 0x32, 0xfc, 0x9f, 0x05, 0xc5, 0x4a, 0xb3,
+	0x92, 0x3c, 0xb0, 0xac, 0x24, 0x63, 0x40, 0x9f, 0x2a, 0x59, 0xf2, 0xd0, 0x6c, 0xcc, 0xcc, 0x38,
+	0x44, 0x58, 0x2f, 0x5f, 0x44, 0xae, 0x38, 0x35, 0xeb, 0x06, 0xf5, 0xb5, 0x12, 0xef, 0x8a, 0xff,
+	0xb3, 0xd7, 0x7a, 0x66, 0xc7, 0x10, 0xa1, 0xd8, 0xa8, 0xf9, 0x42, 0xf1, 0xce, 0x80, 0x0c, 0xc3,
+	0xac, 0xa3, 0xf1, 0x46, 0x25, 0x73, 0x88, 0x1f, 0xc4, 0x66, 0x95, 0x89, 0xd7, 0x5a, 0xa0, 0x72,
+	0xce, 0xe4, 0x97, 0x73, 0xd0, 0xee, 0x1c, 0xb6, 0x3b, 0xd3, 0xbd, 0x73, 0xd2, 0x87, 0x9e, 0x35,
+	0xc0, 0xad, 0xdc, 0xa0, 0x48, 0xce, 0x20, 0xbe, 0x2b, 0x50, 0x35, 0x86, 0x0c, 0x68, 0x8d, 0xa2,
+	0x72, 0x96, 0x66, 0x4e, 0xae, 0xa1, 0x67, 0x4f, 0xac, 0x84, 0x5d, 0xc0, 0xae, 0x36, 0x4e, 0x06,
+	0xe1, 0x30, 0x1e, 0x1f, 0x8c, 0x76, 0xbd, 0xba, 0x0e, 0xb3, 0x7d, 0xb3, 0xa7, 0x10, 0x67, 0x62,
+	0xe1, 0x47, 0xf2, 0xcb, 0x4d, 0x66, 0xd0, 0xb3, 0x3f, 0xbb, 0xd7, 0xcf, 0x21, 0x72, 0x52, 0x73,
+	0xd4, 0xfa, 0x78, 0x73, 0x31, 0xfe, 0x24, 0xd0, 0x75, 0x4b, 0x64, 0x53, 0xa0, 0x3a, 0x1a, 0x3b,
+	0xdc, 0x0b, 0xbc, 0x2e, 0x4f, 0x8e, 0x7e, 0xae, 0x9d, 0xe1, 0x14, 0xa8, 0x8e, 0xe7, 0xcb, 0xbc,
+	0x46, 0x7c, 0xd9, 0xb7, 0x16, 0xa6, 0x40, 0xf5, 0xff, 0xf6, 0x65, 0x5e, 0x4c, 0x5f, 0xe6, 0xc7,
+	0xbb, 0x9d, 0x3c, 0x5e, 0xfe, 0xf5, 0x63, 0x9d, 0x35, 0xb8, 0xec, 0x18, 0x9e, 0x7c, 0x05, 0x00,
+	0x00, 0xff, 0xff, 0x90, 0x20, 0xa1, 0xca, 0xe8, 0x02, 0x00, 0x00,
+}
--- a/messages/proto/messages.pb.micro.go
+++ b/messages/proto/messages.pb.micro.go
@@ -0,0 +1,127 @@
+// Code generated by protoc-gen-micro. DO NOT EDIT.
+// source: github.com/micro/services/messages/proto/messages.proto
+
+package messages
+
+import (
+	fmt "fmt"
+	proto "github.com/golang/protobuf/proto"
+	math "math"
+)
+
+import (
+	context "context"
+	api "github.com/micro/micro/v3/service/api"
+	client "github.com/micro/micro/v3/service/client"
+	server "github.com/micro/micro/v3/service/server"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ api.Endpoint
+var _ context.Context
+var _ client.Option
+var _ server.Option
+
+// Api Endpoints for Messages service
+
+func NewMessagesEndpoints() []*api.Endpoint {
+	return []*api.Endpoint{}
+}
+
+// Client API for Messages service
+
+type MessagesService interface {
+	Send(ctx context.Context, in *SendRequest, opts ...client.CallOption) (*SendResponse, error)
+	List(ctx context.Context, in *ListRequest, opts ...client.CallOption) (*ListResponse, error)
+	Read(ctx context.Context, in *ReadRequest, opts ...client.CallOption) (*ReadResponse, error)
+}
+
+type messagesService struct {
+	c    client.Client
+	name string
+}
+
+func NewMessagesService(name string, c client.Client) MessagesService {
+	return &messagesService{
+		c:    c,
+		name: name,
+	}
+}
+
+func (c *messagesService) Send(ctx context.Context, in *SendRequest, opts ...client.CallOption) (*SendResponse, error) {
+	req := c.c.NewRequest(c.name, "Messages.Send", in)
+	out := new(SendResponse)
+	err := c.c.Call(ctx, req, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *messagesService) List(ctx context.Context, in *ListRequest, opts ...client.CallOption) (*ListResponse, error) {
+	req := c.c.NewRequest(c.name, "Messages.List", in)
+	out := new(ListResponse)
+	err := c.c.Call(ctx, req, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *messagesService) Read(ctx context.Context, in *ReadRequest, opts ...client.CallOption) (*ReadResponse, error) {
+	req := c.c.NewRequest(c.name, "Messages.Read", in)
+	out := new(ReadResponse)
+	err := c.c.Call(ctx, req, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// Server API for Messages service
+
+type MessagesHandler interface {
+	Send(context.Context, *SendRequest, *SendResponse) error
+	List(context.Context, *ListRequest, *ListResponse) error
+	Read(context.Context, *ReadRequest, *ReadResponse) error
+}
+
+func RegisterMessagesHandler(s server.Server, hdlr MessagesHandler, opts ...server.HandlerOption) error {
+	type messages interface {
+		Send(ctx context.Context, in *SendRequest, out *SendResponse) error
+		List(ctx context.Context, in *ListRequest, out *ListResponse) error
+		Read(ctx context.Context, in *ReadRequest, out *ReadResponse) error
+	}
+	type Messages struct {
+		messages
+	}
+	h := &messagesHandler{hdlr}
+	return s.Handle(s.NewHandler(&Messages{h}, opts...))
+}
+
+type messagesHandler struct {
+	MessagesHandler
+}
+
+func (h *messagesHandler) Send(ctx context.Context, in *SendRequest, out *SendResponse) error {
+	return h.MessagesHandler.Send(ctx, in, out)
+}
+
+func (h *messagesHandler) List(ctx context.Context, in *ListRequest, out *ListResponse) error {
+	return h.MessagesHandler.List(ctx, in, out)
+}
+
+func (h *messagesHandler) Read(ctx context.Context, in *ReadRequest, out *ReadResponse) error {
+	return h.MessagesHandler.Read(ctx, in, out)
+}
--- a/messages/proto/messages.proto
+++ b/messages/proto/messages.proto
@@ -0,0 +1,44 @@
+syntax = "proto3";
+
+package messages;
+option go_package = "github.com/micro/services/messages/proto;messages";
+
+service Messages {
+  rpc Send(SendRequest) returns (SendResponse);
+  rpc List(ListRequest) returns (ListResponse);
+  rpc Read(ReadRequest) returns (ReadResponse);
+}
+
+message Message {
+  string id = 1;
+  string to = 2;
+  string from = 3;
+  string subject = 4;
+  string text = 5;
+  int64 sent_at = 6;
+}
+
+message SendRequest {
+  string to = 1;
+  string from = 2;
+  string subject = 3;
+  string text = 4;
+}
+
+message SendResponse {}
+
+message ListRequest {
+  string user = 1;
+}
+
+message ListResponse {
+  repeated Message messages = 1;
+}
+
+message ReadRequest {
+  string id = 1;
+}
+
+message ReadResponse {
+  Message message = 1;
+}
--- a/test/image/test-docker.sh
+++ b/test/image/test-docker.sh
@@ -2,4 +2,4 @@ cp services/test/image/.dockerignore .
 pushd micro
 GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build
 popd
-DOCKER_BUILDKIT=1 docker build -t micro -f test/image/Dockerfile .
+DOCKER_BUILDKIT=1 docker build -t micro -f services/test/image/Dockerfile .
--- a/test/integration/blog/blog_test.go
+++ b/test/integration/blog/blog_test.go
@@ -236,4 +236,54 @@ func testPosts(t *test.T) {
 		t.Fatal(tagsActual.Tags[1], string(outp1), string(outp2))
 		return
 	}
+
+	// test updating fields fields and removing tags
+	outp, err = cmd.Exec("posts", "--id=2", "--title=Hi2", "--tags=a", "save")
+	if err != nil {
+		t.Fatal(string(outp))
+		return
+	}
+
+	outp, err = cmd.Exec("tags", "list", "--type=post-tag")
+	json.Unmarshal(outp, &tagsActual)
+	if len(tagsActual.Tags) == 0 {
+		outp1, _ := cmd.Exec("logs", "tags")
+		t.Fatal(string(append(outp, outp1...)))
+		return
+	}
+	if len(tagsActual.Tags) != 2 {
+		t.Fatal(tagsActual.Tags)
+		return
+	}
+	for _, tag := range tagsActual.Tags {
+		if tag.Title == "b" {
+			if tag.Count != "1" {
+				t.Fatal("Tag b should have a count 1")
+				return
+			}
+		}
+		if tag.Title == "a" {
+			if tag.Count != "2" {
+				t.Fatal("Tag b should have a count 2")
+				return
+			}
+		}
+	}
+
+	outp, err = cmd.Exec("posts", "--id=2", "query")
+	if err != nil {
+		t.Fatal(string(outp))
+		return
+	}
+	json.Unmarshal(outp, &actual)
+	if len(actual.Posts) == 0 {
+		t.Fatal(string(outp))
+		return
+	}
+	if actual.Posts[0].Title != "Hi2" ||
+		actual.Posts[0].Content != "Hi there1" ||
+		actual.Posts[0].Slug != "hi2" || len(actual.Posts[0].Tags) != 1 {
+		t.Fatal(actual)
+		return
+	}
 }