Polishing posts and tags (#11)

* Polishing posts * Parent -> Resource
2026-01-12 03:05:14 +00:00 · 2020-10-16 11:20:10 +02:00
parent 69674f4c95
commit 0110816efb
8 changed files with 224 additions and 120 deletions
--- 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,
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+	0xa9, 0x88, 0x82, 0xc4, 0x05, 0x38, 0x00, 0x84, 0x0b, 0x10, 0xa8, 0x5b, 0x22, 0xa5, 0x75, 0x88,
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+	0xd1, 0xce, 0x6c, 0x76, 0x77, 0x66, 0x12, 0x38, 0xce, 0x72, 0xa1, 0xc4, 0x45, 0x26, 0xa4, 0x92,
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+	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/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
+	}
 }