Merge pull request #406 from mattermost/mm-1281

MM-1281 Track channel creator in DB and show in channel intro message

model/channel.go

@@ -28,6 +28,7 @@ type Channel struct {
 	LastPostAt    int64  `json:"last_post_at"`
 	TotalMsgCount int64  `json:"total_msg_count"`
 	ExtraUpdateAt int64  `json:"extra_update_at"`
+	CreatorId     string `json:"creator_id"`
 }
 
 func (o *Channel) ToJson() string {
@@ -92,6 +93,10 @@ func (o *Channel) IsValid() *AppError {
 		return NewAppError("Channel.IsValid", "Invalid description", "id="+o.Id)
 	}
 
+	if len(o.CreatorId) > 26 {
+		return NewAppError("Channel.IsValid", "Invalid creator id", "")
+	}
+
 	return nil
 }