Add upvote/downvote fields to merge request and note API to preserve compatibility

app/models/concerns/issuable.rb

@@ -92,6 +92,16 @@ module Issuable
     opened? || reopened?
   end
 
+  # Deprecated. Still exists to preserve API compatibility.
+  def downvotes
+    0
+  end
+
+  # Deprecated. Still exists to preserve API compatibility.
+  def upvotes
+    0
+  end
+
   def subscribed?(user)
     subscription = subscriptions.find_by_user_id(user.id)
 

app/models/note.rb

@@ -335,6 +335,16 @@ class Note < ActiveRecord::Base
     read_attribute(:system)
   end
 
+  # Deprecated. Still exists to preserve API compatibility.
+  def downvote?
+    false
+  end
+
+  # Deprecated. Still exists to preserve API compatibility.
+  def upvote?
+    false
+  end
+
   def editable?
     !system?
   end

doc/api/merge_requests.md

@@ -4,7 +4,8 @@
 
 Get all merge requests for this project. 
 The `state` parameter can be used to get only merge requests with a given state (`opened`, `closed`, or `merged`) or all of them (`all`).
-The pagination parameters `page` and `per_page` can be used to restrict the list of merge requests.
+The pagination parameters `page` and `per_page` can be used to restrict the list of merge requests. With GitLab 8.2 the return fields `upvotes` and
+`downvotes` are deprecated and always return `0`.
 
 ```
 GET /projects/:id/merge_requests
@@ -31,6 +32,8 @@ Parameters:
     "project_id": 3,
     "title": "test1",
     "state": "opened",
+    "upvotes": 0,
+    "downvotes": 0,
     "author": {
       "id": 1,
       "username": "admin",
@@ -55,7 +58,7 @@ Parameters:
 
 ## Get single MR
 
-Shows information about a single merge request.
+Shows information about a single merge request. With GitLab 8.2 the return fields `upvotes` and `downvotes` are deprecated and always return `0`.
 
 ```
 GET /projects/:id/merge_request/:merge_request_id
@@ -75,6 +78,8 @@ Parameters:
   "project_id": 3,
   "title": "test1",
   "state": "merged",
+  "upvotes": 0,
+  "downvotes": 0,
   "author": {
     "id": 1,
     "username": "admin",
@@ -98,7 +103,9 @@ Parameters:
 
 ## Get single MR changes
 
-Shows information about the merge request including its files and changes
+Shows information about the merge request including its files and changes.
+With GitLab 8.2 the return fields `upvotes` and `downvotes` are deprecated and
+always return `0`.
 
 ```
 GET /projects/:id/merge_request/:merge_request_id/changes
@@ -122,6 +129,8 @@ Parameters:
   "updated_at": "2015-02-02T20:08:49.959Z",
   "target_branch": "secret_token",
   "source_branch": "version-1-9",
+  "upvotes": 0,
+  "downvotes": 0,
   "author": {
     "name": "Chad Hamill",
     "username": "jarrett",
@@ -167,7 +176,8 @@ Parameters:
 
 ## Create MR
 
-Creates a new merge request.
+Creates a new merge request. With GitLab 8.2 the return fields `upvotes` and `
+downvotes` are deprecated and always return `0`.
 
 ```
 POST /projects/:id/merge_requests
@@ -192,6 +202,8 @@ Parameters:
   "project_id": 3,
   "title": "test1",
   "state": "opened",
+  "upvotes": 0,
+  "downvotes": 0,
   "author": {
     "id": 1,
     "username": "admin",
@@ -217,7 +229,8 @@ If an error occurs, an error number and a message explaining the reason is retur
 
 ## Update MR
 
-Updates an existing merge request. You can change the target branch, title, or even close the MR.
+Updates an existing merge request. You can change the target branch, title, or even close the MR. With GitLab 8.2 the return fields `upvotes` and `downvotes`
+are deprecated and always return `0`.
 
 ```
 PUT /projects/:id/merge_request/:merge_request_id
@@ -242,6 +255,8 @@ Parameters:
   "title": "test1",
   "description": "description1",
   "state": "opened",
+  "upvotes": 0,
+  "downvotes": 0,
   "author": {
     "id": 1,
     "username": "admin",
@@ -266,7 +281,8 @@ If an error occurs, an error number and a message explaining the reason is retur
 
 ## Accept MR
 
-Merge changes submitted with MR using this API.
+Merge changes submitted with MR using this API. With GitLab 8.2 the return
+fields `upvotes` and `downvotes` are deprecated and always return `0`.
 
 If merge success you get `200 OK`.
 
@@ -294,6 +310,8 @@ Parameters:
   "project_id": 3,
   "title": "test1",
   "state": "merged",
+  "upvotes": 0,
+  "downvotes": 0,
   "author": {
     "id": 1,
     "username": "admin",

doc/api/notes.md

@@ -6,7 +6,8 @@ Notes are comments on snippets, issues or merge requests.
 
 ### List project issue notes
 
-Gets a list of all notes for a single issue.
+Gets a list of all notes for a single issue. With GitLab 8.2 the return fields
+`upvote` and `downvote` are deprecated and always return `false`.
 
 ```
 GET /projects/:id/issues/:issue_id/notes
@@ -32,7 +33,9 @@ Parameters:
       "created_at": "2013-09-30T13:46:01Z"
     },
     "created_at": "2013-10-02T09:22:45Z",
-    "system": true
+    "system": true,
+    "upvote": false,
+    "downvote": false
   },
   {
     "id": 305,
@@ -47,7 +50,9 @@ Parameters:
       "created_at": "2013-09-30T13:46:01Z"
     },
     "created_at": "2013-10-02T09:56:03Z",
-    "system": false
+    "system": true,
+    "upvote": false,
+    "downvote": false
   }
 ]
 ```

lib/api/entities.rb

@@ -163,6 +163,8 @@ module API
 
     class MergeRequest < ProjectEntity
       expose :target_branch, :source_branch
+      # deprecated, always returns 0
+      expose :upvotes,  :downvotes
       expose :author, :assignee, using: Entities::UserBasic
       expose :source_project_id, :target_project_id
       expose :label_names, as: :labels
@@ -192,6 +194,9 @@ module API
       expose :author, using: Entities::UserBasic
       expose :created_at
       expose :system?, as: :system
+      # upvote? and downvote? are deprecated, always return false
+      expose :upvote?, as: :upvote
+      expose :downvote?, as: :downvote
     end
 
     class MRNote < Grape::Entity