Update V4 API regarding new filtering fields

lib/api/entities.rb

@@ -797,8 +797,21 @@ module API
       expose :id
       expose :name
       expose :project, using: Entities::BasicProjectDetails
+
+      # EE-specific
+      # Default filtering configuration
       expose :milestone,
-             if: -> (board, _) { board.project.feature_available?(:scoped_issue_board) }
+             using: Entities::Milestone,
+             if: -> (board, _) { board.parent.feature_available?(:scoped_issue_board) }
+      expose :assignee,
+             using: Entities::UserBasic,
+             if: -> (board, _) { board.parent.feature_available?(:scoped_issue_board) }
+      expose :labels,
+             using: Entities::LabelBasic,
+             if: -> (board, _) { board.parent.feature_available?(:scoped_issue_board) }
+      expose :weight,
+             if: -> (board, _) { board.parent.feature_available?(:scoped_issue_board) }
+
       expose :lists, using: Entities::List do |board|
         board.lists.destroyable
       end

spec/fixtures/api/schemas/board.json

@@ -18,7 +18,7 @@
         "title": { "type": "string" }
       },
       "additionalProperties": false
-    }
+    },
   },
   "additionalProperties": false
 }

spec/fixtures/api/schemas/public_api/v4/board.json

@@ -3,13 +3,17 @@
   "required" : [
     "id",
     "name",
+    "weight",
     "project",
     "milestone",
+    "assignee",
+    "labels",
     "lists"
   ],
   "properties" : {
     "id": { "type": "integer" },
     "name": { "type": "string" },
+    "weight": { "type": ["string", "null"] },
     "project": {
       "type": "object",
       "required": [
@@ -50,6 +54,13 @@
       },
       "additionalProperties": false
     },
+    "assignee": {
+      "$ref": "user/basic.json"
+    },
+    "labels": {
+      "type": "array",
+      "items": { "$ref": "label/basic.json" }
+    },
     "milestone": {
       "type": ["object", "null"],
       "required": [

spec/fixtures/api/schemas/public_api/v4/label/basic.json

+{
+  "type": "object",
+  "required": ["id", "name", "description"],
+  "properties": {
+    "id": { "type": "integer" },
+    "name": { "type": "string" },
+    "description": { "type": ["string", "null"] }
+  }
+}

spec/requests/api/boards_spec.rb

@@ -29,9 +29,11 @@ describe API::Boards do
 
   # EE only
   set(:milestone) { create(:milestone, project: project) }
+  set(:board_label) { create(:label, project: project) }
 
   set(:board) do
-    create(:board, project: project, milestone: milestone, lists: [dev_list, test_list])
+    create(:board, project: project, milestone: milestone, assignee: user,
+           label_ids: [board_label.id], lists: [dev_list, test_list])
   end
 
   before do