Modified release api entity

Updated release payload to include links.
Updated rspec accordingly.

lib/api/entities.rb

@@ -1314,6 +1314,10 @@ module API
           release.links.sorted
         end
       end
+      expose :_links do
+        expose :merge_requests
+        expose :issues
+      end
 
       private
 
@@ -1324,11 +1328,27 @@ module API
       def commit_path
         return unless object.commit
 
-        Gitlab::Routing.url_helpers.project_commit_path(object.project, object.commit.id)
+        Gitlab::Routing.url_helpers.project_commit_path(project, object.commit.id)
       end
 
       def tag_path
-        Gitlab::Routing.url_helpers.project_tag_path(object.project, object.tag)
+        Gitlab::Routing.url_helpers.project_tag_path(project, object.tag)
+      end
+
+      def merge_requests
+        Gitlab::Routing.url_helpers.project_merge_requests_url(project, params_for_issues_and_mrs)
+      end
+
+      def issues
+        Gitlab::Routing.url_helpers.project_issues_url(project, params_for_issues_and_mrs)
+      end
+
+      def params_for_issues_and_mrs
+        { scope: 'all', state: 'opened', release_tag: object.tag }
+      end
+
+      def project
+        @project ||= object.project
       end
     end
 

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

@@ -36,6 +36,13 @@
         }
       },
       "additionalProperties": false
+    },
+    "_links": {
+      "required": ["merge_requests", "issues"],
+      "properties": {
+        "merge_requests": { "type": "string" },
+        "issues": { "type": "string" }
+      }
     }
   },
   "additionalProperties": false

spec/fixtures/api/schemas/public_api/v4/release/release_for_guest.json

@@ -24,6 +24,13 @@
         "links": { "$ref": "../../../release/links.json" }
       },
       "additionalProperties": false
+    },
+    "_links": {
+      "required": ["merge_requests", "issues"],
+      "properties": {
+        "merge_requests": { "type": "string" },
+        "issues": { "type": "string" }
+      }
     }
   },
   "additionalProperties": false

spec/requests/api/releases_spec.rb

@@ -63,6 +63,30 @@ describe API::Releases do
         expect(json_response.second['commit_path']).to eq("/#{release_1.project.full_path}/commit/#{release_1.commit.id}")
         expect(json_response.second['tag_path']).to eq("/#{release_1.project.full_path}/-/tags/#{release_1.tag}")
       end
+
+      it 'returns the merge requests and issues links' do
+        get api("/projects/#{project.id}/releases", maintainer)
+
+        links = json_response.first['_links']
+
+        expect(links.keys).to include('merge_requests', 'issues')
+        expect(links['merge_requests']).to include("/#{release_2.project.full_path}/merge_requests")
+        expect(links['issues']).to include("/#{release_2.project.full_path}/issues")
+      end
+
+      it 'returns urls with correct parameters and release tag' do
+        get api("/projects/#{project.id}/releases", maintainer)
+
+        links = json_response.first['_links']
+        release = json_response.first['tag_name']
+        expected_params = %w(release_tag scope state)
+        release_tag_param = "release_tag=#{release}"
+
+        expect(links['merge_requests'].split('?')[1]).to include(*expected_params)
+        expect(links['issues'].split('?')[1]).to include(*expected_params)
+        expect(links['merge_requests']).to include(release_tag_param)
+        expect(links['issues']).to include(release_tag_param)
+      end
     end
 
     it 'returns an upcoming_release status for a future release' do