Expose project for environments

lib/api/entities.rb

@@ -512,6 +512,7 @@ module API
 
     class Environment < Grape::Entity
       expose :id, :name, :external_url
+      expose :project, using: Entities::Project
     end
 
     class EnvironmentBasic < Grape::Entity

spec/requests/api/environments_spec.rb

@@ -26,6 +26,7 @@ describe API::API, api: true  do
         expect(json_response.size).to eq(1)
         expect(json_response.first['name']).to eq(environment.name)
         expect(json_response.first['external_url']).to eq(environment.external_url)
+        expect(json_response.first['project']['id']).to eq(project.id)
       end
     end