Don't expose all namespace fields in API

lib/api/entities.rb

@@ -88,7 +88,7 @@ module API
       expose :shared_runners_enabled
       expose :lfs_enabled?, as: :lfs_enabled
       expose :creator_id
-      expose :namespace
+      expose :namespace, using: 'API::Entities::Namespace'
       expose :forked_from_project, using: Entities::BasicProjectDetails, if: lambda{ |project, options| project.forked? }
       expose :avatar_url
       expose :star_count, :forks_count
@@ -391,7 +391,7 @@ module API
     end
     class Namespace < Grape::Entity
-      expose :id, :path, :kind
+      expose :id, :name, :path, :kind
     end
     class MemberAccess < Grape::Entity

spec/requests/api/projects_spec.rb

@@ -630,6 +630,18 @@ describe API::Projects, api: true  do
         expect(json_response['name']).to eq(project.name)
       end
+      it 'exposes namespace fields' do
+        get api("/projects/#{project.id}", user)
+
+        expect(response).to have_http_status(200)
+        expect(json_response['namespace']).to eq({
+          'id' => user.namespace.id,
+          'name' => user.namespace.name,
+          'path' => user.namespace.path,
+          'kind' => user.namespace.kind,
+        })
+      end
+
       describe 'permissions' do
         context 'all projects' do
           before { project.team << [user, :master] }