Narrow environment payload by using basic project details resource

changelogs/unreleased/28598-narrow-environment-payload-by-using-basic-project.yml

+---
+title: Narrow environment payload by using basic project details resource
+merge_request:
+author:

doc/api/v3_to_v4.md

@@ -68,3 +68,5 @@ changes are in V4:
 - Rename Build Triggers to be Pipeline Triggers API [!9713](https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/9713)
   - `POST /projects/:id/trigger/builds` to `POST /projects/:id/trigger/pipeline`
   - Require description when creating a new trigger `POST /projects/:id/triggers`
+- Simplify project payload exposed on Environment endpoints [!9675](https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/9675)
+

lib/api/entities.rb

@@ -671,7 +671,7 @@ module API
     end
 
     class Environment < EnvironmentBasic
-      expose :project, using: Entities::Project
+      expose :project, using: Entities::BasicProjectDetails
     end
 
     class Deployment < Grape::Entity

spec/requests/api/environments_spec.rb

@@ -15,6 +15,8 @@ describe API::Environments, api: true  do
   describe 'GET /projects/:id/environments' do
     context 'as member of the project' do
       it 'returns project environments' do
+        project_data_keys = %w(id http_url_to_repo web_url name name_with_namespace path path_with_namespace)
+
         get api("/projects/#{project.id}/environments", user)
 
         expect(response).to have_http_status(200)
@@ -23,8 +25,7 @@ describe API::Environments, 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)
-        expect(json_response.first['project']['visibility']).to be_present
+        expect(json_response.first['project'].keys).to contain_exactly(*project_data_keys)
       end
     end