API: Ability to get group's project in simple representation

changelogs/unreleased/api-simple-group-project.yml

+---
+title: 'API: Simple representation of group''s projects'
+merge_request: 8060
+author: Robert Schilling

doc/api/groups.md

@@ -50,12 +50,17 @@ GET /groups/:id/projects
 
 Parameters:
 
-- `archived` (optional) - if passed, limit by archived status
-- `visibility` (optional) - if passed, limit by visibility `public`, `internal`, `private`
-- `order_by` (optional) - Return requests ordered by `id`, `name`, `path`, `created_at`, `updated_at` or `last_activity_at` fields. Default is `created_at`
-- `sort` (optional) - Return requests sorted in `asc` or `desc` order. Default is `desc`
-- `search` (optional) - Return list of authorized projects according to a search criteria
-- `ci_enabled_first` - Return projects ordered by ci_enabled flag. Projects with enabled GitLab CI go first
+| Attribute | Type | Required | Description |
+| --------- | ---- | -------- | ----------- |
+| `id` | integer/string | yes | The ID or path of a group |
+| `archived` | boolean | no | Limit by archived status |
+| `visibility` | string | no | Limit by visibility `public`, `internal`, or `private` |
+| `order_by` | string | no | Return projects ordered by `id`, `name`, `path`, `created_at`, `updated_at`, or `last_activity_at` fields. Default is `created_at` |
+| `sort` | string | no | Return projects sorted in `asc` or `desc` order. Default is `desc` |
+| `search` | string | no | Return list of authorized projects matching the search criteria |
+| `simple` | boolean | no | Return only the ID, URL, name, and path of each project |
+
+Example response:
 
 ```json
 [

lib/api/groups.rb

@@ -125,13 +125,16 @@ module API
                             default: 'created_at', desc: 'Return projects ordered by field'
         optional :sort, type: String, values: %w[asc desc], default: 'desc',
                         desc: 'Return projects sorted in ascending and descending order'
+        optional :simple, type: Boolean, default: false,
+                          desc: 'Return only the ID, URL, name, and path of each project'
         use :pagination
       end
       get ":id/projects" do
         group = find_group!(params[:id])
         projects = GroupProjectsFinder.new(group).execute(current_user)
         projects = filter_projects(projects)
-        present paginate(projects), with: Entities::Project, user: current_user
+        entity = params[:simple] ? Entities::BasicProjectDetails : Entities::Project
+        present paginate(projects), with: entity, user: current_user
       end
 
       desc 'Transfer a project to the group namespace. Available only for admin.' do

spec/requests/api/groups_spec.rb

@@ -243,17 +243,28 @@ describe API::Groups, api: true  do
         expect(json_response.length).to eq(2)
         project_names = json_response.map { |proj| proj['name' ] }
         expect(project_names).to match_array([project1.name, project3.name])
+        expect(json_response.first['default_branch']).to be_present
+      end
+
+      it "returns the group's projects with simple representation" do
+        get api("/groups/#{group1.id}/projects", user1), simple: true
+
+        expect(response).to have_http_status(200)
+        expect(json_response.length).to eq(2)
+        project_names = json_response.map { |proj| proj['name' ] }
+        expect(project_names).to match_array([project1.name, project3.name])
+        expect(json_response.first['default_branch']).not_to be_present
       end
 
       it 'filters the groups projects' do
-        public_projet = create(:project, :public, path: 'test1', group: group1)
+        public_project = create(:project, :public, path: 'test1', group: group1)
 
         get api("/groups/#{group1.id}/projects", user1), visibility: 'public'
 
         expect(response).to have_http_status(200)
         expect(json_response).to be_an(Array)
         expect(json_response.length).to eq(1)
-        expect(json_response.first['name']).to eq(public_projet.name)
+        expect(json_response.first['name']).to eq(public_project.name)
       end
 
       it "does not return a non existing group" do