Default /merge_request API endpoint to `scope=created-by-me`

This matches the behavior of the /issues endpoint.

doc/api/merge_requests.md

@@ -4,7 +4,12 @@ Every API call to merge requests must be authenticated.
 
 ## List merge requests
 
-Get all merge requests the authenticated user has access to.
+> [Introduced][ce-13060] in GitLab 9.5.
+
+Get all merge requests the authenticated user has access to. By
+default it returns only merge requests created by the current user. To
+get all merge requests, use parameter `scope=all`.
+
 The `state` parameter can be used to get only merge requests with a
 given state (`opened`, `closed`, or `merged`) or all of them (`all`).
 The pagination parameters `page` and `per_page` can be used to
@@ -32,9 +37,9 @@ Parameters:
 | `labels`  | string  | no | Return merge requests matching a comma separated list of labels |
 | `created_after` | datetime | no | Return merge requests created after the given time (inclusive) |
 | `created_before` | datetime | no | Return merge requests created before the given time (inclusive) |
-| `author_id` | integer | no | Returns merge requests created by the given user `id` |
+| `scope` | string | no | Return merge requests for the given scope: `created-by-me`, `assigned-to-me` or `all`. Defaults to `created-by-me` |
+| `author_id` | integer | no | Returns merge requests created by the given user `id`. Combine with `scope=all` or `scope=assigned-to-me` |
 | `assignee_id` | integer | no | Returns merge requests assigned to the given user `id` |
-| `scope` | string | no | Return merge requests for the given scope: `created-by-me`, `assigned-to-me` or `all` |
 
 ```json
 [
@@ -121,6 +126,9 @@ Parameters:
 | `labels`  | string  | no | Return merge requests matching a comma separated list of labels |
 | `created_after` | datetime | no | Return merge requests created after the given time (inclusive) |
 | `created_before` | datetime | no | Return merge requests created before the given time (inclusive) |
+| `scope` | string | no | Return merge requests for the given scope: `created-by-me`, `assigned-to-me` or `all` _([Introduced][ce-13060] in GitLab 9.5)_ |
+| `author_id` | integer | no | Returns merge requests created by the given user `id` _([Introduced][ce-13060] in GitLab 9.5)_ |
+| `assignee_id` | integer | no | Returns merge requests assigned to the given user `id` _([Introduced][ce-13060] in GitLab 9.5)_ |
 
 ```json
 [
@@ -1257,3 +1265,5 @@ Example response:
   "total_time_spent": 3600
 }
 ```
+
+[ce-13060]: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/13060

lib/api/merge_requests.rb

@@ -38,7 +38,7 @@ module API
         optional :view, type: String, values: %w[simple], desc: 'If simple, returns the `iid`, URL, title, description, and basic state of merge request'
         optional :author_id, type: Integer, desc: 'Return merge requests which are authored by the user with the given ID'
         optional :assignee_id, type: Integer, desc: 'Return merge requests which are assigned to the user with the given ID'
-        optional :scope, type: String, values: %w[created-by-me assigned-to-me all], default: 'all',
+        optional :scope, type: String, values: %w[created-by-me assigned-to-me all],
                          desc: 'Return merge requests for the given scope: `created-by-me`, `assigned-to-me` or `all`'
         use :pagination
       end
@@ -50,6 +50,8 @@ module API
       end
       params do
         use :merge_requests_params
+        optional :scope, type: String, values: %w[created-by-me assigned-to-me all], default: 'created-by-me',
+                         desc: 'Return merge requests for the given scope: `created-by-me`, `assigned-to-me` or `all`'
       end
       get do
         merge_requests = find_merge_requests

spec/requests/api/merge_requests_spec.rb

@@ -41,7 +41,7 @@ describe API::MergeRequests do
       let(:user2) { create(:user) }
 
       it 'returns an array of all merge requests' do
-        get api('/merge_requests', user)
+        get api('/merge_requests', user), scope: :all
 
         expect(response).to have_http_status(200)
         expect(response).to include_pagination_headers
@@ -54,7 +54,7 @@ describe API::MergeRequests do
         private_project = create(:empty_project, :private)
         merge_request3 = create(:merge_request, :simple, source_project: private_project, target_project: private_project, source_branch: 'other-branch')
 
-        get api('/merge_requests', user)
+        get api('/merge_requests', user), scope: :all
 
         expect(response).to have_http_status(200)
         expect(response).to include_pagination_headers
@@ -63,10 +63,21 @@ describe API::MergeRequests do
           .not_to include(merge_request3.id)
       end
 
+      it 'returns an array of merge requests created by current user if no scope is given' do
+        merge_request3 = create(:merge_request, :simple, author: user2, assignee: user, source_project: project2, target_project: project2, source_branch: 'other-branch')
+
+        get api('/merge_requests', user2)
+
+        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['id']).to eq(merge_request3.id)
+      end
+
       it 'returns an array of merge requests authored by the given user' do
         merge_request3 = create(:merge_request, :simple, author: user2, assignee: user, source_project: project2, target_project: project2, source_branch: 'other-branch')
 
-        get api('/merge_requests', user), author_id: user2.id
+        get api('/merge_requests', user), author_id: user2.id, scope: :all
 
         expect(response).to have_http_status(200)
         expect(json_response).to be_an Array
@@ -77,7 +88,7 @@ describe API::MergeRequests do
       it 'returns an array of merge requests assigned to the given user' do
         merge_request3 = create(:merge_request, :simple, author: user, assignee: user2, source_project: project2, target_project: project2, source_branch: 'other-branch')
 
-        get api('/merge_requests', user), assignee_id: user2.id
+        get api('/merge_requests', user), assignee_id: user2.id, scope: :all
 
         expect(response).to have_http_status(200)
         expect(json_response).to be_an Array