Expose missing disable mention value on group API

doc/api/groups.md

@@ -40,6 +40,7 @@ GET /groups
     "auto_devops_enabled": null,
     "subgroup_creation_level": "owner",
     "emails_disabled": null,
+    "mentions_disabled": null,
     "lfs_enabled": true,
     "avatar_url": "http://localhost:3000/uploads/group/avatar/1/foo.jpg",
     "web_url": "http://localhost:3000/groups/foo-bar",
@@ -73,6 +74,7 @@ GET /groups?statistics=true
     "auto_devops_enabled": null,
     "subgroup_creation_level": "owner",
     "emails_disabled": null,
+    "mentions_disabled": null,
     "lfs_enabled": true,
     "avatar_url": "http://localhost:3000/uploads/group/avatar/1/foo.jpg",
     "web_url": "http://localhost:3000/groups/foo-bar",
@@ -144,6 +146,7 @@ GET /groups/:id/subgroups
     "auto_devops_enabled": null,
     "subgroup_creation_level": "owner",
     "emails_disabled": null,
+    "mentions_disabled": null,
     "lfs_enabled": true,
     "avatar_url": "http://gitlab.example.com/uploads/group/avatar/1/foo.jpg",
     "web_url": "http://gitlab.example.com/groups/foo-bar",
@@ -486,6 +489,7 @@ Parameters:
 | `auto_devops_enabled`                | boolean | no       | Default to Auto DevOps pipeline for all projects within this group. |
 | `subgroup_creation_level`            | integer | no       | Allowed to create subgroups. Can be `owner` (Owners), or `maintainer` (Maintainers). |
 | `emails_disabled`                    | boolean | no       | Disable email notifications |
+| `mentions_disabled`                  | boolean | no       | Disable the capability of a group from getting mentioned |
 | `lfs_enabled`                        | boolean | no       | Enable/disable Large File Storage (LFS) for the projects in this group. |
 | `request_access_enabled`             | boolean | no       | Allow users to request member access. |
 | `parent_id`                          | integer | no       | The parent group ID for creating nested group. |
@@ -531,6 +535,7 @@ PUT /groups/:id
 | `auto_devops_enabled`                | boolean | no       | Default to Auto DevOps pipeline for all projects within this group. |
 | `subgroup_creation_level`            | integer | no       | Allowed to create subgroups. Can be `owner` (Owners), or `maintainer` (Maintainers). |
 | `emails_disabled`                    | boolean | no       | Disable email notifications |
+| `mentions_disabled`                  | boolean | no       | Disable the capability of a group from getting mentioned |
 | `lfs_enabled` (optional)             | boolean | no       | Enable/disable Large File Storage (LFS) for the projects in this group. |
 | `request_access_enabled`             | boolean | no       | Allow users to request member access. |
 | `file_template_project_id`           | integer | no       | **(PREMIUM)** The ID of a project to load custom file templates from. |

lib/api/entities.rb

@@ -414,6 +414,7 @@ module API
       expose :auto_devops_enabled
       expose :subgroup_creation_level_str, as: :subgroup_creation_level
       expose :emails_disabled
+      expose :mentions_disabled
       expose :lfs_enabled?, as: :lfs_enabled
       expose :avatar_url do |group, options|
         group.avatar_url(only_path: false)

lib/api/helpers/groups_helpers.rb

@@ -18,6 +18,7 @@ module API
         optional :auto_devops_enabled, type: Boolean, desc: 'Default to Auto DevOps pipeline for all projects within this group'
         optional :subgroup_creation_level, type: String, values: ::Gitlab::Access.subgroup_creation_string_values, desc: 'Allowed to create subgroups', as: :subgroup_creation_level_str
         optional :emails_disabled, type: Boolean, desc: 'Disable email notifications'
+        optional :mentions_disabled, type: Boolean, desc: 'Disable a group from getting mentioned'
         optional :lfs_enabled, type: Boolean, desc: 'Enable/disable LFS for the projects in this group'
         optional :request_access_enabled, type: Boolean, desc: 'Allow users to request member access'
       end

spec/requests/api/groups_spec.rb

@@ -358,6 +358,7 @@ describe API::Groups do
         expect(json_response['two_factor_grace_period']).to eq(group1.two_factor_grace_period)
         expect(json_response['auto_devops_enabled']).to eq(group1.auto_devops_enabled)
         expect(json_response['emails_disabled']).to eq(group1.emails_disabled)
+        expect(json_response['mentions_disabled']).to eq(group1.mentions_disabled)
         expect(json_response['project_creation_level']).to eq('maintainer')
         expect(json_response['subgroup_creation_level']).to eq('maintainer')
         expect(json_response['web_url']).to eq(group1.web_url)
@@ -556,6 +557,7 @@ describe API::Groups do
         expect(json_response['two_factor_grace_period']).to eq(48)
         expect(json_response['auto_devops_enabled']).to eq(nil)
         expect(json_response['emails_disabled']).to eq(nil)
+        expect(json_response['mentions_disabled']).to eq(nil)
         expect(json_response['project_creation_level']).to eq("noone")
         expect(json_response['subgroup_creation_level']).to eq("maintainer")
         expect(json_response['request_access_enabled']).to eq(true)