Enable RuboCop for migrations

Migrations shouldn't fail RuboCop checks - especially lint checks, such
as the nested method check. To avoid changing code in existing
migrations, add the magic comment to the top of each of them to skip
that file.

.rubocop.yml

@@ -13,7 +13,8 @@ AllCops:
   # Exclude some GitLab files
   Exclude:
     - 'vendor/**/*'
-    - 'db/**/*'
+    - 'db/*'
+    - 'db/fixtures/**/*'
     - 'tmp/**/*'
     - 'bin/**/*'
     - 'lib/backup/**/*'

db/migrate/20121220064453_init_schema.rb

+# rubocop:disable all
 class InitSchema < ActiveRecord::Migration
   def up

db/migrate/20130102143055_rename_owner_to_creator_for_project.rb

+# rubocop:disable all
 class RenameOwnerToCreatorForProject < ActiveRecord::Migration
   def change
     rename_column :projects, :owner_id, :creator_id

db/migrate/20130110172407_add_public_to_project.rb

+# rubocop:disable all
 class AddPublicToProject < ActiveRecord::Migration
   def change
     add_column :projects, :public, :boolean, default: false, null: false

db/migrate/20130123114545_add_issues_tracker_to_project.rb

+# rubocop:disable all
 class AddIssuesTrackerToProject < ActiveRecord::Migration
   def change
     add_column :projects, :issues_tracker, :string, default: :gitlab, null: false

db/migrate/20130125090214_add_user_permissions.rb

+# rubocop:disable all
 class AddUserPermissions < ActiveRecord::Migration
   def up
     add_column :users, :can_create_group, :boolean, default: true, null: false

db/migrate/20130131070232_remove_private_flag_from_project.rb

+# rubocop:disable all
 class RemovePrivateFlagFromProject < ActiveRecord::Migration
   def up
     remove_column :projects, :private_flag

db/migrate/20130206084024_add_description_to_namsespace.rb

+# rubocop:disable all
 class AddDescriptionToNamsespace < ActiveRecord::Migration
   def change
     add_column :namespaces, :description, :string, default: '', null: false

db/migrate/20130207104426_add_description_to_teams.rb

+# rubocop:disable all
 class AddDescriptionToTeams < ActiveRecord::Migration
   def change
     add_column :user_teams, :description, :string, default: '', null: false

db/migrate/20130211085435_add_issues_tracker_id_to_project.rb

+# rubocop:disable all
 class AddIssuesTrackerIdToProject < ActiveRecord::Migration
   def change
     add_column :projects, :issues_tracker_id, :string

db/migrate/20130214154045_rename_state_to_merge_status_in_milestone.rb

+# rubocop:disable all
 class RenameStateToMergeStatusInMilestone < ActiveRecord::Migration
   def change
     rename_column :merge_requests, :state, :merge_status

db/migrate/20130218140952_add_state_to_issue.rb

+# rubocop:disable all
 class AddStateToIssue < ActiveRecord::Migration
   def change
     add_column :issues, :state, :string

db/migrate/20130218141038_add_state_to_merge_request.rb

+# rubocop:disable all
 class AddStateToMergeRequest < ActiveRecord::Migration
   def change
     add_column :merge_requests, :state, :string

db/migrate/20130218141117_add_state_to_milestone.rb

+# rubocop:disable all
 class AddStateToMilestone < ActiveRecord::Migration
   def change
     add_column :milestones, :state, :string

db/migrate/20130218141258_convert_closed_to_state_in_issue.rb

+# rubocop:disable all
 class ConvertClosedToStateInIssue < ActiveRecord::Migration
   include Gitlab::Database

db/migrate/20130218141327_convert_closed_to_state_in_merge_request.rb

+# rubocop:disable all
 class ConvertClosedToStateInMergeRequest < ActiveRecord::Migration
   include Gitlab::Database

db/migrate/20130218141344_convert_closed_to_state_in_milestone.rb

+# rubocop:disable all
 class ConvertClosedToStateInMilestone < ActiveRecord::Migration
   include Gitlab::Database

db/migrate/20130218141444_remove_merged_from_merge_request.rb

+# rubocop:disable all
 class RemoveMergedFromMergeRequest < ActiveRecord::Migration
   def up
     remove_column :merge_requests, :merged

db/migrate/20130218141507_remove_closed_from_issue.rb

+# rubocop:disable all
 class RemoveClosedFromIssue < ActiveRecord::Migration
   def up
     remove_column :issues, :closed

db/migrate/20130218141536_remove_closed_from_merge_request.rb

+# rubocop:disable all
 class RemoveClosedFromMergeRequest < ActiveRecord::Migration
   def up
     remove_column :merge_requests, :closed