Add `has_many` associations for models that can have Upload records

app/models/appearance.rb

@@ -10,4 +10,5 @@ class Appearance < ActiveRecord::Base
   mount_uploader :logo,         AttachmentUploader
   mount_uploader :header_logo,  AttachmentUploader
+  has_many :uploads, as: :model, dependent: :destroy
 end

app/models/group.rb

@@ -28,6 +28,7 @@ class Group < Namespace
   validates :avatar, file_size: { maximum: 200.kilobytes.to_i }
   mount_uploader :avatar, AvatarUploader
+  has_many :uploads, as: :model, dependent: :destroy
   after_create :post_create_hook
   after_destroy :post_destroy_hook

app/models/project.rb

@@ -212,6 +212,7 @@ class Project < ActiveRecord::Base
   before_save :ensure_runners_token
   mount_uploader :avatar, AvatarUploader
+  has_many :uploads, as: :model, dependent: :destroy
   # Scopes
   default_scope { where(pending_delete: false) }

app/models/user.rb

@@ -191,6 +191,7 @@ class User < ActiveRecord::Base
   end
   mount_uploader :avatar, AvatarUploader
+  has_many :uploads, as: :model, dependent: :destroy
   # Scopes
   scope :admins, -> { where(admin: true) }

spec/models/appearance_spec.rb

@@ -7,4 +7,6 @@ RSpec.describe Appearance, type: :model do
   it { is_expected.to validate_presence_of(:title) }
   it { is_expected.to validate_presence_of(:description) }
+
+  it { is_expected.to have_many(:uploads).dependent(:destroy) }
 end

spec/models/group_spec.rb

@@ -13,6 +13,7 @@ describe Group, models: true do
     it { is_expected.to have_many(:shared_projects).through(:project_group_links) }
     it { is_expected.to have_many(:notification_settings).dependent(:destroy) }
     it { is_expected.to have_many(:labels).class_name('GroupLabel') }
+    it { is_expected.to have_many(:uploads).dependent(:destroy) }
     describe '#members & #requesters' do
       let(:requester) { create(:user) }

spec/models/project_spec.rb

@@ -71,6 +71,7 @@ describe Project, models: true do
     it { is_expected.to have_many(:project_group_links).dependent(:destroy) }
     it { is_expected.to have_many(:notification_settings).dependent(:destroy) }
     it { is_expected.to have_many(:forks).through(:forked_project_links) }
+    it { is_expected.to have_many(:uploads).dependent(:destroy) }
     context 'after initialized' do
       it "has a project_feature" do

spec/models/user_spec.rb

@@ -36,6 +36,7 @@ describe User, models: true do
     it { is_expected.to have_many(:builds).dependent(:nullify) }
     it { is_expected.to have_many(:pipelines).dependent(:nullify) }
     it { is_expected.to have_many(:chat_names).dependent(:destroy) }
+    it { is_expected.to have_many(:uploads).dependent(:destroy) }
     describe '#group_members' do
       it 'does not include group memberships for which user is a requester' do