Add uniqueness validation to url column in Releases::Link model

Add test

Add changelog

app/models/releases/link.rb

@@ -6,7 +6,7 @@ module Releases
     belongs_to :release
-    validates :url, presence: true, url: true
+    validates :url, presence: true, url: true, uniqueness: { scope: :release }
     validates :name, presence: true, uniqueness: { scope: :release }
     scope :sorted, -> { order(created_at: :desc) }

changelogs/unreleased/add-uniqueness-validation-to-url-column-in-releases-link-model.yml

+---
+title: Add uniqueness validation to url column in Releases::Link model
+merge_request: 24223
+author:
+type: other

spec/models/releases/link_spec.rb

@@ -31,6 +31,16 @@ describe Releases::Link do
         end.to raise_error(ActiveRecord::RecordInvalid)
       end
     end
+
+    context 'when duplicate url is added to a release' do
+      let!(:link) { create(:release_link, url: 'http://gitlab.com', release: release) }
+
+      it 'raises an error' do
+        expect do
+          create(:release_link, url: 'http://gitlab.com', release: release)
+        end.to raise_error(ActiveRecord::RecordInvalid)
+      end
+    end
   end
   describe '.sorted' do