Add structure to support EE feature of COAR

These are the structural changes for supporting the EE feature of moving
"code_owner_approval_required" state from existing on a project to being
on the protected branches individually, allowing for CODEOWNER
validation on push events.

2 files changed, 33 insertions, 0 deletions

diff --git a/db/migrate/20190729180447_add_merge_requests_require_code_owner_approval_to_protected_branches.rb b/db/migrate/20190729180447_add_merge_requests_require_code_owner_approval_to_protected_branches.rb
new file mode 100644
index 00000000000..098fcff9ace
--- /dev/null
+++ b/db/migrate/20190729180447_add_merge_requests_require_code_owner_approval_to_protected_branches.rb
@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+class AddMergeRequestsRequireCodeOwnerApprovalToProtectedBranches < ActiveRecord::Migration[5.2]
+  include Gitlab::Database::MigrationHelpers
+
+  # Set this constant to true if this migration requires downtime.
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    add_column_with_default(
+      :protected_branches,
+      :code_owner_approval_required,
+      :boolean,
+      default: false
+    )
+
+    add_concurrent_index(
+      :protected_branches,
+      [:project_id, :code_owner_approval_required],
+      name: "code_owner_approval_required",
+      where: "code_owner_approval_required = #{Gitlab::Database.true_value}")
+  end
+
+  def down
+    remove_concurrent_index(:protected_branches, name: "code_owner_approval_required")
+
+    remove_column(:protected_branches, :code_owner_approval_required)
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 98c4403efe1..9d7cdaed70c 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -2932,6 +2932,8 @@ ActiveRecord::Schema.define(version: 2019_09_04_173203) do
     t.string "name", null: false
     t.datetime "created_at"
     t.datetime "updated_at"
+    t.boolean "code_owner_approval_required", default: false, null: false
+    t.index ["project_id", "code_owner_approval_required"], name: "code_owner_approval_required", where: "(code_owner_approval_required = true)"
     t.index ["project_id"], name: "index_protected_branches_on_project_id"
   end