Add repository_read_only column to NamespaceSettings table

changelogs/unreleased/299052-fj-add-repository-read-only-column-to-namespace-settings.yml

+---
+title: Add repository_read_only column to NamespaceSettings table
+merge_request: 52300
+author:
+type: added

db/migrate/20210122073805_add_repository_read_only_to_namespace_settings.rb

+# frozen_string_literal: true
+
+class AddRepositoryReadOnlyToNamespaceSettings < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  def up
+    with_lock_retries do
+      add_column :namespace_settings, :repository_read_only, :boolean, default: false, null: false
+    end
+  end
+
+  def down
+    with_lock_retries do
+      remove_column :namespace_settings, :repository_read_only
+    end
+  end
+end

db/schema_migrations/20210122073805

+f5231b1eec17ea1a67f2d2f4ca759314afb85b2c8fb431e3303d530d44bdb1ef
\ No newline at end of file

db/structure.sql

@@ -14310,6 +14310,7 @@ CREATE TABLE namespace_settings (
     prevent_forking_outside_group boolean DEFAULT false NOT NULL,
     allow_mfa_for_subgroups boolean DEFAULT true NOT NULL,
     default_branch_name text,
+    repository_read_only boolean DEFAULT false NOT NULL,
     CONSTRAINT check_0ba93c78c7 CHECK ((char_length(default_branch_name) <= 255))
 );