gitlab-org--gitlab-foss/config/initializers/attr_encrypted_no_db_connection.rb

module AttrEncrypted
  module Adapters
    module ActiveRecord
      def attribute_instance_methods_as_symbols_with_no_db_connection
        # Use with_connection so the connection doesn't stay pinned to the thread.
        connected = ::ActiveRecord::Base.connection_pool.with_connection(&:active?) rescue false
        
        if connected
          # Call version from AttrEncrypted::Adapters::ActiveRecord
          attribute_instance_methods_as_symbols_without_no_db_connection
        else
          # Call version from AttrEncrypted, i.e., `super` with regards to AttrEncrypted::Adapters::ActiveRecord
          AttrEncrypted.instance_method(:attribute_instance_methods_as_symbols).bind(self).call
        end
      end

      alias_method_chain :attribute_instance_methods_as_symbols, :no_db_connection
    end
  end
end