build_default_scope

# File activerecord/lib/active_record/scoping/default.rb, line 105
        def build_default_scope # :nodoc:
          if !Base.is_a?(method(:default_scope).owner)
            # The user has defined their own default scope method, so call that
            evaluate_default_scope { default_scope }
          elsif default_scopes.any?
            evaluate_default_scope do
              default_scopes.inject(relation) do |default_scope, scope|
                if !scope.is_a?(Relation) && scope.respond_to?(:call)
                  default_scope.merge(unscoped { scope.call })
                else
                  default_scope.merge(scope)
                end
              end
            end
          end
        end