_exec_scope

# File activerecord/lib/active_record/relation.rb, line 432
    def _exec_scope(*args, &block) # :nodoc:
      @delegate_to_klass = true
      registry = klass.scope_registry
      _scoping(nil, registry) { instance_exec(*args, &block) || self }
    ensure
      @delegate_to_klass = false
    end