未初始化的常量ActionDispatch :: Routing :: Mapper :: Scope（名称错误）

Question

我试图调试错误。

@scope = ActionDispatch::Routing::Mapper::Scope.new(
      path:         "",
      shallow_path: "",
      constraints:  {},
      defaults:     {},
      options:      {},
      parent:       nil
    )

但我收到错误：

NameError: uninitialized constant ActionDispatch::Routing::Mapper::Scope

有什么想法吗？

我使用的是Rails 4.1.6

Answer 1

ActionDispatch::Routing::Mapper::Scoping

http://api.rubyonrails.org/classes/ActionDispatch/Routing/Mapper/Scoping.html