Question

有人可以解释为什么我的@model变量在我的ajax调用中不可用吗？当我尝试在错误回调中使用@model变量时，它不存在。

$.ajax URL+ "/api/v1/menu_items/#{@model.id}/verify",
    type: 'PUT'
    data: formData 

    error: (response) ->
      alert(response)
      window.location.href = "/menu_items/#{@model.id}"
    success: (data) ->
      window.location.href = "/menu_items/#{data.id}"

Answer 1

如果要在函数定义的外部范围内保留this，请使用=> fat arrow。

检查以下评论。

$.ajax URL+ "/api/v1/menu_items/#{@model.id}/verify",
    type: 'PUT'
    data: formData 

    # this reference to the `this' where $.ajax is called.

    error: (response) => # a function definition here. use => to bind this to the outer scope
      alert(response)
      window.location.href = "/menu_items/#{@model.id}"
    success: (data) ->
      # in this function, this will be bound to the object on which the success callback is called, normally, null
      window.location.href = "/menu_items/#{data.id}"

变量在ajax调用中不可用

1 个答案: