Question

我正在使用Backbone和Rails并尝试将新模型保存到服务器。但是，在模型上调用.save()似乎没有做任何事情。查看Chrome中的“网络”标签，我看不到任何要求。这是我的代码：

模型

class MyApp.Models.Chain extends Backbone.Model
    defaults:
        steps: []
        id: null

    urlRoot: '/chains'

    validate: (attrs) ->
        if $.trim(attrs.steps[@step_number - 1]) == ''
            return "Step can't be blank."

查看

class MyApp.Views.ChainsNew extends Backbone.View

    # @template is defined by a conditional inside render()
    initialize: ->
        @is_saving = false

    events:
        'click #btn-go': 'add_step'
        'click #btn-done': 'save'

    render: (step_number) ->
        @model.step_number = step_number

        @template = if @model.step_number is 1 then JST['chains/new'] else JST['chains/step']
        $(@el).html(@template({previous_step_text: @model.get('steps')[step_number - 2]}))

        @

    add_step: ->
        #divide array into arrays of steps before and after step being edited
        steps = @model.get('steps')
        array1 = steps.slice(0, @step_number - 1)
        array2 = steps.slice(@step_number)
        array1.push(@$el.find('textarea').val())
        newArray = array2.concat(array1)

        if !@model.set({steps: newArray}, {validate: true})
            alert(@model.validationError)
            false
        else
            true #need to a return a value for the `save` method

    save: ->
        @is_saving = true
        if @add_step
            @model.save(null, {
                success: ->
                    console.log(arguments)

                error: ->
                    console.log(arguments)
            })

我知道正在调用@model.save，因为我已经在它之前将一条消息记录到控制台（换句话说，if @add_step为真）。

Answer 1

最有可能的是，您的模型验证失败，导致save返回false并且不进行API调用。试试

class MyApp.Models.Chain extends Backbone.Model
    defaults:
        steps: []
        id: null

    urlRoot: '/chains'

    validate: (attrs) ->
        if $.trim(attrs.steps[@step_number - 1]) == ''
            console.log "Houston, we have a problem"
            return "Step can't be blank."

如果您在控制台中看到一条消息，则表明存在问题。您还可以尝试对validate函数进行完全注释，并且应该在所有情况下都进行API调用。

Backbone模型save（）方法没有做任何事情

1 个答案: