未定义的方法`simple_field_for'为＃<＃<Class：0x007fa76a658768>：0x007fa76a962d50>

Question

我试图用茧宝石创建一些混合简单窗体的嵌套窗体，当我实现窗体时，我得到Undefined method simple_field_for。我对Rails相当陌生，所以如果这是一个愚蠢的修复，我会提前道歉，但我已经扫描Stack Overflow和Google足够长的时间，因为我已经决定发布并询问。我正在遵循的教程在视图中使用haml。以下是我的代码，请让我知道是否需要发布其他信息以帮助解决错误。谢谢！

总计错误消息：

undefined method `simple_field_for' for #<#<Class:0x007fa76a658768>:0x007fa76a962d50> 

.row 
    .col-md-6 
    %h3 Ingredients 
    #ingredients 
     = f.simple_field_for :ingredients do |ingredient| #this is the line throwing the error 
     = render 'ingredients_fields', f: ingredient 
     .links 
     = link_to_add_association 'Add Ingredient', f, :ingredients, class: 'btn btn-default add-button' 

部分文件引发错误：_form.html.haml

= simple_form_for @recipe, html: { multipart: true } do |f| 
    - if @recipe.errors.any? 
     #errors 
      %p 
      = @recipe.errors.count 
      Prevented this recipe from saving. 
      %ul 
      - @recipe.errors.full_messages.each do |msg| 
      %li= msg 
    .panel-body 
     = f.input :title, input_html: { class: 'form-control' } 
     = f.input :description, input_html: { class: 'form-control' } 
     = f.input :image, input_html: { class: 'form-control' } 

     .row 
      .col-md-6 
      %h3 Ingredients 
      #ingredients 
       = f.simple_field_for :ingredients do |ingredient| 
       = render 'ingredients_fields', f: ingredient 
       .links 
       = link_to_add_association 'Add Ingredient', f, :ingredients, class: 'btn btn-default add-button' 

    = f.button :submit, class: 'btn btn-primary' 

成份场部分：_ingredients_fields.html.haml

.form-inline.clearfix 
    .nested-fields 
     = f.input :name, input_html: { class: 'form-input form-control' } 
     = link_to_remove_association "Remove", f, class: 'form-button btn btn-default' 

再次，让我知道是否需要包含任何其他文件。谢谢！

Answer 1

其simple_fields_for而不是simple_field_for。您缺少s。

阅读Simple Form Documentation了解更多信息。