未定義的方法`simple_field_for'爲＃<＃<Class：0x007fa76a658768>：0x007fa76a962d50>

Question

我試圖用繭寶石創建一些混合簡單窗體的嵌套窗體，當我實現窗體時，我得到Undefined method simple_field_for。我對Rails相當陌生，所以如果這是一個愚蠢的修復，我會提前道歉，但我已經掃描Stack Overflow和Google足夠長的時間，因爲我已經決定發佈並詢問。我正在遵循的教程在視圖中使用haml。以下是我的代碼，請讓我知道是否需要發佈其他信息以幫助解決錯誤。謝謝！

總計錯誤消息：

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' 

部分文件引發錯誤：_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' 

成份場部分：_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，讓我知道是否需要包含任何其他文件。謝謝！

Answer 1

其simple_fields_for而不是simple_field_for。您缺少s。

閱讀Simple Form Documentation瞭解更多信息。