Ruby on Rails - grouped_collection_select错误

时间:2016-04-20 10:07:06

标签: javascript ruby-on-rails ruby

我正在学习Ruby on Rails,但仍然不熟悉该语言的某些部分。使用grouped_collection_select我试图过滤特定品牌汽车的所有相关模型...

我不确定groups_collection_select是否具有正确的参数,以及它们是否按正确的顺序排列,因为我遇到此错误并且似乎无法解决它:"未定义的方法`map' for" 3 Series":String"。

此外,我正在使用此railscast,并已将Javascript添加到相关文件中。

应用\ views_multi_search.html.erb

  
<%= select_tag ('make_id'), 
        options_from_collection_for_select(@makes, :id, :makes_info, 0 ),
        :prompt => "Select a Make" %>
<%#= select_tag ('model_id'), 
    options_from_collection_for_select(@models, :id, :model_info, 0 ),
    :prompt => "Select a Model" %>

<%= select_tag ('model_id'), grouped_collection_select(:model,:model_id,Model.all,:model_info,:model,:id,:model),:prompt => "Select a Model" %>

在application.html.erb中调用partial:

`

<%= render( :partial => '/multi_search', 
            :locals => {
            :makes => @makes = Make.all,:models => @models = Model.all,
            :my_path => '/cars/multi_find' })%>'

品牌和汽车模型的型号代码:

make.rb

class Make < ActiveRecord::Base

    has_many :cars
    has_many :model

模型:RB

has_many :cars
    belongs_to :make

    has_many :cars
    belongs_to :make

任何帮助将不胜感激!

谢谢

1 个答案:

答案 0 :(得分:0)

您需要做的一件事就是在Make class write

has_many :models

而不是

has_many :model