Question

我有两个控制器，一个是project_controller.rb，另一个是service_controller.rb。所以我想将services_ids存储到project。

代码project_controller.rb

def get_service_list
  @project = Project.find(params[:project_id])
end

project.rb型号代码

class Project < ActiveRecord::Base
  attr_accessible :name, :services_ids, :user_id, :vendor_id
  has_many :services
end

代码service.rb模型

class Service < ActiveRecord::Base
  attr_accessible :name, :vendor_id
  belongs_to :project
end

代码get_service_list.html.erb

<%= form_for(@project) do |f| %>
  <%= f.collection_check_boxes :services_ids, Service.all, :id, :name %>
  <%= f.submit %>
<% end %>

但它抛出此错误undefined method collection_check_boxes for #<ActionView::Helpers::FormBuilder:0x9e996d0>

我关注了Stackoverflow和Rails API个链接

完整错误堆栈

NoMethodError in Projects#get_service_list

Showing /home/test/ROR/vms/app/views/projects/get_service_list.html.erb where line #5 raised:

undefined method `collection_check_boxes' for #<ActionView::Helpers::FormBuilder:0xacdc9b8>

Extracted source (around line #5):

2: 
3:    
4:    <!-- %= collection_check_boxes(:projects, :services_ids,Service.all, :id, :name) % -->
5:    <%= f.collection_check_boxes :projects, :services_ids, Service.all, :id, :name_with_initial %>
6:    
7:    <%= f.submit %>
8: 

Rails.root: /home/test/ROR/vms
Application Trace | Framework Trace | Full Trace

app/views/projects/get_service_list.html.erb:5:in `block in _app_views_projects_get_service_list_html_erb___693653039_90594350'
app/views/projects/get_service_list.html.erb:1:in `_app_views_projects_get_service_list_html_erb___693653039_90594350'

请帮助..提前致谢

Answer 1

这是因为您正在使用 Rails 3。

collection_check_boxes_tag是introduced in Rails 4。对于您目前的使用，您必须遍历您的集合Service.all，并为每个对象设置一个复选框：

<%= form_for(@project) do |f| %>
  <% for service in Service.find(:all) %>
    <%= check_box_tag "project[services_ids][]", service.id %>
    <%= service.name %>
  <% end %>
  <%= f.submit %>
<% end %>

您还可以参考Ryan Bates for Checkboxes精彩的RailsCast。

collection_check_boxes无法正常工作抛出未定义的方法错误（Ruby on Rails）

1 个答案: