Rails 应用程序中的嵌套表单错误

Question

与此问题相关的模型：用户、朋友、兴趣、person_interest。 Person_interest 是多态的，可以存储属于用户或朋友的兴趣。

兴趣预先填充了大约。 30个兴趣。当用户注册时，他们被要求选择自己的兴趣，然后在表格下方输入他们的朋友姓名选择该人的兴趣。

尝试通过<%= friend_f.input :interests, :as => :check_boxes, :label => false %>实现这一目标

但出现以下错误：

NoMethodError in User_steps#show

Showing /Users/nelsonkeating/Desktop/ReminDeal/app/views/user_steps/show.html.erb where line #30 raised:

undefined method `to_i' for []:ActiveRecord::Relation
Extracted source (around line #30):

27:         :end_year => Date.today.year - 12,
28:         :order => [:month, :day, :year ] %>
29:       <%= friend_f.input :gender, :collection => ['male','female'] %>
30:       <%= friend_f.input :interests, :as => :check_boxes, :label => false %>
31:     <%end%>
32:   
33: 
Rails.root: /Users/nelsonkeating/Desktop/ReminDeal

Application Trace | Framework Trace | Full Trace
app/views/user_steps/show.html.erb:30:in `block (2 levels) in _app_views_user_steps_show_html_erb__1202886937753978667_70281885932700'
app/views/user_steps/show.html.erb:23:in `block in _app_views_user_steps_show_html_erb__1202886937753978667_70281885932700'
app/views/user_steps/show.html.erb:1:in `_app_views_user_steps_show_html_erb__1202886937753978667_70281885932700'
Request

Parameters:

{"id"=>"show"}

这是表格..

<%= simple_form_for @user do |f| %>

  <%= f.input :name %>
  <%= f.input :city %>
  <%= f.input :address, :live => true  %>
  <%= f.input :zipcode %>
  <%= f.input :date_of_birth, :as => :date, :start_year => 1900,
    :end_year => Date.today.year - 12,
    :order => [ :day, :month, :year] %>
  <%= f.input :gender, :collection => [:male, :female] %>


    <h4>Select your top 3 interests..</h4>
      <%= f.association :interests, :as => :check_boxes, :label => false %>

    <h4>What holidays do you celebrate?</h4>
      <%= f.association :holidays, :as => :check_boxes, :label => false %> 



<h4>Add up to 10 friends birthdays that you would like to remember..</h4>
    <%= f.simple_fields_for :friends do |friend_f| %>

      <%= friend_f.input :name %>
      <%= friend_f.input :dob, :label => :Birthday, :as => :date, :start_year => Date.today.year - 90,
        :end_year => Date.today.year - 12,
        :order => [:month, :day, :year ] %>
      <%= friend_f.input :gender, :collection => ['male','female'] %>
      <%= friend_f.input :interests, :as => :check_boxes, :label => false %>
     <%end%>


 <%= f.button :submit, :class => 'btn btn-success' %>
      <%end%>

Git 仓库在这里：https://github.com/nelsonkeating/ReminDeal

Answer 1

你有什么理由回避friend_f.association？

<%= friend_f.association :interests, :as => :check_boxes, :label => false %>

为我工作。 或者在 kasper 的代码中将:interests 更改为:interest_ids，也应该可以工作。

<%= friend_f.input :interest_ids, :as => :check_boxes, :label => false, :collection => Interest.all %>

Answer 2

尝试使用:collection 键编写代码<%= friend_f.input :interests, :as => :check_boxes, :label => false %>。 例如：

<%= friend_f.input :interests, :as => :check_boxes, :label => false, :collection => Interest.all %>