有很多通过复选框不保存值 Rails3 [英] Has Many Through Checkboxes Not Saving Values Rails3

问题描述

我已经在我的数据库中建立了一个 has_many through 关系并更改了密钥，因为我正在使用旧数据库.

I've set up a has_many through relationship in my db and changed the keys because I'm working with a legacy db.

似乎一切正常，但我无法将复选框保存到数据库中.

It all seems to be working but I cannot get the checkboxes to save to the database.

我的模型如下:

class Radcheck < ActiveRecord::Base
  set_table_name 'radcheck'
  attr_accessible :attribute_name, :username, :value, :op, :groupname
  belongs_to :raduser

  has_many :radusergroup, :dependent => :destroy, :primary_key => :username, :foreign_key => :groupname
  has_many :radgroupcheck, :through => :radusergroup
end


class Radgroupcheck < ActiveRecord::Base
  set_table_name 'radgroupcheck'
  has_many :radusergroup, :dependent => :destroy#, :primary_key => :groupname, :foreign_key => :username
  has_many :radcheck, :through => :radusergroup
end


class Radusergroup < ActiveRecord::Base
  belongs_to :radcheck, :foreign_key => 'groupname', :primary_key => 'username'
  belongs_to :radgroupcheck, :foreign_key => 'username', :primary_key => 'groupname'
end

在我的表单中，我有这个:

In my form, I have this:

<% Radgroupcheck.all.each do |group| -%>
  <%= check_box_tag :groupnames, group.id, @radcheck.radgroupcheck.include?(group), :username => 'radcheck[groupname][]' -%> | <%= label_tag :groupnames, group.groupname -%>
<% end -%>

表单呈现复选框正常，我可以看到组名，但是当我点击保存时没有任何反应.

The form renders the checkboxes ok and I can see the groupnames but nothing happens when I hit save.

开发日志清晰，mysql查询日志也看不到任何东西.

The development log is clear and I can't see anything in the mysql query log either.

推荐答案

试试在你的表单中使用这个:

Try using this in your form:

<% Radgroupcheck.all.each do |group| -%>
  <%= check_box_tag "radcheck[radgroupcheck_ids][]", radgroupcheck.id, @radcheck.radgroupchecks.include?(radgroupcheck), :id => "radcheck_radgroupcheck_id_#{radgroupcheck.id}" -%>
  <%= label_tag "radcheck[radgroupcheck_ids][]", radgroupcheck.name, :for => "radcheck_radgroupcheck_id_#{radgroupcheck.id}" -%>
<% end %>

在你的控制器中:

def create
  params[:radcheck][:radgroupcheck_ids] ||= []
  @radcheck = Radcheck.new(params[:radcheck])

  # rest of your controller logic
end

这是改编自在 Rails 3.1 项目中对我有用的内容，基于 http://railscasts.com/episodes/17-habtm-checkboxes?view=asciicast

This is adapted from what worked for me in a Rails 3.1 project, based on http://railscasts.com/episodes/17-habtm-checkboxes?view=asciicast

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