Rails:使用嵌套模型访问表单的参数 [英] Rails: Access params of a form with a nested model

问题描述

我有以下型号

class GymUser < ActiveRecord::Base
  belongs_to :user 
  belongs_to :gym 
end

class User < ActiveRecord::Base
  has_many :gym_users
  has_one :gym

  attr_accessible :gym_users_attributes, :gym_users
  accepts_nested_attributes_for :gym_users
end

我有一个新用户的表单，带有嵌套模型Gym_user.我想确保用户不存在.这就是我正在尝试的:

I have a form for a new user, with a nested model gym_user. I want to make sure the user doesn't exist already. This is what I'm trying:

def create_member
  @user = User.new(params[:user])
  @user.generate_password
  @dupe = User.find_all_by_email(@user.email)
  if(@dupe)
    @gym_user = GymUser.new(params[:user][:gym_users_attributes])
    @gym_user.user_id = @dupe.id
  elsif @user.save
    @gym_user = @user.gym_users.order('created_at DESC').first
    @gym = Gym.find(@gym_user.gym_id)
  end
end

我知道这里只有一个嵌套模型，但是我不知道如何访问那些嵌套参数.

I know there's only one nested model here, but I can't figure out how to access those nested parameters.

这是表格本身

<%= form_for @user, :as => :user, :remote => true, :url => { :controller => 'users', :action => 'create_member'} do |f| %>
    <table border="0" cellpadding="10" cellspacing="0">
        <tr>
            <td colspan="2">
                <%= f.label :name %><br />
                <%= f.text_field :name %>
            </td>
            <td colspan="2">
                <%= f.label :email %><br />
                <%= f.text_field :email %>
            </td>
        </tr>
        <% f.fields_for :gym_users do |builder| %>
            <tr>
                <td>
                    <%= builder.label :role_id, "Role" %><br />
                    <%= builder.collection_select(:role_id, @roles, :id, :name, {:include_blank => true}, {:onchange => "new_member_role_changed()"}) %>
                    <%= builder.hidden_field :gym_id, :value => @gym.id %>
                </td>
                <td>
                    <%= builder.label :item_id, "Membership Level" %><br />
                    <%= builder.collection_select(:item_id, @gym.membership_items, :id, :name, {:include_blank => true}) %>
                </td>
                <td>
                    <%= builder.label :has_monthly_billing, "Recurring Billing?" %><br />
                    <%= builder.radio_button :has_monthly_billing, "1" %>Yes &nbsp;
                    <%= builder.radio_button :has_monthly_billing, "0" %>No
                </td>
                <td>
                    <%= builder.label :billing_date %><br />
                    <%= builder.collection_select(:billing_date, (1..31).to_a, :to_s, :to_s, {:include_blank => true}) %>
                </td>
            </tr>
            <tr>
                <td colspan="4">
                    <%= f.submit %>
                    <a href="javascript:close_new_member()">Cancel</a>
                </td>
            </tr>
        <% end %>
    </table>
<% end %>

推荐答案

我找到了答案.我不确定这是否是最好的方法，但是它能起作用

I found the answer. I'm not sure if this is the best way but it works

params[:user][:gym_users_attributes].values.first

这篇关于Rails:使用嵌套模型访问表单的参数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！