Ruby on Rails:用一个表单和一个提交为多个模型创建记录 [英] Ruby on Rails: create records for multiple models with one form and one submit

问题描述

我有 3 个模型:报价、客户和商品.每个报价都有一个客户和一个项目.当我按下提交按钮时，我想在各自的表中创建一个新报价、一个新客户和一个新项目.我查看了其他问题和 railscasts，要么它们不适合我的情况，要么我不知道如何实施它们.

I have a 3 models: quote, customer, and item. Each quote has one customer and one item. I would like to create a new quote, a new customer, and a new item in their respective tables when I press the submit button. I have looked at other questions and railscasts and either they don't work for my situation or I don't know how to implement them.

quote.rb

class Quote < ActiveRecord::Base
  attr_accessible :quote_number
  has_one :customer
  has_one :item
end

客户.rb

class Customer < ActiveRecord::Base
  attr_accessible :firstname, :lastname
  #unsure of what to put here
  #a customer can have multiple quotes, so would i use has_many or belongs_to?
  belongs_to :quote
end

item.rb

class Item < ActiveRecord::Base
  attr_accessible :name, :description
  #also unsure about this
  #each item can also be in multiple quotes
  belongs_to :quote

quotes_controller.rb

quotes_controller.rb

class QuotesController < ApplicationController
  def index
    @quote = Quote.new
    @customer = Customer.new
    @item = item.new
  end

  def create
    @quote = Quote.new(params[:quote])
    @quote.save
    @customer = Customer.new(params[:customer])
    @customer.save
    @item = Item.new(params[:item])
    @item.save
  end
end

items_controller.rb

items_controller.rb

class ItemsController < ApplicationController
  def index
  end

  def new
    @item = Item.new
  end

  def create
    @item = Item.new(params[:item])
    @item.save
  end
end

customers_controller.rb

customers_controller.rb

class CustomersController < ApplicationController
  def index
  end

  def new
    @customer = Customer.new
  end

  def create
    @customer = Customer.new(params[:customer])
    @customer.save
  end
end

我的报价单/new.html.erb

my form for quotes/new.html.erb

<%= form_for @quote do |f| %>
  <%= f.fields_for @customer do |builder| %>
    <%= label_tag :firstname %>
    <%= builder.text_field :firstname %>
    <%= label_tag :lastname %>
    <%= builder.text_field :lastname %>
  <% end %>
  <%= f.fields_for @item do |builder| %>
    <%= label_tag :name %>
    <%= builder.text_field :name %>
    <%= label_tag :description %>
    <%= builder.text_field :description %>
  <% end %>
  <%= label_tag :quote_number %>
  <%= f.text_field :quote_number %>
  <%= f.submit %>
<% end %>

当我尝试提交时出现错误:

When I try submitting that I get an error:

Can't mass-assign protected attributes: item, customer

所以为了尝试修复它，我更新了 quote.rb 中的 attr_accessible 以包含 :item, :customer 但随后我收到此错误:

So to try and fix it I updated the attr_accessible in quote.rb to include :item, :customer but then I get this error:

Item(#) expected, got ActiveSupport::HashWithIndifferentAccess(#)

任何帮助将不胜感激.

推荐答案

要提交表单及其关联的子项，您需要使用 accepts_nested_attributes_for

To submit a form and it's associated children you need to use accepts_nested_attributes_for

为此，您需要在要使用的控制器的模型中声明它(在您的情况下，它看起来像 Quote Controller.

To do this, you need to declare it at the model for the controller you are going to use (in your case, it looks like the Quote Controller.

class Quote < ActiveRecord::Base
  attr_accessible :quote_number
  has_one :customer
  has_one :item
  accepts_nested_attributes_for :customers, :items
end

此外，您需要确保声明哪些属性可访问您可以避免其他质量分配错误.

Also, you need to make sure you declare which attributes are accessible so you avoid other mass assignment errors.

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