Ruby on Rails:使用一种表单和一种提交方式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，客户和项目.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的报价，一个新的客户和一个新的项目.我查看了其他问题和相关内容，或者它们不适用于我的情况，或者我不知道如何实现它们.

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

customer.rb

customer.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

我的引号表格/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

因此，要尝试修复它，我在quote.rb中更新了attr_accessible，使其包括:item，:customer，但随后出现此错误:

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级，您需要使用

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上对其进行声明(在您的情况下，它看起来像是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，您需要确保声明可以访问的属性 您可以避免其他批量分配错误.

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

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