RoR-在多对多联接表上创建记录 [英] RoR - create record on many-to-many join table

问题描述

我有以下型号:

Client.rb
  has_many :establishments
  accepts_nested_attributes_for :establishments

  has_many :addressess, through: :establishments
  accepts_nested_attributes_for :addresses


Establishment.rb
  belongs_to :address
  belongs_to :client


Address.rb
  has_many :establishments 

在Client的show视图上，我创建了<%= link_to "New Establishment", new_client_address_path(@client)%>以便为客户端创建新的地址记录和新的Establishment.

On the show view of the Client I created a <%= link_to "New Establishment", new_client_address_path(@client)%> in order to create a new Address record and a new Establishment to the client.

在AddressController上，我有:

On the AddressController I have:

     def new
        @client = Client.find(params[:client_id])
        @address = @client.addresses.build
      end

  def create
    @address = Address.new(address_params)

    respond_to do |format|
     if @address.save
      format.html { redirect_to @address, notice: 'Estabelecimento criado com sucesso.' }
      format.json { render action: 'show', status: :created, location: @address }
     else
      format.html { render action: 'new' }
      format.json { render json: @address.errors, status: :unprocessable_entity }
     end
    end
   end

这将创建新的地址，但不会创建新的场所.这样可以自动创建链接Client和Address的新场所吗?在您问之前，我真的需要这个Establishment模型.

this will create the new Address but does not create the new Establishment. Can this automatically create the new Establishment that links the Client and the Address? Before you ask, I really need to have this Establishment model.

推荐答案

此处:

在您的模型中:

Client.rb
  has_many :establishments
  accepts_nested_attributes_for :establishments

  has_many :addresses, through: :establishments
  accepts_nested_attributes_for :addresses


Establishment.rb
  belongs_to :address
  belongs_to :client


Address.rb
  has_many :establishments
  has_many :clients, through: :establishments

在您的控制器中:

class AddressController < ApplicationController

  def new
    @client = Client.find(params[:client_id])
    @client.establishments.build.build_address
    # if you have a column in establishment, for example: name
    # you can do something like this to set establishment's name:
    # @client.establishments.build(name: 'First connection').build_address
  end

  # create method doesn't need to be changed!!

end

您认为:

<%= form_for(@client) do |form| %>
  <%= form.input :name %>

  <%= form.fields_for(:establishments) do |establishment_form| %>
    <% establishment = establishment_form.object.name.titleize %>
    <%= establishment_form.input :name, as: :hidden %>
    <%= establishment_form.fields_for(:address) do |address_form| %>
      <%= address_form.input :address1, label: "#{establishment} address1" %>
      <%= address_form.input :address2, label: "#{establishment} address2" %>
    <% end %>
  <% end %>

  <%= form.submit "Submit" %>
<% end %>

你们都准备好了！

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