如何在 Rails 中同时保存多个 has_many_through 对象? [英] How to save many has_many_through objects at the same time in Rails?

问题描述

我有两个相关的模型如下.

I have two models related as follows.

USERS
has_many :celebrations
has_many :boards, :through => :celebrations

BOARDS
has_many :celebrations
has_many :users, :through => :celebrations


CELEBRATIONS
:belongs_to :user
:belongs_to :board

在我的控制器中，我想从表单数据创建对象.我这样做如下:

In my controller I want to create the objects from form data. I do this as follows:

  @user = User.new(params[:user])
  @board = Board.new(params[:board])
if @user.save & @board.save    
   @user.celebrations.create(:board_id => @board,:role => "MANAGER")
   redirect_to :action => some_action
end

由于模型是由多个通过连接的，有没有办法一次性保存它们，然后一次生成错误消息，以便它们同时显示在表单上?

Since the models are joined by the many through is there a way to save them in one time and then produce the error messages at one time so that they show on the form at the same time?

推荐答案

这样就可以了

@user = User.new(params[:user])
@user.boards << @board
@user.save

这将保存用户对象和与同一命令 @user.save 关联的板对象.它还将创建中间庆祝记录并保存 user_id 和 board_id 但在您的情况下，它可能没有用，因为您需要设置庆祝表的其他列的值

This will save the user object and the board objects associated with the same command @user.save. It will create the intermediate celebrations record also with the user_id and board_id saved but in your case it might not be useful as you need to set values of other columns of celebrations table

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