如何创建一个ActiveRecord对象，当你设置一个属性？ [英] How do you set an attribute when creating an ActiveRecord object?

问题描述

我想，我创建一个对象上设置的属性。我觉得这应该工作：

I am trying to set an attribute on an object that I am creating. I feel like this should work:

 def create
    @album = Album.new(params[:album])
    @album.user = current_user

    if @album.save
       flash[:notice] = 'Album was successfully created for ' + current_user.login + '.'
       redirect_to albums_url 
    else
       render :action => "new"
    end
  end

但似乎忽略了分配到用户字段。任何想法？

推荐答案

假设你的模型关系设置正确*，这是更好地做：

Assuming that your model relationships are set up correctly*, it's better to do:

@album = current_user.albums.build(params[:album])

＆mdash;这将正确填充 USER_ID 字段为新专辑到当前用户的ID

—This will correctly populate the user_id field for the new album to the ID of the current user.

---

*是这样的：

class User < ActiveRecord::Base
  has_many :albums
  .
  .
  .
end

class Album < ActiveRecord::Base
  belongs_to :user
  .
  .
  .
end

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