创建两个instancied对象之间的关联(Create association between t

我有两个型号：（相册和产品）

1）内部模型

内部album.rb：

class Album < ActiveRecord::Base
  attr_accessible :name
  has_many :products
end

内部product.rb：

class Product < ActiveRecord::Base
  attr_accessible :img, :name, :price, :quantity
  belongs_to :album
end

2）使用“ 轨道控制台 ”，哪能设定关联（所以可以用“<％= Product.first.album.name％>”）？

如

a = Album.create( :name => "My Album" )
p = Product.create( :name => "Shampoo X" )
# what's next? how can i set the album and the product together?

Answer 1:

你可以这样做：

a = Album.create( name: "My Album" )

p = Product.create( name: "Shampoo X" )
# OR
p = Product.create( name: "Shampoo X", album_id: a.id )
# OR
p.album = a
# OR
p.album_id = a.id
# OR 
a.products << a
# finish with a save of the object:
p.save

您可能需要设置访问album_id的产品型号（不知道这一点）的属性。

检查@bdares'评论也。

Answer 2:

当您创建的添加产品的关联：

a = Album.create( :name => "My Album" )
p = Product.create( :name => "Shampoo X", :album => a )

文章来源: Create association between two instancied objects