[英]Rails Associations, habtm? Polymorphic? Both?
In my Rails app I have three models, Projects, BlogPosts and Images. 在我的Rails应用程序中,我有三个模型,Projects,BlogPosts和Images。 Projects and BlogPosts can have many linked images and an image can be linked to a Project, a BlogPost or both. Projects和BlogPosts可以有许多链接的图像,图像可以链接到Project,BlogPost或两者。
What is the best way of setting up the associations to make this work in Rails? 在Rails中设置关联以使其工作的最佳方法是什么?
I'd tease out the habtm into a separate model class, ImageLink. 我将这个问题梳理成一个单独的模型类ImageLink。 Then you'd get: 然后你会得到:
Project
has_many :image_links, :as => :resource
BlogPost
has_many :image_links, :as => :resource
ImageLink
belongs_to :image
belongs_to :resource, :polymorphic => true
Image:
has_many :image_links
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