问题描述
我在将raila-matchers与rails配合使用，并创建了一个名为"comments"的模型和另一个名为"post"的模型.注释是多态的.
I'm using shoulda-matchers with rails and I'm creating a model called "comments" and another model called "post". Comments is polymorphic.
当我在这样的帖子中与shoda匹配器一起测试时
When I test with shoulda matchers in post like this
it {should have_many(:comments)}
它收到此消息
在我的评论模型中，我有
In my comment model I have
belongs_to :commentable, :polymorphic => true
如何测试我的多态关联，以便帖子可以有很多评论?
How can I test my polymorphic association so that a post can have many comments?
p.s. Shoulda Matcher文档说它支持多态关联.
p.s. the shoulda matcher documentation said it supports polymorphic associations.
推荐答案
对于should它应该可以正常工作，您不需要在测试中做任何特殊的事情.确保在您的帖子模型上设置:as选项:
You shouldn't need to do anything special in your test for should it should just work. On your post model ensure sure you set the :as option:
has_many :comments, :as => :commentable
这将确保Rails使用正确的列名commentable_id和commentable_type而不是post_id.
That will ensure rails uses the proper column names commentable_id and commentable_type rather than post_id.
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