Question

Just playing around RoR, trying to find a way through some modelling.
Please, mind the code below:

 class Picture < ActiveRecord::Base
      belongs_to :imageable, :polymorphic => true
 end

 class Employee < ActiveRecord::Base
      has_many :pictures, :as => :imageable
 end

 class Product < ActiveRecord::Base
      has_many :pictures, :as => :imageable
 end

Is there a way to get a Product by its specific Picture?
I’m trying this, but its not working:

picure = Picture.last
product = Product.where(picture: picure)

Its failing with:

SQLite3::SQLException: no such column: products.picture: SELECT "products".*
FROM "products" WHERE "products"."picture" IS NULL LIMIT 1```

Answer 1

If you have an instance of Picture @picture, you can use the belongs_to to get it’s associated Product (assuming it the Picture is in fact belonging to an instance of Product and not Employee)

product = @picture.imageable