Polymorphic relations

[babrovka]

Is there any solutions to have polymorphic relations in the model?

For example:

class Photo belongs_to :article belongs_to :event end

/articles/:id/photos/:id /event/:id/photos/:id

And have such methods for querying photos:

Photo.where(article_id: 1).find(2) Photo.where(event_id: 2).find(3)

Now, two 'belongs_to' relations in the model leads to such method: Photo.where(article_id: 1, event_id: 2).find(2) /articles/:id/event/:id/photos/:id

And if I mention only one relation in the query, it leads to ArgumentError

[chingor13]

I don't have the ability to do polymorphic relations at this time. I will think about it, but if you have suggestions, I'd love to hear them.

[JohnBDonner]

I think support for polymorphic relationships would be useful, although off the top of my head I'm also not sure how to effectively add support for this.

A temporary work-around would be to have separate models:

class Photo
  def self.table_name
    "photos"
  end
end

# get articles/:article_id/photos/:id
class ArticlePhoto < Photo
  belongs_to :article
end

# get events/:events_id/photos/:id
class EventPhoto < Photo
  belongs_to :event
end

This is can get complicated with many associations, but I think is the best way to implement this for now.