Question

I got a model called Pages that looks like this:

title
description
image_id
background_image
logo

I also got a model calles Images that looks like this:

id
title

What I would like to be able to is to associate these three fields with the image model.

image_id
background_image
logo

image_id works perfectly because of the Page model association:

has_many :images

How do I make it work with background_image and logo?
Hope my question makes any sense. Thanks

UPDATE

Answer 1

In your Page model, you’ll want to use belongs_to to specify that it contains a pointer to an Image. For the first one, that’ll just be belongs_to :image.

But you want to have three pointers. You can do that; for each of the other fields, you’ll add an option to belongs_to to specify that it’s pointing to an Image. You do that using the :class_name option, like this;

belongs_to :logo, :class_name => 'Image'

You’ll also probably want to name your columns with _id at the end, so background_image_id and logo_id – it’s more Railsy that way.

All of this is documented in the Rails Guides; the :class_name option is specifically here.