在变形模型上的急切负载关系

Question

Say I have a model that morphs a number of different models (using morphTo). I'm trying to achieve that whenever a model is morphed, all (or some) relations on that morphed model are eager loaded too.

Example code here: http://laravel.io/bin/yLyz7

Whenever I'd call:

Index::with('item')->get();

It will eventually result in a query like so for the morph:

SELECT * FROM sample_items WHERE id IN (?, ?, ?)

This is exactly what I want, but I also want to eager load any relations on the SampleItem models, so that instead of querying the relation for each SampleItem every time, it would also create a query like this. Assuming SampleItem has a "user" relation.

SELECT * FROM users WHERE id IN (?, ?, ?)

Is there any way to achieve this? Because I'm not calling the SampleItem model myself, I can't specify any eager loaded relations. I assume I'd have to specify this in the relation on Index, but I can't figure out how. I'm not sure this is even currently possible.

Answer 1

Turns out to be easier than I thought. Seems like specifying the "with" property on the SampleItem model takes care of this:

/**
 * The relations to eager load on every query.
 *
 * @var array
 */
protected $with = ['user'];