CODEWITHSUNDEEP
phplaravellaravel-4eloquentrelationship
andrewtweber
andrewtweber

Reputation: 25549

Call to undefined method Illuminate\Database\Query\Builder::getMorphClass()

DB structure:

items ( id, ... )
photos ( id, ... )
comments ( id, entity_id, entity_type )

where entity_type is an ENUM ('Item', 'Photo')

Models:

class Item extends Eloquent {
  public function comments() {
    return $this->morphMany('Comment', 'entity');
  }
}
class Photo extends Eloquent {
  // same as Item
}
class Comment extends Eloquent {
  public function entity() {
    return $this->morphTo();
  }
}

For some reason when I try this:

$comments = $item->comments()->orderBy('created_at', 'asc')->get();

I get this error.

Call to undefined method Illuminate\Database\Query\Builder::getMorphClass()

It seems like it's trying to use the Query Builder instead of MorphOneOrMany, which does have getMorphClass defined. But even if I simply do $item->comments without any further query building, it gives the same error.

Upvotes: 0

Views: 1314

Answers (2)

hannesvdvreken
hannesvdvreken

Reputation: 4988

Here's the documentation on Polymorphic relations: http://laravel.com/docs/4.2/eloquent#polymorphic-relations

If I understand correctly, a comment can be used on an Item or a Photo. The models you pasted were setup correctly for that.

In order to sort relationships you can use a closure like this:

$item = Item::with(array('comments' => function ($query) {
    $query->orderBy('created_at');
}))->find($id);

// These will be sorted:
$item->comments;

Upvotes: 1

andrewtweber
andrewtweber

Reputation: 25549

Here is my temporary solution

class Item extends Eloquent {
  public function comments() {
    return $this->hasMany('Comment', 'entity_id')
      ->where('entity_type', '=', 'Item');
  }
}

I would really prefer to use morphMany though.

Upvotes: 0

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