CODEWITHSUNDEEP
phplaravellaravel-5eloquenteager-loading
Muhaimin
Muhaimin

Reputation: 1643

Laravel5 eager loading null value

Eager loading won't work work if the field has null value. How do i escape the error

Trying to get property of non-object

and in model I set the relationship like this

public function bilstate()
{
    return $this->hasOne('App\Attribute', 'at_id', 'cu_bilstateid');
}

can someone share the experience? Thanks

Upvotes: 2

Views: 1295

Answers (1)

patricus
patricus

Reputation: 62368

For a hasOne relationship, if the related record exists, the relationship attribute will be set to an instance of the related model; if the related record does not exist, the relationship attribute will be set to null.

The eager loading is working fine, you just need to check if the related model exists before trying to access anything on it.

if ($model->bilstate) {
    echo 'bilstate exists: '.$model->bilstate->at_id;
} else {
    echo 'bilstate does not exist. Don't access attributes or you'll get an exception.';
}

Note: you can use the is_null method to check, if you'd like. However, using isset or empty is unreliable. If the relationship is not eager loaded, then the attribute will be lazy loaded using the __get() magic method. is_null will trigger this lazy load, whereas isset and empty will not.

Upvotes: 2

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