Parse: Check if object exists before fetch

Question

I have a column of type array. It stores pointers to other objects. So in my loop I have something like this:

foreach ($artworkArr as $a) {
    $a->fetch();
    $artworkName[] = $a->get('title');
}

Problem here is, fetch immediately throws an exception if the pointer points to an invalid object.

How can I check if the object exists before calling the fetch method?

hsz · Accepted Answer · 2015-06-17 08:08:34Z

1

Just try with:

foreach ($artworkArr as $a) {
    if ($a instanceof ExpectedClass) {
        $a->fetch();
        $artworkName[] = $a->get('title');
    }
}

Or if you don't know the ExpectedClass, you can use method_exists on the $a object:

method_exists($a, 'fetch')

answered Jun 17, 2015 at 8:08

hsz

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