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I'm creating a custom twig filter in Craft 3 and am struggling with a really simple thing.
{{ entry.backgroundImage.one() | filter }}
In my filter, I would like to validate that I am being passed an asset.
if (!$asset instanceof Asset)
{
return false;
}
What should I be checking the object against? Asset or something different?
Actually, you had your code just right imo:
use craft\elements\Asset;
...
if (!$asset instanceof Asset) {
return false;
}
use craft\elements\Asset; which would have made the original code work. Thanks!
get_class and instanceof, a useful detail to know is that instanceof will also return true for a class extending the class you're testing against (i.e. your conditional will evaluate to true if you pass it an object w/ a class extending Asset, which may or may not be what you want), where get_class($object) === 'SomeClass' will only evaluate to true if the object actually has that particular class. In this case, I'm fairly positive it doesn't matter and both approaches will work.
Jul 23 '18 at 8:38
use craft\elements\Asset; ... if (\get_class($asset) === Asset::class) { ... of course :)
Jul 23 '18 at 8:39
Assuming you're using Craft 3, this should work:
if (\get_class($asset) !== 'craft\elements\Asset) {
return false;
}
