Reply To: Image Field aspect ratio rule

• John Huebner

• October 11, 2016 at 11:02 pm

There are filters in ACF that would let you do this.

You can add a custom setting using the acf/render_field_settings hook, see an example of this here https://github.com/Hube2/acf-filters-and-functions/blob/master/default-image-for-image-field.php.

There are filters in the attachment validation that you can then you to validate the image. Take a look at /api/api-helpers.php line 3839. The filters are called on line 3984.

// filter for 3rd party customization
$errors = apply_filters("acf/validate_attachment", $errors, $file, $attachment, $field);
$errors = apply_filters("acf/validate_attachment/type={$field['type']}", $errors, $file, $attachment, $field );
$errors = apply_filters("acf/validate_attachment/name={$field['name']}", $errors, $file, $attachment, $field );
$errors = apply_filters("acf/validate_attachment/key={$field['key']}", $errors, $file, $attachment, $field );