Schema Metatag uses empty() all over the place. This keeps things clean in many cases, but also removes all uses of "0" in the default values form.
This makes something as free shipping with Googles example impossible when using default values:
"shippingDetails": {
"@type": "OfferShippingDetails",
"shippingRate": {
"@type": "MonetaryAmount",
"value": "0",
"currency": "USD"
},
1. clean install and enable modules
2. enter "0" as a default value in a Schema Metatag field and save.
3. re-open and it's gone.
Change public static function arrayTrim($array) in SchemaMetatagManager.php from:
if (empty($value)) {
to
if (empty($value) && $value !=0 ) {
Does every $form['#default_value'] need to be checked for an empty value?;
$form['#default_value'] = !empty($value) ? $value : '';
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I have resolved the issue as Proposed resolution & patch added, please review.