json_decode receives array $value on casted json value

[pitylee]

So after trying my best to implement json field without luck, I have using with array->field on the field that would be nested.

By doing this, I receive the following error:

json_decode(): Argument #1 ($json) must be of type string, array given

On HasAttribute trait fromJson method the $value is already an array.

Maybe this has something to do with the workaround I used for the flexible resolver, because the nested Flexible is sending the parent's Layout, and not a model

(Like mentioned in https://github.com/whitecube/nova-flexible-content/issues/321):

 public function set($resourceModel, $attribute, $groups)
    {
        if ($resourceModel->description ?? false) {
            $model = Model::firstOrCreate([
                'description' => $resourceModel->description,
            ]);
        }

        if (!$model) {
            return collect([]);
        }

// ...

Debug: { "message": "json_decode(): Argument #1 ($json) must be of type string, array given", "exception": "TypeError", "file": "/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php", "line": 1158, "trace": [ { "file": "/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php", "line": 1158, "function": "json_decode" }, { "file": "/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php", "line": 1114, "function": "fromJson", "class": "Whitecube\\NovaFlexibleContent\\Layouts\\Layout", "type": "->" }, { "file": "/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php", "line": 1094, "function": "getArrayAttributeByKey", "class": "Whitecube\\NovaFlexibleContent\\Layouts\\Layout", "type": "->" }, { "file": "/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php", "line": 1019, "function": "getArrayAttributeWithValue", "class": "Whitecube\\NovaFlexibleContent\\Layouts\\Layout", "type": "->" }, { "file": "/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php", "line": 907, "function": "fillJsonAttribute", "class": "Whitecube\\NovaFlexibleContent\\Layouts\\Layout", "type": "->" }, { "file": "/var/www/html/vendor/whitecube/nova-flexible-content/src/Layouts/Layout.php", "line": 451, "function": "setAttribute", "class": "Whitecube\\NovaFlexibleContent\\Layouts\\Layout", "type": "->" }, { "file": "/var/www/html/vendor/laravel/nova/src/Fields/Field.php", "line": 386, "function": "__set", "class": "Whitecube\\NovaFlexibleContent\\Layouts\\Layout", "type": "->" }, { "file": "/var/www/html/vendor/laravel/nova/src/Fields/Field.php", "line": 368, "function": "fillAttributeFromRequest", "class": "Laravel\\Nova\\Fields\\Field", "type": "->" }, { "file": "/var/www/html/vendor/laravel/nova/src/Fields/Field.php", "line": 347, "function": "fillAttribute", "class": "Laravel\\Nova\\Fields\\Field", "type": "->" }, { "file": "/var/www/html/vendor/laravel/nova/src/Fields/Field.php", "line": 321, "function": "fillInto", "class": "Laravel\\Nova\\Fields\\Field", "type": "->" }, { "file": "/var/www/html/vendor/whitecube/nova-flexible-content/src/Layouts/Layout.php", "line": 332, "function": "fill", "class": "Laravel\\Nova\\Fields\\Field", "type": "->" }, { "function": "Whitecube\\NovaFlexibleContent\\Layouts\\{closure}", "class": "Whitecube\\NovaFlexibleContent\\Layouts\\Layout", "type": "->" }, { "file": "/var/www/html/vendor/laravel/framework/src/Illuminate/Collections/Collection.php", "line": 677, "function": "array_map" }, { "file": "/var/www/html/vendor/whitecube/nova-flexible-content/src/Layouts/Layout.php", "line": 333, "function": "map", "class": "Illuminate\\Support\\Collection", "type": "->" }, { "file": "/var/www/html/vendor/whitecube/nova-flexible-content/src/Flexible.php", "line": 348, "function": "fill", "class": "Whitecube\\NovaFlexibleContent\\Layouts\\Layout", "type": "->" }, { "function": "Whitecube\\NovaFlexibleContent\\{closure}", "class": "Whitecube\\NovaFlexibleContent\\Flexible", "type": "->" }, { "file": "/var/www/html/vendor/laravel/framework/src/Illuminate/Collections/Collection.php", "line": 677, "function": "array_map" }, { "file": "/var/www/html/vendor/whitecube/nova-flexible-content/src/Flexible.php", "line": 351, "function": "map", "class": "Illuminate\\Support\\Collection", "type": "->" }, { "file": "/var/www/html/vendor/whitecube/nova-flexible-content/src/Flexible.php", "line": 308, "function": "syncAndFillGroups", "class": "Whitecube\\NovaFlexibleContent\\Flexible", "type": "->" }, { "file": "/var/www/html/vendor/laravel/nova/src/Fields/Field.php", "line": 347, "function": "fillAttribute", "class": "Whitecube\\NovaFlexibleContent\\Flexible", "type": "->" }, { "file": "/var/www/html/vendor/laravel/nova/src/Fields/Field.php", "line": 321, "function": "fillInto", "class": "Laravel\\Nova\\Fields\\Field", "type": "->" }, { "file": "/var/www/html/vendor/whitecube/nova-flexible-content/src/Layouts/Layout.php", "line": 332, "function": "fill", "class": "Laravel\\Nova\\Fields\\Field", "type": "->" }, { "function": "Whitecube\\NovaFlexibleContent\\Layouts\\{closure}", "class": "Whitecube\\NovaFlexibleContent\\Layouts\\Layout", "type": "->" }, { "file": "/var/www/html/vendor/laravel/framework/src/Illuminate/Collections/Collection.php", "line": 677, "function": "array_map" }, { "file": "/var/www/html/vendor/whitecube/nova-flexible-content/src/Layouts/Layout.php", "line": 333, "function": "map", "class": "Illuminate\\Support\\Collection", "type": "->" }, { "file": "/var/www/html/vendor/whitecube/nova-flexible-content/src/Flexible.php", "line": 348, "function": "fill", "class": "Whitecube\\NovaFlexibleContent\\Layouts\\Layout", "type": "->" }, { "function": "Whitecube\\NovaFlexibleContent\\{closure}", "class": "Whitecube\\NovaFlexibleContent\\Flexible", "type": "->" }, { "file": "/var/www/html/vendor/laravel/framework/src/Illuminate/Collections/Collection.php", "line": 677, "function": "array_map" }, { "file": "/var/www/html/vendor/whitecube/nova-flexible-content/src/Flexible.php", "line": 351, "function": "map", "class": "Illuminate\\Support\\Collection", "type": "->" }, { "file": "/var/www/html/vendor/whitecube/nova-flexible-content/src/Flexible.php", "line": 308, "function": "syncAndFillGroups", "class": "Whitecube\\NovaFlexibleContent\\Flexible", "type": "->" }, { "file": "/var/www/html/vendor/laravel/nova/src/Fields/Field.php", "line": 347, "function": "fillAttribute", "class": "Whitecube\\NovaFlexibleContent\\Flexible", "type": "->" }, { "file": "/var/www/html/vendor/laravel/nova/src/Fields/Field.php", "line": 321, "function": "fillInto", "class": "Laravel\\Nova\\Fields\\Field", "type": "->" }, { "file": "/var/www/html/vendor/laravel/framework/src/Illuminate/Collections/HigherOrderCollectionProxy.php", "line": 60, "function": "fill", "class": "Laravel\\Nova\\Fields\\Field", "type": "->" }, { "function": "Illuminate\\Support\\{closure}", "class": "Illuminate\\Support\\HigherOrderCollectionProxy", "type": "->" }, { "file": "/var/www/html/vendor/laravel/framework/src/Illuminate/Collections/Collection.php", "line": 677, "function": "array_map" }, { "file": "/var/www/html/vendor/laravel/framework/src/Illuminate/Collections/HigherOrderCollectionProxy.php", "line": 61, "function": "map", "class": "Illuminate\\Support\\Collection", "type": "->" }, { "file": "/var/www/html/vendor/laravel/nova/src/FillsFields.php", "line": 85, "function": "__call", "class": "Illuminate\\Support\\HigherOrderCollectionProxy", "type": "->" }, { "file": "/var/www/html/vendor/laravel/nova/src/FillsFields.php", "line": 35, "function": "fillFields", "class": "Laravel\\Nova\\Resource", "type": "::" }, { "file": 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