Encore\Admin\Form::prepareUpdate PHP Method

    protected function prepareUpdate($updates)
    {
        $prepared = [];
        foreach ($this->builder->fields() as $field) {
            $columns = $field->column();
            $value = static::getDataByColumn($updates, $columns);
            if ($value !== '' && empty($value) && !$field instanceof File) {
                continue;
            }
            if (method_exists($field, 'prepare')) {
                $value = $field->prepare($value);
            }
            if ($value != $field->original()) {
                if (is_array($columns)) {
                    foreach ($columns as $name => $column) {
                        array_set($prepared, $column, $value[$name]);
                    }
                } elseif (is_string($columns)) {
                    array_set($prepared, $columns, $value);
                }
            }
        }
        return $prepared;
    }