/**
* Returns an array containing, for each field, the arary key used for that
* field in self::$_fields.
*
* @return array
*/
static function &fieldKeys()
{
if (!self::$_fieldKeys) {
self::$_fieldKeys = array('id' => 'id', 'name' => 'product_name', 'description' => 'description', 'sku' => 'sku', 'options' => 'options', 'image' => 'image', 'thumbnail' => 'thumbnail', 'price' => 'price', 'currency' => 'currency', 'financial_type_id' => 'financial_type_id', 'min_contribution' => 'min_contribution', 'cost' => 'cost', 'is_active' => 'is_active', 'period_type' => 'period_type', 'fixed_period_start_day' => 'fixed_period_start_day', 'duration_unit' => 'duration_unit', 'duration_interval' => 'duration_interval', 'frequency_unit' => 'frequency_unit', 'frequency_interval' => 'frequency_interval');
}
return self::$_fieldKeys;
}
