/**
* 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::$_fieldKeys = array('id' => 'membership_id', 'contact_id' => 'membership_contact_id', 'membership_type_id' => 'membership_type_id', 'join_date' => 'join_date', 'start_date' => 'membership_start_date', 'end_date' => 'membership_end_date', 'source' => 'membership_source', 'status_id' => 'status_id', 'is_override' => 'is_override', 'owner_membership_id' => 'owner_membership_id', 'max_related' => 'max_related', 'is_test' => 'member_is_test', 'is_pay_later' => 'member_is_pay_later', 'contribution_recur_id' => 'contribution_recur_id', 'campaign_id' => 'member_campaign_id');
}
return self::$_fieldKeys;
}
