/**
* Privately used by _extract_related_model_info_from_query_param to add a join to $model_name
* and store it on $passed_in_query_info
* @param string $model_name
* @param EE_Model_Query_Info_Carrier $passed_in_query_info
* @param string $original_query_param used to extract the relation chain between the queried model and $model_name.
* Eg, if we are querying Event, and are adding a join to 'Payment' with the original query param key 'Registration.Transaction.Payment.PAY_amount',
* we want to extract 'Registration.Transaction.Payment', in case Payment wants to add default query params so that it will know
* what models to prepend onto its default query params or in case it wants to rename tables (in case there are multiple joins to the same table)
* @return void
*/
private function _add_join_to_model($model_name, EE_Model_Query_Info_Carrier $passed_in_query_info, $original_query_param)
{
$relation_obj = $this->related_settings_for($model_name);
$model_relation_chain = EE_Model_Parser::extract_model_relation_chain($model_name, $original_query_param);
//check if the relation is HABTM, because then we're essentially doing two joins
//If so, join first to the JOIN table, and add its data types, and then continue as normal
if ($relation_obj instanceof EE_HABTM_Relation) {
$join_model_obj = $relation_obj->get_join_model();
//replace the model specified with the join model for this relation chain, whi
$relation_chain_to_join_model = EE_Model_Parser::replace_model_name_with_join_model_name_in_model_relation_chain($model_name, $join_model_obj->get_this_model_name(), $model_relation_chain);
$new_query_info = new EE_Model_Query_Info_Carrier(array($relation_chain_to_join_model => $join_model_obj->get_this_model_name()), $relation_obj->get_join_to_intermediate_model_statement($relation_chain_to_join_model));
$passed_in_query_info->merge($new_query_info);
}
//now just join to the other table pointed to by the relation object, and add its data types
$new_query_info = new EE_Model_Query_Info_Carrier(array($model_relation_chain => $model_name), $relation_obj->get_join_statement($model_relation_chain));
$passed_in_query_info->merge($new_query_info);
}
