/**
* @param $onTableAliasName
* @return null|string
*/
protected function resolveJoinsForForARelationAttributeThatIsManyToMany($onTableAliasName)
{
assert('is_string($onTableAliasName)');
$relationTableName = $this->modelAttributeToDataProviderAdapter->getRelationTableName();
$attributeTableName = $this->modelAttributeToDataProviderAdapter->getAttributeTableName();
$relationJoiningTableAliasName = $this->joinTablesAdapter->addLeftTableAndGetAliasName($this->modelAttributeToDataProviderAdapter->getManyToManyTableName(), "id", $onTableAliasName, self::resolveForeignKey($attributeTableName));
//if this is not the id column, then add an additional left join.
if ($this->modelAttributeToDataProviderAdapter->getRelatedAttribute() != 'id') {
$this->resolveSetToDistinct();
return $this->joinTablesAdapter->addLeftTableAndGetAliasName($relationTableName, self::resolveForeignKey($relationTableName), $relationJoiningTableAliasName, 'id');
} else {
return $relationJoiningTableAliasName;
}
}
