protected function createConditionsFromKeys(Model $model, $conditionKeys = array(), $valueKeys = array())
{
$conditionString = implode('_and_', $conditionKeys);
$conditionValues = array_values($model->getValuesFor($valueKeys));
// return null if all the foreign key values are null so that we don't try to do a query like "id is null"
if (all(null, $conditionValues)) {
return null;
}
$conditions = SQLBuilder::createConditionsFromUnderscoredString(Table::load(get_class($model))->conn, $conditionString, $conditionValues);
# DO NOT CHANGE THE NEXT TWO LINES. add_condition operates on a reference and will screw options array up
if (isset($this->options['conditions'])) {
$optionsConditions = $this->options['conditions'];
} else {
$optionsConditions = array();
}
return Utils::addCondition($optionsConditions, $conditions);
}
