How to check if a model is a single instance or a collection in yii?

Question

Yii

Good afternoon,
How to catch the difference between the two models in the code?
$model = Cars::model()->findAll(); // there can be 1 - up to infinity of entries
and
$model = Cars::model()->findByPk();
This is necessary in order - to use or not use foreach in a certain place ;

Answer 1

is_array()
But in general, if such a problem arose, then its solution is a crutch. This should not be, these are problems in the application architecture.

Answer 2

Write $models = Cars::model()->findAll();, don't you?