Why doesn't the where method work in Laravel?

Question

Laravel

Good day, I ran into the following problem - I was developing a site on Laravel. There is a table of products, the user can review the product, after which the admin approves the review (in the review table, the 'is_approved' field becomes equal to 1, by default 0). In the database I use tinyint for the 'is_approved' field. To get all approved reviews I use the following code: where reviews is a one-to-many relationship between the product and reviews table what could be the problem? The php versions on the local machine and on the server are the same.
$this->reviews->where('is_approved', 1);
$this->reviews->where('is_approved', '1');
$reviews->where('is_approved', 1);

Answer 1

have you tried it like this return $this->reviews->where('is_approved', true);?

Answer 2

does the field have the same type on the server and in the database?