How to increase value in base by 1?

Question

Laravel

There was a need to update the database, and add + 1 to one field (well, or the value that I will change dynamically)

$book = CardModel::where('number_card', $id)->first();
        $ff = 1;
        $book->count_cup ++;
        $book -> save();

This is how it adds +1 every round of the query, but if I write + 1 or + some variable it won't add (
Here are my migrations

$table->id();
$table->string('number_card') ;
$table->integer('count_cup')->default('0');
$table->string('coffee_bar_name')->default('Test');

Answer 1

$model->increment();

Answer 2

It doesn't work because the event handler is not set via jQuery. Hence the solution - to create and dispatch the event manually.
Instead we write like this:$('select').val('ru').trigger('click');

$('select').val('ru')[0].dispatchEvent(new Event('change'));