How to protect against value substitution in select?

Question

Laravel

Controller: View: View from all this renders like this:
$categories = Category::pluck('title', 'id');
{{ Form::select('category', $categories) }}

<select name = 'category'>
<option value = "1">Technologoies</option>
<option value = "2">Programming</option>
</select>

The user can take and replace value with any number, and it will end up in the post table, the category_id column as the number that the user entered and which, in principle, does not exist in the category table. How to deal with it? In Request, check the value, is there such an ID in the Category table?

Answer 1

data is validated before being sent to the database