Validate POST request Laravel? - laravel

Question

I validate POST request like:
$validator = Validator::make($request->all(), [
"id.*" => 'required|integer'
]);
if ($validator->fails()) {
return response()->json($validator->errors, 400);
}
echo "Ok";
When I send request without parameter id it skips validation and returns echo "Ok";.
Why validation does not work?

Answer 1

If you expect id is array of integers you should update validation rules like this:
$validator = Validator::make($request->all(), [
"id" => 'required|array',
"id.*" => 'integer'
]);

Answer 2

First know when using $request->validate(); when it fail exceptions are raised!
And they are automatically handled by laravel. If it's a get, or a normal post form, then the process will redirect back to the form.
To note, when using the validate method during an AJAX request, Laravel will not generate a redirect response. Instead, Laravel generates a JSON response containing all of the validation errors. This JSON response will be sent with a 422 HTTP status code.
If you want to not have such an automatic behavior, create manually a validator, then you can check with ->fails() method, as the example show bellow. That's can be handful in a lot of situations.
<?php
public function store(Request $request)
{
$validator = Validator::make($request->all(), [
'title' => 'required|unique:posts|max:255',
'body' => 'required',
]);
if ($validator->fails()) {
return redirect('post/create')
->withErrors($validator)
->withInput();
}
// Store the blog post...
}
}
And there is no better then the doc itself: https://laravel.com/docs/5.7/validation
there is a lot of options, to personalize our validation process.