Table column filled later on - php

Question

I'm new on Laravel and as I'm playing around with it I encounter this issue.
I have a registration system which worked fine but now I wanted to add a new field in my table (description field for users).
However, this description field, I don't want to be filled when the user signs up, I want the user to fill this when he gets on his profile and updates a modal window.
The problem is, if I let that filed empty, I get an error when I sign up saying that the description filed can't be empty.
This is what I use in my UserController in order to update the description field but I'm not sure if is correct.
public function postDesc(Request $request){
$this->validate($request, [
'description' => 'required|min:20'
]);
$user = User::all();
$user->description = $request->input('description');
$user->save();
return redirect()->route('user.profile.edit');
}
This is how I opened the form:
{!! Form::open(['method' => 'PUT', 'action' => 'UserController#postDesc', 'class' => 'profile-form']) !!}

Answer 1

You use required validation rule, that's why you get the message. You should use different validation rules for register page and profile update form.
Good practice is to create two Request classes and use them for validation of two forms.

Answer 2

In this scenario, I will prefer to keep your description column nullalbe(). So it won't throw an error that description field is empty at the time of sign up.
And later you can update the description field.
public function postDesc(Request $request)
{
$this->validate($request, [
'description' => 'required|min:20'
]);
// Get the logged in user id using auth and then updating description filed
$user = User::where('user_id', Auth::id())
->update([
'description' => $request->description
]);
return redirect()->route('user.profile.edit');
}