How to add unique validation on combination of firstname and lastname in laravel5? - laravel-5

Question

I need to validate user table in which not repeated combination of (firstname and lastname). for example:- firstname=dc lastname=patel already exist in table. i need to prevent same entry next time.

Answer 1

Finally I have perfect solution for this.
$validationRule = ['first_name' => 'required','last_name'=>'required'];
$validationMsg = ['first_name.required' => 'First Name is required', 'last_name.required' => 'Last Name is required'];
$validation = Validator::make(['first_name' => $firstName, 'last_name' => $lastName], $validationRule, $validationMsg);
$validation->after(function ($validation) use ($firstName, $lastName) {
$checkName = User::where('first_name', $firstName)->where('last_name', $lastName)->get();
if (count($checkName) > 0) {
$validation->errors()->add('first_name', 'User already exists, please enter another user.');
}
});
if ($validation->fails()) {
foreach ($validation->errors()->all() as $error) {
$message = $error;
}
return response(\Helpers::makeAjaxResponse(false, $message));
} else {
//Save record code here
}

Answer 2

You can use something simular to composite UNIQUE key in table if database provide this possibility.
http://dev.mysql.com/doc/refman/5.7/en/multiple-column-indexes.html

Answer 3

with using laravel unique validation rule
how can you allow users with same lastname but not firstname for registeration?
unique.firstname

Answer 4

First check records count with the given firstname and lastname.
If the count is '0' save the record or else show message.
Here is some code hint
$users = DB::table('users')
->where(['firstname' => 'dc', 'lastname' => 'patel'])
->count();
if($users === 0) {
// save the record.
} else {
// Show message
}

Answer 5

Since Laravel 5.5 you can use elegant Rule class like:
use Illuminate\Validation\Rule;
// ...
$firstNameUniqueRule = Rule::unique('users')->where('last_name', request()->get('last_name', ''));
$rules = [
'first_name' => ['required', $firstNameUniqueRule],
'last_name' => 'required',
];