can be nullable and must be unique validation in laravel

问题

$this->validate($request, [
    'id_num' => 'required | unique:users', //this should be nullable not required with unique.
]);

Is it possible to nullable + unique at a time? then what will be the procedures?

回答1:

Simply remove the required from the validator.

Is it possible to nullable + unique at a time?

Yes

then what will be the procedures?

You don't need a procedure, declare the field as unique in the table migration.

$table->unique('id_num')->nullable();

then your validator must look like:

$this->validate($request, [
    'id_num' => 'unique:users', //this is nullable since it is not required, but it checks for unique
]);

回答2:

id_num can be nullable, if it has value then need to be unique :

$this->validate($request, [
    'id_num' => 'unique:users',
]);

Just remove the required

来源：https://stackoverflow.com/questions/62540477/can-be-nullable-and-must-be-unique-validation-in-laravel