[5.3] Illuminate\Validation\Rules\Unique bug fix

[MrAtiebatie]

With the new validation rules since Laravel 5.3 the following validation fails:

Rule::unique('users', 'name')->ignore('Taylor, Otwell', 'name')

When it's parsed in the underneath method in Illuminate\Validation\Validator, comma separated arguments will be seen as a separate column, because of the str_getcsv. This causes an error on line 1520.

protected function parseParameters($rule, $parameter)
{
    if (strtolower($rule) == 'regex') {
        return [$parameter];
    }

    return str_getcsv($parameter);
}

I solved it with the following PR. Perhaps not the most beautiful approach, so let me know what you think.

[taylorotwell]

Will this still work for boolean arguments or NULL?

[MrAtiebatie]

NULL argument, yes, boolean arguments, no. But I'm not sure if it's necessary to check if the database has an unique boolean value? I completed the test some more.