Laravel只有在满足某些条件的情况下才能加上alpha_num

Question

如果$this->language()返回en，如何仅将alpha_num添加到验证中？

public function rules()
{
return [
'title' => ['required', 'alpha_num'],
];
}
public function language()
{
// For brevity I only return "en", it could be other languages
return 'en';
}

Answer 1

use IlluminateValidationRule;
public function rules()
{
return [
'title' => ['required', Rule::when($this->language() === 'en', ['alpha_num'])],
]; 
}