如何在Laravel中驗證輸入字段的值是否爲空

Question

我試圖用laravel創建並更新用戶5.4

這是爲創建用戶添加的驗證。有用。

$this->validate($request, [ 
    'name' => 'required|max:255', 
    'email' => 'required|email|max:255|unique:users', 
    'password' => 'required|min:6|confirmed', 
]); 

更新密碼字段不是必需的。但如果密碼字段不爲空，則驗證min：6並確認規則。與sometimes試過..但沒有工作..

$this->validate($request, [ 
    'name' => 'required|max:255', 
    'email' => 'required|email|max:255|unique:users,email,'.$id, 
    'password' => 'sometimes|min:6|confirmed', 
]); 

Answer 1

嘗試使用可爲空值作爲一項規則

'password' => 'nullable|min:6|confirmed', 

看到https://laravel.com/docs/5.4/validation#a-note-on-optional-fields

Answer 2

創建基於密碼字段規則。僅當密碼字段存在時纔有效。

if ($request->input('password')) { 
    $rules = [ 
     'name' => 'required|max:255', 
     'email' => 'required|email|max:255|unique:users,email,'.$id, 
     'password' => 'required|min:6|confirmed', 
    ]; 
} else { 
    $rules = [ 
     'name' => 'required|max:255', 
     'email' => 'required|email|max:255|unique:users,email,'.$id 
    ]; 
} 

$this->validate($request, $rules); 

Answer 3

這是我會怎麼做：

//For new or create : 
$this->validate($request, [ 
    'name' => 'required|max:255', 
    'email' => 'required|email|max:255|unique:users', 
    'password' => 'required|min:6|confirmed', 
]); 

//For edit or update: 
$this->validate($request, [ 
    'name' => 'required|max:255', 
    'email' => 'required|email|max:255|unique:users', 
    'password' => 'min:6|confirmed',//just remove required from password rule 
]); 

說明：
這樣，該值將在請求才能通過驗證時，它會被定義（目前）
如果您使用可爲空，比驗證器將接受null作爲值（我假設是n ot accepted）
如果您刪除密碼驗證從此更新比這個輸入將不會被驗證，任何值將被接受（這是再次不能接受）;