Laravel Vaidation（有时始终需要来自数据库的确切值）

Question

public static $updatePaymentRules = [
    'issue_id' => 'required|exists:ws_issues,id',
    'payment_status' => 'required|in:0,1',
    'payment_mode' => 'required|in:1,2',
    'payment_amount' => 'required|numeric',
    'payment_date' => 'required_if:payment_status,==,1|date|before:today',
    'date' => 'required_if:payment_status,==,0|date|after:today'
];

对于payment_amount，我需要类似的东西

 'payment_amount' => 'required_if:payment_status,==,1|numeric|sometimes|same_if:payment_mode,==,1:$payment'

哪里

• $ payment是可变的，它将来自数据库
• payment_status，==，1
时需要payment_amount 只有pay_mode，==，1，即全额付款时，
• payment_amount应该与$ payment完全相同
• payment_amount应为Numeric

先谢谢