Laravel 表单验证使用 2 个字段的最大字符数

Question

我有一个简单的注册表单，我使用此验证来创建新用户

   $validator = Validator::make($request->all(), [
        'first_name' => ['required'],
        'last_name' => ['required'],
        'phone' => ['required', 'string', 'max:255'],
        'email' => ['required', 'string', 'email', 'max:255', 'unique:users'],
        'password' => ['required', 'string', 'min:8', ],
        
    ]);

    if ($validator->fails()) {
        return response()->json(['message' => 'Errors!','errors'=>$validator->errors()], 500);
    }else{
        return response()->json(['message' => 'User registered successfully'], 201);

    }

现在我需要制定一个验证规则，将姓氏和名字组合在一起并验证最大字符数

Answer 1

编写 Laravel 自定义验证规则

<?php

namespace App\Rules;

use Closure;
use Illuminate\Contracts\Validation\DataAwareRule;
use Illuminate\Contracts\Validation\ValidationRule;
use Illuminate\Support\Str;

class FullNameMaxCharactor implements ValidationRule, DataAwareRule
{
    protected $requestData=null;
    /**
     * Run the validation rule.
     *
     * @param  \Closure(string): \Illuminate\Translation\PotentiallyTranslatedString  $fail
     */
    public function validate(string $attribute, mixed $value, Closure $fail): void
    {


        $fullNameCharacters= Str::length(data_get($this->requestData,'first_name').data_get($this->requestData,'last_name'));


        if ($fullNameCharacters>10) {

            $fail('The first and last name should be less than equal to 10.');
        }

    }

    public function setData(array $data)
    {
       $this->requestData=$data;

        return $this;
    }
}

以及验证规则中

 $validation=\Illuminate\Support\Facades\Validator::make($request->all(),[
        'first_name' => ['required',new \App\Rules\FullNameMaxCharactor()],
        'last_name' => ['required'],
        'phone' => ['required', 'string', 'max:255'],
    ]);