Question

我验证来自输入的数组：

以下是我的rules和messages

$rules = [
    'fruits' => [
        'required',
        'array',
        'exists:fruits,id',
    ],
];

$messages = [
    'fruits.required' => 'Fruit is required',
    'fruits.exists' => 'Given Fruit does not exist',
];

我传递了数据库中存在的水果ID "fruits": [11, 2, 844454],数组。验证工作。当我提供不存在的水果ID（844454）时，我会Given Fruit does not exist。

如何显示给定数组中的哪个ID不存在，以便我可以在消息中显示。

赞Given Fruit 844454 does not exist？还是Given Fruit(s) 844454, 99999, 333333 do not exist？

Answer 1

在 Laravel 5.5 中，您可以像这样创建Custom Validation Rule：

namespace App\Rules;

use Illuminate\Contracts\Validation\Rule;
use Illuminate\Support\Facades\DB;

class ExistsID implements Rule
{
    protected $notExistIDs;
    protected $table;
    protected $column;

    /**
     * Create a new rule instance.
     *
     * @return void
     */
    public function __construct($table, $column)
    {
        $this->table = $table;
        $this->column = $column;
    }

    /**
     * Determine if the validation rule passes.
     *
     * @param  string $attribute
     * @param  mixed $value
     * @return bool
     */
    public function passes($attribute, $value)
    {
        $IDs = DB::table($this->table)->whereIn($this->column, $value)->pluck($this->column)->toArray();
        $this->notExistIDs = array_diff($value, $IDs);

        return count($this->notExistIDs) == 0;
    }

    /**
     * Get the validation error message.
     *
     * @return string
     */
    public function message()
    {
        return strtr("Given :table :ids does not exist", [
            ':table' => $this->table,
            ':ids' => json_encode($this->notExistIDs)
        ]);
    }
}

规则：

$rules = [
    'fruits' => [
        'required',
        'array',
        new ExistsID('fruits', 'id')
    ],
];

结果： Given fruits {\"4\":\"9999\"} does not exist

代码为different in Laravel 5.3，但您可以尝试相同的想法。快乐的编码。

Laravel 5.3 - 在验证消息中显示哪个数组项不存在？

1 个答案: