Laravel选择字段验证

use Illuminate\Http\Request;

public function store(Request $request)
{
    $request->validate([
        'category' => 'required|in:books,electronics,clothing',
        'price' => 'required|numeric|min:0',
    ]);

    // 处理验证通过的数据
}

@if ($errors->any())
    <div class="alert alert-danger">
        <ul>
            @foreach ($errors->all() as $error)
                <li>{{ $error }}</li>
            @endforeach
        </ul>
    </div>
@endif

<form method="POST" action="/example">
    @csrf
    <label for="category">Category:</label>
    <select name="category" id="category">
        <option value="books">Books</option>
        <option value="electronics">Electronics</option>
        <option value="clothing">Clothing</option>
    </select>

    <label for="price">Price:</label>
    <input type="text" name="price" id="price">

    <button type="submit">Submit</button>
</form>

php artisan make:rule ValidCategory

namespace App\Rules;

use Illuminate\Contracts\Validation\Rule;

class ValidCategory implements Rule
{
    public function passes($attribute, $value)
    {
        return in_array($value, ['books', 'electronics', 'clothing']);
    }

    public function message()
    {
        return 'The :attribute must be one of books, electronics, or clothing.';
    }
}

use App\Rules\ValidCategory;

public function store(Request $request)
{
    $request->validate([
        'category' => ['required', new ValidCategory()],
        'price' => 'required|numeric|min:0',
    ]);

    // 处理验证通过的数据
}