14、Laravel 11 表单数据验证

我们完成了所有的功能，但是把最为重要的东西忽略了，那就是数据验证。本篇文章我们使用两种方式对数据进行验证。

控制器验证数据

1、添加验证

app/Http/Controllers/PostController.php

...
    
public function store(Request $request)
{
    // 表单数据验证
    $request->validate([
        'title'       => ['required'],
        'text'        => ['required'],
        'category_id' => ['required'],
    ]);

    Post::create([
        'title'       => $request->input('title'),
        'text'        => $request->input('text'),
        'category_id' => $request->input('category_id'),
    ]);

    return redirect()->route('posts.index');
}

2、显示错误信息

resources/views/posts/create.blade.php

...

<div class="p-6 text-gray-900">
    @if ($errors->any())
        <div class="alert alert-danger">
            <ul>
                @foreach ($errors->all() as $error)
                    <li>{{ $error }}</li>
                @endforeach
            </ul>
        </div>
    @endif
</div>

...

Form Request 验证

1、创建验证

$ php artisan make:request StoreCategoryRequest

编写验证规则

app/Http/Requests/StoreCategoryRequest.php

<?php

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;

class StoreCategoryRequest extends FormRequest
{
    public function authorize(): bool
    {
        return true;
    }
    
    public function rules(): array
    {
        return [
            'name' => ['required'],
        ];
    }
}

2、使用验证

app/Http/Controllers/CategoryController.php

use App\Http\Requests\StoreCategoryRequest;

...

public function store(StoreCategoryRequest $request)
{
    Category::create([
        'name' => $request->input('name'),
    ]);

    return redirect()->route('categories.index');
}

3、显示错误信息

resources/views/categories/edit.blade.php

...

<div class="bg-white overflow-hidden shadow-sm sm:rounded-lg">
    @if ($errors->any())
        <div class="alert alert-danger">
            <ul>
                @foreach ($errors->all() as $error)
                    <li>{{ $error }}</li>
                @endforeach
            </ul>
        </div>
    @endif
</div>         
...