[ Lumen 5.2 文档 ] 更多特性 -- 验证
1、简介
Lumen提供了多种方法来验证应用输入数据。默认情况下,Lumen的控制器基类使用 ValidatesRequeststrait,该trait提供了便利的方法通过各种功能强大的验证规则来验证输入的HTTP请求。
2、与Laravel的不同之处
大多数情况下,Lumen中的验证实现和Laravel一样,可以通过完整的Laravel验证文档了解更多实现细节,但是两者之间还是有一些区别:
在请求中验证
Lumen不支持从请求中验证输入,如果你要实现这一功能,只能使用完整的Laravel框架。
$this->validate方法
在Lumen控制器中调用 $this->validate方法总是会返回带错误信息的JSON响应,而Laravel中如果不是AJAX请求的话该方法会直接返回响应,错误信息会存放到Session中。由于Lumen是无状态的(不支持Session),一次性Session错误信息也就不可能实现了,如果你想要实现这样的功能,也只能使用Laravel框架。
不同于Laravel,Lumen提供了从路由闭包中访问 validate方法的功能:
use Illuminate\Http\Request;$app->post('/user', function (Request $request) { $this->validate($request, [ 'name' => 'required', 'email' => 'required|email|unique:users' ]); // Store User...});
当然,你也可以像在Laravel中一样使用 Validator::make手动创建验证器实例。
$errors视图变量
由于Lumen不再支持Session,所以视图变量 $errors也就不再有效,前面已经提到, $this->validate验证失败的话总是会返回带有错误信息的JSON响应,如果你不是在构建只返回JSON响应的无状态API,那么请使用完整的Laravel框架。

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