检查请求中是否存在对象元素

Question

如果$ request对象和我需要检查某些值是否在$ request

Request {#43 ▼
  #json: null
  #convertedFiles: null
  #userResolver: Closure {#170 ▶}
  #routeResolver: Closure {#172 ▶}
  +attributes: ParameterBag {#45 ▶}
  +request: ParameterBag {#44 ▼
    #parameters: array:18 [▼
      "_token" => "sT4yCby4ieh3rHAK0MBcMIcYkGMDzjs0Jf1co4WS"
      "is_demand" => "1"
      "title" => null
      "main_category" => "C01"
      "secondary_category" => "C0201"
      "main_category_2" => "C01"
      "secondary_category_2" => "C0201"
      "status" => "granted"
      "interest" => "code1"
      "keywords" => null
      "keywords_secondary" => null
      "challenge" => null
      "requirement" => null
      "summary" => null
      "dateStart" => "1970-01-01"
      "dateEnd" => "2017-11-07"
      "trlMin" => null
      "trlMax" => null
    ]
  }

尝试

if ( ! property_exists($this->request, 'is_demand')) {
   throw new \Exception('"is_demand" is undefined');
}

但是获得异常，虽然定义了is_demand并且具有值

我的错误或缺乏理解是什么？

Answer 1

= 1 GROUP BY md )t2 ON t2.md = t1.md LEFT JOIN ( SELECT DATE_FORMAT(date_lm, "%b") AS month, COUNT(*) AS total ,DATE_FORMAT(date_lm, "%Y-%m") AS md FROM tbl_users WHERE date_lm <= NOW() AND date_lm >= Date_add(Now(),INTERVAL - 11 MONTH) AND status = 'submitted' GROUP BY md )t3 ON t3.md = t1.md GROUP BY t1.md ORDER BY t1.md是ParameterBag。它不仅没有$this->request属性，而且你甚至不关心它的属性，而是它所包含的参数的值。

使用has()课程提供的ParameterBag方法找出您需要的内容：

is_demand