Symfony 使用 GET 类型将参数传递给方法

Question

我正在使用 php symfony 版本 3.4 - GET 方法来调用带参数的方法，但出现以下错误。

service call : http://localhost/myworkspace/AMSCMS/web/app_dev.php/sse/server/events/get?data=1 

method :
/**
     * @Rest\Get("/server/events/get")
     */
    public function getServerEventsGetAction($dt) {
        try {   
            if($dt == 1){
                header('Content-Type: text/event-stream');
                header('Cache-Control: no-cache');
                $time = date('r');
                echo "data: The server time is: {$time}\n\n";
                flush();    
            }                   
        } catch ( Exception $ex ) {
            $result = $display->getJsonException($ex);
        }

    }

Error :
    {"error":{"code":500,"message":"Internal Server Error","exception":[{"message":"Controller \"AppBundle\Controller\ServerEventsController::getServerEventsGetAction()\" requires that you provide a value for the \"$dt\" argument. Either the argument is nullable and no null value has been provided, no default value has been provided or because there is a non optional argument after this one.","class":"RuntimeException","trace":[{"namespace":"","short_class":"","class":"","type":"","function":"","file":"C:\xampp\htdocs\myworkspace\ApartmentManagementSystem\ApartmentManagementScms\vendor\symfony\symfony\src\Symfony\Component\HttpKernel\Controller\ArgumentResolver.php","line":78,"args":[]},{"namespace":"Symfony\Component\HttpKernel\Controller","short_class":"ArgumentResolver","class":"Symfony\Component\HttpKernel\Controller\ArgumentResolver","type":"->","function":"getArguments","file":"C:\xampp\htdocs\myworkspace\ApartmentManagementSystem\ApartmentManagementScms\vendor\symfony\symfony\src\Symfony\Component\HttpKernel\Controller\TraceableArgumentResolver.php","line":38,"args":[["object","Symfony\Component\HttpFoundation\Request"],["array",[["object","AppBundle\Controller\ServerEventsController"],["string","getServerEventsGetAction"]]]]},{"namespace":"Symfony\Component\HttpKernel\Controller","short_class":"TraceableArgumentResolver","class":"Symfony\Component\HttpKernel\Controller\TraceableArgumentResolver","type":"->","function":"getArguments","file":"C:\xampp\htdocs\myworkspace\ApartmentManagementSystem\ApartmentManagementScms\vendor\symfony\symfony\src\Symfony\Component\HttpKernel\HttpKernel.php","line":143,"args":[["object","Symfony\Component\HttpFoundation\Request"],["array",[["object","AppBundle\Controller\ServerEventsController"],["string","getServerEventsGetAction"]]]]},{"namespace":"Symfony\Component\HttpKernel","short_class":"HttpKernel","class":"Symfony\Component\HttpKernel\HttpKernel","type":"->","function":"handleRaw","file":"C:\xampp\htdocs\myworkspace\ApartmentManagementSystem\ApartmentManagementScms\vendor\symfony\symfony\src\Symfony\Component\HttpKernel\HttpKernel.php","line":68,"args":[["object","Symfony\Component\HttpFoundation\Request"],["integer",1]]},{"namespace":"Symfony\Component\HttpKernel","short_class":"HttpKernel","class":"Symfony\Component\HttpKernel\HttpKernel","type":"->","function":"handle","file":"C:\xampp\htdocs\myworkspace\ApartmentManagementSystem\ApartmentManagementScms\vendor\symfony\symfony\src\Symfony\Component\HttpKernel\Kernel.php","line":200,"args":[["object","Symfony\Component\HttpFoundation\Request"],["integer",1],["boolean",true]]},{"namespace":"Symfony\Component\HttpKernel","short_class":"Kernel","class":"Symfony\Component\HttpKernel\Kernel","type":"->","function":"handle","file":"C:\xampp\htdocs\myworkspace\ApartmentManagementSystem\ApartmentManagementScms\web\app_dev.php","line":29,"args":[["object","Symfony\Component\HttpFoundation\Request"]]}]}]}}

Answer 1

您没有获取 GET 参数作为操作参数，您需要通过请求对象获取这些参数：

public function getServerEventsGetAction(Request $request) {
    $dt = $request->get('data');
    // ... check that $data is not null etc
}

或者您可以更改要包含在 url 中的参数（而不是 GET 参数），这样您就可以像控制器一样将其作为操作参数正常访问：

/**
 * @Rest\Get("/server/events/get/{dt}")
 */

并以这种格式使用 url：

http://localhost/myworkspace/AMSCMS/web/app_dev.php/sse/server/events/get/1

Symfony 使用 GET 类型将参数传递给方法

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