无法删除sql数据库中的数据[Angularjs]

Question

我正在尝试从sql db中删除简单的一行数据，但它失败了。

问题是

Applications/XAMPP/xamppfiles/htdocs/middlework/administration/dash.php</b> on line <b>225</b><br />
DELETE FROM `cafe` WHERE cafe_id=;Error

你可以看到[WHERE cafe_id =;]没有值，它发送“”到php文件然后php无法完成他们的工作。

以下是我的代码：

     $scope.deleteData = function (cafe_id) {
 var path = $scope.path + '?n=' + $scope.table + '&id="' + cafe_id + '"&action=delete' + '&app=true';

            $http.get(path)
                .then(function (response) {
                    //First function handles success
                    // $scope.getData();
                }, function (response) {
                    //Second function handles error
                    $scope.content = "Something went wrong";
                });
        } 



$scope.getData = function () {

            $scope.table = "cafe";

            var path = $scope.path + '?n=' + $scope.table + '&app=true';

            $http.get(path)
                .then(function (response) {
                    //First function handles success
                    $scope.content = response.data;
                    $scope.update = false;
                    $scope.reset();
                }, function (response) {
                    //Second function handles error
                    $scope.content = "Something went wrong";
                });
        }

html部分

<table  method="post" border="1" ng-init="getData();">
<tr ng-repeat="x in content">
  <td>{{x.cafe_id}}</td>
  <td>{{x.Username}}</td>
  <td>{{x.CafeName}}</td>
  <td><button ng-click="editData(x.id)" >Edit</button></td>
  <td><button ng-click="deleteData(x.cafe_id)" >Del</button></td>
</tr>
</table>