无法检索Firebase密钥并从角度删除Firebase中的对象

Question

我目前能够成功将数据推送到我的Firebase节点（属性）并创建新属性，但是一旦我推送数据，我不确定如何找到创建的新属性的关键字，然后将其删除。

我相信这很简单，但它仍然没有我。

在此先感谢。 :)下面

代码：

angular.module('propApp') 
.controller('propertyCtrl', function($scope, $rootScope, $mdDialog, $mdMedia, $mdSidenav){ 

    let database = firebase.database(); 
    let ref = database.ref(); 
    let uid = firebase.auth().currentUser.uid; 
    let propRef = ref.child('properties'); 

    // add new property function 
    $scope.addNewProperty = function(){ 

     var newProp = propRef.push({ 
      street: $scope.property.street, 
      postalCode: $scope.property.postalCode, 
      apt: $scope.property.apt, 
      city: $scope.property.city, 
      state: $scope.property.state, 
      landlord: uid, 
      address: $scope.property.street + " " + $scope.property.city + " " + $scope.property.state + " " + $scope.property.postalCode + " " + $scope.property.apt 
     }) 
    }; 

    // var newPropKey = newProp.push().key; 


    // delete property function 
    $scope.deleteProperty = function(){ 
     // delete property 

     // new property variable 
     var newPropKey = ????; //not sure if this is right 

     // want to use a variable to delete property 
     propRef.child('newPropKey').remove(); 



     console.log('deleted!'); 
    } 

}) 

Answer 1

var ref = firebase.database().ref('properties'); 

ref.push({some:'thing'}).then(function(snap) { 
    console.log(snap.key); 
    //look at the database to verify the key is there 
    setTimeout(function() { 
    snap.ref.set(null); 
    //or 
    //ref.child(snap.key).set(null); 
    },5000); 
})