如何使用$保存（）來更新對象屬性值

Question

我有下面的代碼：

var FBref = new Firebase('https://employees.firebaseio.com/'); 
var peopleObject = $firebaseArray(FBref); 

var person = { 
      "name":"John", 
      "age":"20", 
      "phone":"123-123-123" 
     }; 

peopleObject.$add(person); 

我用上面的代碼，以成功添加員工新記錄。

我需要將John的電話號碼更新爲111-111-111。但下面的代碼不起作用。

var person = { 
      "name":"John", 
      "age":"20", 
      "phone":"111-111-111" //New phone number 
     }; 

peopleObject.$save(person); 

有人建議

Answer 1

目前你正在試圖挽救整個對象，這是行不通的。

通過首先從db獲取記錄來檢索舊記錄&然後更新該記錄。此後使用$save方法保存該對象。

//if update action is happening is similar session you can get unique by below code 
var someRecordKey; 
peopleObject.$add(person).then(function(ref) { 
    //get record id of new person 
    someRecordKey = ref.key(); 
}); 

// get record by unique key 
var person = peopleObject.$getRecord(someRecordKey); 
// change a message and save it 
item.phone = "111-111-111"; 
peopleObject.$save(person).then(function() { 
    // data has been saved to our database 
});