设置自己的密钥时将对象添加到火力地堡 - AngularFire [英] Setting Your Own Key When Adding an Object to Firebase - AngularFire

问题描述

我可以使用下面的一个对象添加到我的火力地堡数据存储：

I can use the following to add an object to my Firebase data store:

var uniqueId = {
    name: "a name",
    location: "new york"
}
$scope.myItems.$add(uniqueId).then(function(firebaseId){
    // do something on success
}, function(){
    // do something if call fails
});

以上将添加一个对象到我的数据存储，如果添加成功，则返回由火力地堡生成的ID。我刚添加的对象此项下保存。

The above will add an object into my data store and if the add is successful, an ID generated by Firebase is returned. The object I just added is saved under this key.

有没有办法让我指定密钥的名字是什么，当我添加到我的数据存储？

Is there a way for me to specify what the key name is when I add to my data store?

推荐答案

以下面的网址，例如

https://myapp.firebaseio.com/users/

比方说，我们要创建一个在这个位置的1键作为一个孩子的用户。我们的网址是这样的。

Let's say we want to create a user with a key of 1 as a child at this location. Our URL would look like this.

https://myapp.firebaseio.com/users/1

要创建一个使用AngularFire我们可以创建在用户节点的引用，并调用$孩子（1）创建到该位置的引用的用户。

To create a user using AngularFire we can create a reference at the users node and call $child(1) to create a reference to that location.

var usersRef = new Firebase('https://myapp.firebaseio.com/users');
var userRef = new Firebase('https://myapp.firebaseio.com/user/1');

$scope.users = $firebase(usersRef);

// these are the same
$scope.userOne = $firebase(userRef);
$scope.userOne = $scope.users.$child(1);

然后我们可以使用 $设置给用户的值存储在该位置。

Then we can use $set to store the value of the user at that location.

var usersRef = new Firebase('https://myapp.firebaseio.com/users');
$scope.users = $firebase(usersRef);
$scope.users.$child(1).set({
  first: 'Vincent',
  last: 'Van Gough',
  ears: 1
});

在你的情况将是：

var uniqueId = {
    id: 1,
    name: "a name",
    location: "new york"
};
$scope.myItems.$child(uniqueId.id).$set(uniqueId);

请记住，使用 $设置将在该位置销毁任何previous数据。非破坏性更新的值，用 $更新。

Remember that using $set will destroy any previous data at that location. To non-destructively update the values use $update.

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