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我执行以下火力地堡查询:是否可以检测Firebase快照何时执行?
var getAdmin = function() {
var rootRef = new Firebase(FIREBASE_URI),
adminList = [],
deferred = $q.defer();
rootRef.child('user').orderByChild('role').startAt(21).once('child_added', function (administrator) {
// Add each Administrator to Admin List
adminList.push(administrator);
});
// deferred.resolve(?)
return deferred.promise;
};
我想解决与管理员列表的承诺。如何检测Firebase快照何时完全执行?
的可能的复制[如何在火力地堡DB丢弃初始数据](http://stackoverflow.com/questions/19883736/how-to-discard-initial-data-in-a-firebase-db ) – Kato