检索嵌套数据我有一个火力点的结构是这样火力地堡:来自未知孩子
"broadcast": {
"ghjghjFc1S3KO0y8yJwORdfgret": { //user ID
"ryrtybgzMiI858YyGua": { //broadcast ID
"a": "xxx", // broadcast Detail
"b": "yyy",
"c": false
}
"cbvbcvbMvAnSDqTb15vU": { //broadcast ID
"a": "xxx", // broadcast Detail
"b": "yyy",
"c": true
}
}
"3uqWZJRFc1S3KO0y8yJwORTMtWC2": { //user ID
"jkhjkbgzMiI858YyGua": { //broadcast ID
"a": "xxx", // broadcast Detail
"b": "yyy",
"c": false
}
"qwwerqweMvAnSDqTb15vU": { //broadcast ID
"a": "xxx", // broadcast Detail
"b": "yyy",
"c": true
}
}
}
我想检索具有广播其中c等于真正的所有节点。我怎样才能迅速做到这一点?你可以这样做
对于所有的用户或单个用户? –
@NiravD谢谢。我已经试过这个查询,但我什么都没有(snapshot.childrenCount = 0) –
@ user7814783其实我想检索所有用户沿他们的广播,但只有那些'c'等于真的 –