我有以下结构火力地堡queryEqual(toValue :)不工作
"users":{
"user1234" {
"username": "user1234"
}
}
我试图做一个查询找到与用户名“user1234”用户数据库。当我使用queryEqual(toValue :)我没有得到任何匹配,但是当使用queryStarting(atValue:)我得到用户。我已确认用户名实际上是“user1234”。我究竟做错了什么?
let query1 = databaseRef.child("users").queryOrdered(byChild:"username").queryStarting(atValue: "user1234").queryLimited(toFirst: 1)
query1.observeSingleEvent(of: FIRDataEventType.value, with: { (snapshot) in
//snapshot contains the user with username "user1234"
})
但是以下不起作用
let query2 = databaseRef.child("users").queryOrdered(byChild:"username").queryEqual(toValue: "user1234")
query2.observeSingleEvent(of: FIRDataEventType.value, with: { (snapshot) in
//snapshot DOES NOT contain the user with username "user1234"
})
我的安全规则
"rules": {
".read": "true",
".write": "true",
"users": {
"$uid": {
".indexOn": ["username"],
},
},
},
你确定usernameLowered =“user1234”在第二个查询吗? –
是的,这只是输入问题的一个错字。感谢您指出它 – Nilsymbol