查询&在Firebase(swift 3) [英] query & where in Firebase (swift 3)
本文介绍了查询&在Firebase(swift 3)的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
select * from users where username =SomeUser
$ c
我需要在Firebase中做同样的事情,Swift 3
解决方案您需要使用 queryOrderedByChild
和 queryStartingAtValue
。这应该让你开始朝正确的方向发展。
let username =SomeUser
FIRDatabase.database()。reference.child(users)。queryOrderedByChild(username)。queryStartingAtValue(username).queryEndingAtValue(username).observeEventType .ChildAdded,withBlock:{(snapshot) - > Void in
}
How i can make query in firebase? On oracle sql the query would be
"select * from users where username = "SomeUser"
I need to do the same in Firebase, Swift 3
解决方案 You need to use queryOrderedByChild
and queryStartingAtValue
. This should get you started in the right direction.
let username = "SomeUser"
FIRDatabase.database().reference.child("users").queryOrderedByChild("username").queryStartingAtValue(username).queryEndingAtValue(username).observeEventType(.ChildAdded, withBlock: { (snapshot) -> Void in
}
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