Firebase获取数据 [英] Firebase get data
本文介绍了Firebase获取数据的处理方法,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
我需要从x值等于y的firebase中获取数据。我阅读所有的文档,但是我找不到有用的东西来做到这一点。任何帮助将不胜感激
我需要像这样
$ c $ b
解决方案
您需要创建一个引用,按子键排序,然后指定 equalTo()
子句。
let ref = Firebase(url: https://dinosaur-facts.firebaseio.com/dinosaurs)
ref.queryOrderedByChild(height)。queryEqualToValue(25)
.observeEventType(.ChildAdded){(snapshot:FDataSnapshot)in
print(snapshot.key)
})
I need to get data from firebase where 'x' value equal to 'y'. I read all documentation, but I couldn't find anything helpful to do this. Any help will be appreciated
I need something like this
SELECT * FROM table_name WHERE x = y
解决方案
You need to create a reference, order by the child key, and then specify an equalTo()
clause.
let ref = Firebase(url: "https://dinosaur-facts.firebaseio.com/dinosaurs")
ref.queryOrderedByChild("height").queryEqualToValue(25)
.observeEventType(.ChildAdded) { (snapshot: FDataSnapshot) in
print(snapshot.key)
})
See the docs on querying for more information.
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