swift check to see if firebase value is true or false - swift

Question

Hello I'm retrieving some info from firebase the data I'm looking for are three child deep and consist to a boolean. When I Print the value im able to get the result but im not able to see if the result is true or false.
func userInfo() {
let dbRef = FIRDatabase.database().reference()
let stRef = FIRStorage.storage().reference()
dbRef.child("users/\(userBiD!)").observeEventType(.Value, withBlock: { snapshot in
let name = snapshot.value!["firstname"] as! String
let profileImage = snapshot.value!["profilePic"] as! String
let receivePostRequest = snapshot.value?["receivePostRequest"]
self.nameLabel.text = name
self.dbUserProfilePic(self.profilePhotoImageView, imageLink: profileImage)
let receivePost = snapshot.childSnapshotForPath("receivePostRequest")
let tags = receivePost.childSnapshotForPath("tags")
for child in tags.children {
/*
...
tags{
tag1 = true
tag2 = false
}
//I need to print all keys that have a true value
*/
}
})
}
firebase json

Answer 1

Since, according to the Firebase Docs,
.children is . . .
An iterator for snapshots of the child nodes in this snapshot. You can use the native for..in syntax.
. . . then you must use .value to access their data and .key to access their keys.
Therefore, you could do something like this.
func userInfo() {
let dbRef = FIRDatabase.database().reference()
let stRef = FIRStorage.storage().reference()
dbRef.child("users/\(userBiD!)").observeEventType(.Value, withBlock: { snapshot in
let name = snapshot.value!["firstname"] as! String
let profileImage = snapshot.value!["profilePic"] as! String
let receivePostRequest = snapshot.value?["receivePostRequest"]
self.nameLabel.text = name
self.dbUserProfilePic(self.profilePhotoImageView, imageLink: profileImage)
let receivePost = snapshot.childSnapshotForPath("receivePostRequest")
let tags = receivePost.childSnapshotForPath("tags")
for child in tags.children {
// NEW
if child.value == true {
print(child.key)
}
// NEW
}
})
}
Or, if you wanted to save all true values in an array.
func userInfo() {
let dbRef = FIRDatabase.database().reference()
let stRef = FIRStorage.storage().reference()
dbRef.child("users/\(userBiD!)").observeEventType(.Value, withBlock: { snapshot in
let name = snapshot.value!["firstname"] as! String
let profileImage = snapshot.value!["profilePic"] as! String
let receivePostRequest = snapshot.value?["receivePostRequest"]
self.nameLabel.text = name
self.dbUserProfilePic(self.profilePhotoImageView, imageLink: profileImage)
let receivePost = snapshot.childSnapshotForPath("receivePostRequest")
let tags = receivePost.childSnapshotForPath("tags")
for child in tags.children {
// NEW
var trueValues: [Bool] = []
if child.value == true {
trueValues.append(child.key)
}
// NEW
}
})
}