Flatened Firebase query in iOS issues - ios

Question

I have a "flatened" Firebase structure and trying to retrieve a dictionary of values from a "secondary" database member. In other words, I have a conversation which has a "to" cell which has the key to a business listing. With this key, I'm trying to retrieve the business listing and its children (url, description, title). For some reason, I can print the snapshot2.value and it responds with the expected value, but I can't pass it to my class initialization.
DataService.ds.REF_CONVOS.observeEventType(.Value, withBlock: {snapshot in
self.convoListings.removeAll()
self.convoListings = []
//Data parsing from Firebase. The goal is to breakdown the data received and store in a local model.
if let snapshots = snapshot.children.allObjects as? [FDataSnapshot] {
for snap in snapshots {
for convo in userConvos {
// Going into the children of the main object for the conversations.
//print("\(snap)")
if convo == snap.key {
//print(snap.value)
print(snap.value)
if let businessDict = snap.value as? Dictionary<String, AnyObject> {
businessName.removeAll()
let test = businessDict["to"] as? String
DataService.ds.REF_BusinessListing.childByAppendingPath(test).childByAppendingPath("title/").observeSingleEventOfType(.Value, withBlock: { snapshot2 in
print(snapshot2.value)
})
let key = snap.key
let post = ConvoListing(convoKey: key, dictionary: businessDict, businessName: self.test2)
self.convoListings.append(post)
}
}
}
}
}
self.tableView.reloadData()
})

Answer 1

Your nesting seems of:
DataService.ds.REF_BusinessListing.childByAppendingPath(test).childByAppendingPath("title/").observeSingleEventOfType(.Value, withBlock: { snapshot2 in
print(snapshot2.value)
})
let key = snap.key
let post = ConvoListing(convoKey: key, dictionary: businessDict, businessName: self.test2)
self.convoListings.append(post)
Keep in mind the observeSingleEventOfType loads the data asynchronously. For this reason, if you have code that needs the value that you loaded, you need to put that code in the block:
DataService.ds.REF_BusinessListing.childByAppendingPath(test).childByAppendingPath("title/").observeSingleEventOfType(.Value, withBlock: { snapshot2 in
print(snapshot2.value)
let key = snap.key
let post = ConvoListing(convoKey: key, dictionary: businessDict, businessName: self.test2)
self.convoListings.append(post)
})