Retrieving multiple data in Firebase with Swift - swift

Question

Here is the database
I'm trying to append isDisable to an array
What i've come so far:
func retrieving(){
Database.database().reference().child("ServingHours/\(choosenDate)").observeSingleEvent(of: .value, with: {(snapshot) in
if let eachDict = snapshot.value as? NSDictionary{
for each in eachDict{
print(each.value)
}
}
}, withCancel: {(Err) in
})
}
with the result in console:
{
isDisable = false;
numberOfRegistration = 0;
}
{
isDisable = false;
numberOfRegistration = 0;
}
{
isDisable = false;
numberOfRegistration = 0;
}
{
isDisable = false;
numberOfRegistration = 0;
}
From this, I don't know what to do to get a specific value from each.value

Answer 1

You're retrieving your specific dates objects which have 2 items within them (isDisable and numberOfRegistration). When you retrieve them from Firebase, you're type casting them into NSDictionary using "as?".
Your values seem to be in String format, therefore, you can retrieve them from the NSDictionary using:
let isDisabled = eachDict["isDisable"] as? String
let numberOfRegistration = eachDict["numberOfRegistration"] as? String
You can also directly set your values in Firebase to be a Bool or Int and you can typecast your retrieved objects into Bool (isDisable) and Int (numberOfRegistration). But it looks like they are currently Strings, so your code would like this:
func retrieving(){
Database.database().reference().child("ServingHours/\(choosenDate)").observeSingleEvent(of: .value, with: {(snapshot) in
if let eachDict = snapshot.value as? NSDictionary{
let isDisabled = eachDict["isDisable"] as? String
let numberOfRegistration = eachDict["numberOfRegistration"] as? String
print(isDisabled)
print(numberOfRegistration)
}
}, withCancel: {(Err) in
})
}
Also, if you want to retrieve a value directly, then you don't need to use an NSDictionary. You can just directly cast that value you retrieve into whatever type of object you have. For example, say you want to retrieve your "isDisable" value directly:
func retrieving(){
Database.database().reference().child("ServingHours/\(choosenDate)").child("isDisable").observeSingleEvent(of: .value, with: {(snapshot) in
if let isDisable = snapshot.value as? String{
print(isDisable) }
Check out the Firebase official documentation for Swift:
https://firebase.google.com/docs/database/ios/read-and-write

Answer 2

You need to cast to a dictionary once again (and don't use NSDictionary)
if let eachDict = snapshot.value as? [String: AnyObject]{
for each in eachDict {
if let innerDict = each as? [String: AnyObject] {
//innerDict now contains isDisable and numberOfRegistration
if let isDisable = innerDict["isDisable"] as? String
print(isDisable)
}
if let numberOfRegistration = innerDict["numberOfRegistration"] as? String {
print(numberOfRegistration)
}
}
}
}