CODEWITHSUNDEEP
swiftdatabasefirebasefirebase-realtime-database
user1953498
user1953498

Reputation: 1

Getting list of items from firebase swift

Im have a database like this:

Database

The user will be able to favorite the places. I save the favorited places by saving the ids. I want to only get the favorited places from the database by using the IDs. I can´t figure out how to do this. Please help!

Upvotes: 0

Views: 3157

Answers (3)

Murat
Murat

Reputation: 1

self.ref.child("places").observe(.value) { (snapshot) in
            for child in snapshot.children {
                let snap = child as! DataSnapshot
            let placeDict = snap.value as! [String: Any]
            let info = placeDict["info"] as! String
            let moreInfo = placeDict["moreinfo"] as! String
            print(info, moreInfo)
            }
        }

Upvotes: 0

Jay
Jay

Reputation: 35648

It appears you are asking how to get a place by it's ID

(Swift 4, Firebase 4)

get the favorited places from the database by using the IDs

This will read a single place, placeId1

let placeRef = self.ref.child("places").child("placeId1")

placeRef.observeSingleEvent(of: .value, with: { snapshot in
    let placeDict = snapshot.value as! [String: Any]
    let info = placeDict["info"] as! String
    let moreInfo = placeDict["moreinfo"] as! String
    print(info, moreinfo)
})

this will read all the places (at once) and iterate over them

    let allPlaces = self.ref.child("places")

    allPlaces.observeSingleEvent(of: .value, with: { snapshot in
        for child in snapshot.children {
            let snap = child as! DataSnapshot
            let placeDict = snap.value as! [String: Any]
            let info = placeDict["info"] as! String
            let moreInfo = placeDict["moreinfo"] as! String
            print(info, moreInfo)
        }
    })

note: self.ref = Database.database().reference()

Upvotes: 1

Anushk
Anushk

Reputation: 492

You can use this to check each place id with your stored favorite place ids.

ref.child("places").observe(.childAdded, with: { (snapshot) in

    var newItems = [FIRDataSnapshot]() 

    for item in snapshot.children {

        if let value = (item as! FIRDataSnapshot).value as? String {
             // might want to do another loop if you have an array of places to check

           if snapshot.value as? String == "favorite_place_id" {
             // this is what you want
           }

        }

    }
})

Upvotes: 0

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