How to remove string value from array in firebase

Question

I am having a problem removing a kid string from an array of other aid strings in firebase. When a user creates a group chat, they include sharers. Those sharers are added to an array of strings and then added to firebase when made. Now when a user clicks the leave group chat button, I can't figure out a way to remove the current user's user id from that array, in which I have already checked if their uid is in the array. I have tried everything I can guys, first I tried ref.child("Group Chats").child(groupKey).child("sharers").child(myriad).removeValue, and that did not work, I also tried creating a new array without the current users id, removing the old array and adding the new one to firebase, all did not work, now I turn to some fellow coders. How can I remove the current users did from an array of uids in firebase.

        let action = UIAlertAction(title: "Leave Group Chat", style: .default, handler: {( alert : UIAlertAction) -> Void in
                let ref = FIRDatabase.database().reference()
                    if let keyp = self.groupChats[indexPath.row].key {

                        ref.child("Group Chats").child(keyp).child("sharers").child(uip).removeValue()



                                              }
                    self.groupChat.removeAll()
                    self.pull()
                    self.pullFromSharers()
                    self.tableViewManage.reloadData()

                })

Thank you!

Instead of removeValue go to the appropriate index you want to delete and try setValue(nil) — Moaz Khan
– Moaz Khan, Commented Aug 29, 2017 at 3:28
I tried ref.child("Group Chats").child(key).child("sharers").child(did).setValue(nil) — Randy Windin
– Randy Windin, Commented Aug 29, 2017 at 3:36

3stud1ant3 · Accepted Answer · 2017-08-29 04:52:21Z

2

After discussion with OP, we have found the solution

Problem is that your path is not calculated correctly, your path was getting the value instead of child, so modify your code as follows:

 ref.child("Group Chats").child(keyp).child("sharers").observe(.value, with: { snapshot in 
    if let sharers = snapshot.value as? [String] { 
    for i in 0..<sharers.count { 
    if sharers[i] == uip { 
      ref.child("Group Chats").child(keyp).child("sharers").child("\(i)").removeValue() 
    } 
    } 
    } 

    })

answered Aug 29, 2017 at 4:52

3stud1ant3

3,6062 gold badges15 silver badges15 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Swift Sharp Over a year ago

well that actually will not work because there is difference between key and index

Harish Mahajan · Accepted Answer · 2017-08-29 04:06:43Z

0

i used this simple method in angularjs. i think you also need same thing. try this it will help you.

var url = "your db path is here"
var dataObj = {'sharers':''};
   ref(url).set(dataObj).then(function(res) {
      console.log("response:- ",res);
   });

answered Aug 29, 2017 at 4:06

Harish Mahajan

3,3044 gold badges30 silver badges49 bronze badges

Comments

Moaz Khan · Accepted Answer · 2017-08-29 04:17:04Z

0

One way is to remove the entire node by setting to nil like I said in my comment and then setting the node back to the parent. Please check this post as well about firebase arrays.

https://stackoverflow.com/a/40657455/5123516

answered Aug 29, 2017 at 4:17

Moaz Khan

1,3622 gold badges13 silver badges28 bronze badges

Collectives™ on Stack Overflow

How to remove string value from array in firebase

3 Answers 3

1 Comment

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

1 Comment

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related