Im getting Invalid document reference. Document references must have an even number of segments error in xcode

Question

class RoomFeed: UIViewController, UITableViewDelegate, UITableViewDataSource{
let posts = Post(id: self.documentId , author: owner!, text: text!, amount: self.amount)

//This is called in the view controller which is "host of table View" 
//Document Id at this point is not nill confirmed.


}





class PostTableVIewCell: UITableViewCell {
//This is table view cell

var king: String!
var postID: String!

 override func awakeFromNib() {
        super.awakeFromNib()

    Firestore.firestore().collection("GeneralData").document("\(self.postID)").getDocument { document, err in
        if let document = document, document.exists {
            let data = document.data()
            self.king = data!["1"] as? String
            let placeamount = data!["amount"] as? String
            self.amountLabel.text = placeamount
    
        }
        print("KING: \(self.king!)")
        self.kingLabel.text = self.king
    }}

    func set(post:Post) {
         
            usernameLabel.text = post.author
            PostTextLabel.text = post.text
            self.amount = post.amount
          postID = post.id
        }
}

This is my code but I'm getting an error which states "'FIRESTORE INTERNAL ASSERTION FAILED: Invalid document reference. Document references must have an even number of segments" what am I doing wrong?

Are you sure to pass the correct document ID? Are you sure it's not an optional? — Gius
Yeah I printed the document ID in the console before these lines of code and it printed the proper document ID — biki codes
This is what the error more specifically says, "Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'FIRESTORE INTERNAL ASSERTION FAILED: Invalid document reference. Document references must have an even number of segments, but GeneralData has 1'" — biki codes
The code is well written, it should work. Try entering document ID manually. Remember that amount is a number, not a String. let placeamount = data!["amount"] as? Int — Gius

Gius Gius · Accepted Answer · 2020-07-14T07:46:14

You are probably wrong approach. I wrote you an example code that might help you. Write me a comment if you need more help.

ViewController.swift

import UIKit
import Firebase

class ViewController: UIViewController {
    
    @IBOutlet weak var tableView: UITableView!
    
    var postDataList = [Post]()
    
    override func viewDidLoad() {
        super.viewDidLoad()

        self.tableView.delegate = self
        self.tableView.dataSource = self
    
        Firestore.firestore().collection("GeneralData").getDocuments { document, err in
            if let document = document {
                let dataDescription = document.documents
                    
                for i in dataDescription {
                    let post = Post.init(data: i.data())
                    self.postDataList.append(post)
                }
                
                self.tableView.reloadData()
            }
            else {
                print("Document does not exist")
            }
        }
    }
    
}

extension ViewController: UITableViewDelegate, UITableViewDataSource {
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return self.postDataList.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! CustomTableViewCell
        
        let post = self.postDataList[indexPath.row]
        cell.setPost(post: post)
        
        return cell
    }
    
}

CustomTableViewCell.swift

import UIKit

class CustomTableViewCell: UITableViewCell {

    @IBOutlet weak var usernameLabel: UILabel!
    @IBOutlet weak var postTextLabel: UILabel!
    @IBOutlet weak var amountLabel: UILabel!
    
    override func awakeFromNib() {
        super.awakeFromNib()
        // Initialization code
    }

    func setPost(post: Post) {
        self.usernameLabel.text = post.name
        self.postTextLabel.text = post.text
        self.amountLabel.text = String(post.amount)
    }

}

Post.swift

struct Post {
    let name: String
    let surname: String
    let owner: String
    let amount: Int
    let text: String
    let uid: String
    
    init(data: [String: Any]) {
        self.name = data["name"] as! String
        self.surname = data["surname"] as! String
        self.owner = data["owner"] as! String
        self.amount = data["amount"] as! Int
        self.text = data["text"] as! String
        self.uid = data["uid"] as! String
    }
}

This is the structure your database should have:

Im getting Invalid document reference. Document references must have an even number of segments error in xcode

1 Answers