Firebase returns nil when fetching data-CodePudding

I had a problem with fetching data, seems to be working now, but instead of observing .childAdded, i need to observe value.

My Current code function is:

    func fetchJobs() {
ref.child("jobposts").observe(.childAdded) { (snapshot) in
    
    guard let dictionary = snapshot.value as? [String:Any]  else { return}
    
    var job = JobData()
    
    job.title = (dictionary["title"] as! String) <-- Error in any of the job.*
    job.company = (dictionary["company"] as! String)
    job.city = (dictionary["city"] as! String)
    job.salary = (dictionary["salary"] as! String)
    job.creator = (dictionary["creator"] as! String)
    
    self.jobs.append(job)
    
}
}

When i change .observe(.childAdded) to .observe(.value) i get an error :

 Thread 1: Fatal error: Unexpectedly found nil while unwrapping an Optional value

Any ideas what could cause this?

Using print(dictionary) prints all the documents, maybe i need to map them somehow? Thank you in advance

CodePudding user response：

When you observe a .value event for a list of nodes, you need to loop over snapshot.children to get the individual nodes. From the documentation on listening for value events for lists:

_commentsRef.observe(.value) { snapshot in
  for child in snapshot.children {
    ...
  }
}

The ... is where your current code inside the .childAdded listener goes.