Firestore getDocument not working

[AB Dev]

I am unable to get Firestore getDocuments working

I am trying this

let docRef = db.collection(“cities”).document(“SF”)

docRef.getDocument { (document, error) in

  if let document = document, document.exists {

      let dataDescription = document.data().map(String.init(describing:)) ?? “nil”

      print(“Document data: \(dataDescription)“)

  } else {

      print(“Document does not exist”)

  }

}

from this URL: https://firebase.google.com/docs/firestore/query-data/get-data

I have updated the pods

docRef.getDocument doesnt return anything

The collection exists in the firebase and I can print the collection ID

I just cant iterate through the docs in the collection

Can anyone help me with this?

Thanks,

AB

[Samuel Stern]

Hi AB,

In the code you showed above there is an "error" parameter passed into the callback.  Could you print out the error and then show me what it says?  That should help determine why you can't fetch the document. 

Thanks,

SAm

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[AB Dev]

Hi Sam,

Thanks for having a look, the problem is that even that’s not being hit during debugging. While debugging that whole block starting from getDocs is skipped.
I am not sure if I have coded the completion block incorrectly. I expect the code from Firestore sample webpages to work but, I am unable to making reading from a document work.
Moreover, if I do get documentID on the doc then it works. But, I am unable to read the values inside the document.

Thank you,
Abhinav

[Samuel Stern]

Hi Abhinav,

The completion in the getDocument call is asynchronous, so "skipping over" it when debugging is the expected behavior.  It will call back once the document is read, or if the read fails.  That should happen <1s later.  Do you see either of the print() messages in your logs?

- Sam

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[AB Dev]

Hi Sam,

Oh ok. Though I have tried printing the error, I never saw anything in the logs. I will try again and let you know.

Thanks,
Abhinav

[AB Dev]

Hi Sam,

I changed the block to this:

let db = Firestore.firestore()

        let docReff = db.collection("sampleData").document("Inspiration")

        

        docReff.getDocument { (document, error) in

            if let err = error {

                print("ERROR")

                print("Error getting documents: \(err)")

            }

            

            if let document = document, document.exists {

                let dataDescription = document.data().map(String.init(describing:)) ?? "nil"

                print("Document data: \(dataDescription)")

            } else {

                print("Document does not exist")

            }

            

            print("here")

            print(error.debugDescription)

        }

And, nothing ever prints on the console.

I am not sure what I am doing wrong

Thanks,

AB

[AB Dev]

Hi Sam,

Thanks for all your help!

Its working now, there was a problem with the rules in the Firebase project console.

Thanks again!

AB

On Tuesday, October 9, 2018 at 3:22:39 PM UTC-4, Samuel Stern wrote:

[Samuel Stern]

Glad you got it working!  For future reference when you're having rules issues you should see your "error" block show a "Permission Denied" error.

- Sam

To view this discussion on the web visit https://groups.google.com/d/msgid/firebase-talk/2c75bbaa-310e-4b6a-b62e-84c670fcf37c%40googlegroups.com.