Swift Firestore 使用数组获取文档字段

Question

I am using an array named PosterEmail to search for a document field name "First Name" in my Firestore Database.

Here you can see my database set up.

FirebaseSetup

enter image description here

As you can see my Database is Public then in the document I have the user's email as the document name and in that document I have their information such as their first name, last name, and profile photo url.

I search for the document id using an Array

The PosterEmail array is

PosterEmail = ["chainsawloco@yahoo.com", "allmight@gmail.com", "allmight@gmail.com", "chainsawloco@yahoo.com"]

I am going through my PosterEmail index by setting a variable "profilecount" to 0 and adding 1 to it everytime to go through the PosterArray

let docRef = db.collection("Public").document("\(self.PosterEmail[self.profilecount])")

But it seems that the code above never searches for the Firebase document named after the second item in my Array

The result is just

["Irving ", "Irving ", "Irving ", "Irving "]

The result should end up as [Irving, Allmight, Allmight, Irving]

Is there something I"m doing wrong?

Below is where I call my getPosteInformation() in another method called getDatFromFirestore() (ehhh I know my method name has a typo but I can fix that later)

               if let postedBy = document.get("postedBy") as? String {
                    print("Postby = document.get(postedby = \(postedBy)")
                    self.PosterEmail.append(postedBy)

                    if self.PosterEmail.count > 0 {
                               self.getPosteInformation()
                          }
                }
            }
        }
    }

Below you can see my full code.

func getDatFromFirestore() {

    let firestoreDatabase = Firestore.firestore()

    firestoreDatabase.collection("Posts").order(by: "Date" , descending : true).getDocuments { (snapshot, error) in
        if error != nil {
            print(error?.localizedDescription ?? "Connection Error")
        } else {
            self.userPostImageArray.removeAll(keepingCapacity: false)
            self.userCommentArray.removeAll(keepingCapacity: false)
            self.userCommentArray.removeAll(keepingCapacity: false)
            self.likeArray.removeAll(keepingCapacity: false)
            self.PosterEmail.removeAll(keepingCapacity: false)
            self.userProfilePhotoArray.removeAll(keepingCapacity: false)
            self.PosterFirstNameArray.removeAll(keepingCapacity: false)
            self.PosterLastNameArray.removeAll(keepingCapacity: false)

            for document in snapshot!.documents {

                let documentID = document.documentID

                self.documentIDArray.append(documentID)

                if let postDescription = document.get("PostDescription") as? String {
                    self.userPostDescription.append(postDescription)
                }

                if let imageUrl = document.get("imageUrl") as? String {
                    self.userPostImageArray.append(imageUrl)
                }

                if let PostLikes = document.get("Likes") as? Int {
                    self.likeArray.append(PostLikes)
                }

                if let postTimeStamp = document.get("Date") as? Timestamp {

                    let date = postTimeStamp.dateValue()

                    let formatter = DateFormatter()
                    formatter.dateFormat = "HH:mm MM/dd/yyyy"
                    let dateString = formatter.string(from: date)
                    let timeStampAsString = dateString

                    self.postDate.append(timeStampAsString)
                }

                if let postedBy = document.get("postedBy") as? String {
                    print("Postby = document.get(postedby = \(postedBy)")
                    self.PosterEmail.append(postedBy)

                    if self.PosterEmail.count > 0 {
                               self.getPosteInformation()
                           }
                }
            }
        }
    }
    self.VidaFeed.reloadData()
}

func getPosteInformation() {

    print("")
    print(PosterEmail[profilecount])
    print(profilecount)
    print("")


    print(PosterEmail)
    let docRef = db.collection("Public").document("\(self.PosterEmail[self.profilecount])")

    docRef.getDocument { (document, error) in
        if let document = document, document.exists {
            let dataDescription = document.data().map(String.init(describing:)) ?? "nil"
            print("Document data: \(dataDescription)")

            if self.profilecount < self.PosterEmail.count {

                if let PosterFirstName = document.get("First Name") as? String {
                    self.PosterFirstNameArray.append(PosterFirstName)
                    print(self.PosterFirstNameArray)

                    print("\(self.profilecount)")
                    if self.PosterEmail.count > self.profilecount {
                        self.profilecount = self.profilecount + 1
                    }

                }
            }
        } else {
            print("Document does not exist")
        }
    }
}

Answer 1

           if let postedBy = document.get("postedBy") as? String {
                print("Postby = document.get(postedby = \(postedBy)")
                self.PosterEmail.append(postedBy)
                self.PosterFirstNameArray.append("")

                if self.PosterEmail.count > 0 {
                   self.getPosteInformation(profCount: self.profileCount)
                }

                if self.PosterEmail.count > self.profilecount {
                    self.profilecount = self.profilecount + 1
                }
            }

And now if you could modify this method like this:

            func getPosteInformation(profCount:Int) {

                //and inside the async call back instead of the following try 
                /*if let PosterFirstName = document.get("First Name") as? String {
                self.PosterFirstNameArray.append(PosterFirstName)
                print(self.PosterFirstNameArray)

                print("\(self.profilecount)")
                if self.PosterEmail.count > self.profilecount {
                    self.profilecount = self.profilecount + 1
                }

                }*/

                if let PosterFirstName = document.get("First Name") as? String              {
                self.PosterFirstNameArray[profCount] = PosterFirstName
                print(self.PosterFirstNameArray)

                print("\(profCount)")


            }

            }