Firebase 身份验证创建用户但不将其信息添加到数据库

Question

我是一般使用 firebase 和 ios 开发的新手。我在将用户信息添加到 firestore 数据库时遇到问题，即使他们被添加为经过身份验证的用户。有什么建议吗？

Auth.auth().createUser(withEmail: email, password: password) { (result, err) in
                if err != nil {
                    self.errorLabel.text = "Error Creating User"
                    self.errorLabel.alpha = 1
                } else {
                    let db = Firestore.firestore()

                    db.collection("users").addDocument(data: ["firstname":firstname, "lastname":lastname, "uid":result!.user.uid]) { (error) in

                        if error != nil {

                            self.errorLabel.text = "error saving user data"
                            self.errorLabel.alpha = 1
                        }
                    }

                    self.transitionScreens()

                }
            }
        }
    }

Answer 1

查看以下不同规则，您可以根据数据授予用户访问权限

service cloud.firestore {
  match /databases/{database}/documents {
  //allows all users to read and write, but dangerous as any one can flood your database
    match /public_collection/{document=**} {
        allow read, write: if true;
    }
//only read access
    match /public_read_collection/{document=**} {
        allow read: if true;
        allow write: if false;
    }
//prefered for storing users personal info, users can access only their data
    match /users/{userId} {
      allow read, write: if request.auth.uid == userId;
    }
//any authenticated user can access or write data
    match /posts/{documentId} {
      allow read, write: if request.auth.uid != null;
    }
  }
}

Answer 2

将您的代码更改为以下内容：

// Add a new document with a generated ID
var ref: DocumentReference? = nil
ref = db.collection("users").addDocument(data: [
    "firstname": firstname,
    "lastname": lastname,
    "uid": result!.user.uid
]) { err in
    if let err = err {
        print("Error adding document: \(err)")
    } else {
        print("Document added with ID: \(ref!.documentID)")
    }
}

使用这个打印语句print("Error adding document: \(err)")你可以确切地知道错误是什么。

还将您的安全规则更改为以下内容：

// Allow read/write access to all users under any conditions
// Warning: **NEVER** use this rule set in production; it allows
// anyone to overwrite your entire database.
service cloud.firestore {
  match /databases/{database}/documents {
    match /{document=**} {
      allow read, write: if true;
    }
  }
}