在读取最初用于验证用户到Firebase 3.0的提供程序（即Google、Facebook、Firebase）时出现权限问题

Question

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火场规则：

{
  "rules": {
    ".read": "auth != null",
    ".write": "auth != null",
    "user": {
      "uid": {
        "$provider": {
          ".read": true,
          ".write": "auth != null"
        }
      }
    }
  }
}

ViewController代码：

import UIKit
import Firebase

class ResetPasswordTableViewController: UITableViewController, UITextFieldDelegate {

    @IBOutlet weak var emailTextField: UITextField!

    override func viewDidLoad() {
        super.viewDidLoad()

        //Hide navigation bar
        self.navigationController?.navigationBarHidden = true

        //Text fields delegates
        self.emailTextField.delegate = self
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    //--------------------------------------------------------
    // MARK: Hide status bar
    //--------------------------------------------------------
    override func prefersStatusBarHidden() -> Bool {
        return true
    }

    @IBAction func resetPasswordButtonTapped(sender: AnyObject?) {

        //Set user fields
        let email = emailTextField.text

        // Check for empty fields
        if (email!.isEmpty)
        {
            // Display error message
            displayAlertMessage(REQUIRED_FIELDS_ERROR_TITTLE, message: REQUIRED_FIELDS_ERROR_MESSAGE)

            return;
        }

        // Validate email address
        if !(UserAccountValidator.validateEmailTextField(email!)) { //if invalid email format
            // Display error message
            self.displayAlertMessage(REENTER_EMAIL_ERROR_TITLE, message: REENTER_EMAIL_ERROR_TITLE)
            return
        }

        // Get the current user's provider, only those users who were authenticated with Firebase as the provider should be sent a reset password email
        let authProvider = getAuthProvider(email!)
        if (!authProvider.isEmpty && authProvider == "Firebase") {
            FIRAuth.auth()?.sendPasswordResetWithEmail(email!) { error in
                // Back to main thread
                NSOperationQueue.mainQueue().addOperationWithBlock {
                    if  error != nil {
                        if let errorCode = FIRAuthErrorCode(rawValue: error!.code) {
                            switch (errorCode) {
                            case .ErrorCodeUserNotFound:
                                self.displayAlertMessage(EMAIL_NOTFOUND_3RDPARTY_ERROR_TITLE, message: EMAIL_NOTFOUND_3RDPARTY_ERROR_MESSAGE);
                                return
                            default:
                                self.displayAlertMessage(ACCOUNT_CREATION_DB_ERROR_TITLE, message: ACCOUNT_CREATION_DB_ERROR_MESSAGE);
                                return
                            }
                        }
                    } else {
                        // Present reset password success view
                        self.performSegueWithIdentifier("resetPasswordSuccessView", sender: self)
                    }
                }
            }
        } else {
            // Display error message
            displayAlertMessage("Authentication Provider Mismatch", message: "It looks like you originally signed in with this email using Google or Facebook. Please reset your password with the appropriate provider and then come back and sign in with your new password.")
        }
    }

    //--------------------------------------------------------
    // MARK: Local Methods
    //--------------------------------------------------------
    func getAuthProvider(email: String) -> String {
        //Retrieve Authentication Provider for a given UID
        var authProvider: String = ""
        FIRDatabase.database().reference().child("user").queryEqualToValue(email).observeSingleEventOfType(.Value, withBlock: { (snapshot) in
            // Get user value
            authProvider = snapshot.value!["provider"] as! String
        }) { (error) in
            print(error.localizedDescription)
        }
        return authProvider
    }

    //--------------------------------------
    // MARK: - Display Error Message Methods
    //--------------------------------------
    func displayAlertMessage(title:String,message:String)
    {
        let alertMessage = UIAlertController(title: title, message: message, preferredStyle:UIAlertControllerStyle.Alert);

        let okAction = UIAlertAction(title:"OK", style: .Default, handler:nil);

        alertMessage.addAction(okAction);

        self.presentViewController(alertMessage, animated: true, completion: nil);

    }
}

Answer 1

如果我减少你的问题，下面的代码：

FIRDatabase.database().reference().child("user").queryEqualToValue(email).observeSingleEventOfType(.Value, withBlock: { (snapshot) in

无法使用以下规则读取未经身份验证的用户：

{
  "rules": {
    ".read": "auth != null",
    ".write": "auth != null",
    "user": {
      "uid": {
        "$provider": {
          ".read": true,
          ".write": "auth != null"
        }
      }
    }
  }
}

两件事：

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