实时数据库未将数据推送到 Firebase

Posted 2023-04-19

【中文标题】实时数据库未将数据推送到 Firebase

【英文标题】：Realtime database not getting data pushed into firebase

【发布时间】：2021-08-28 20:49:25

【问题描述】：

我正在使用实时数据库来保存用户信息，但问题是它根本不工作，同时存储和云火库正常工作，尝试更改规则，尝试不同的方法但没有一个真正有效，如果有人可以帮助谢谢你提前。

这是我的代码

class CustomerRegistrationActivity : AppCompatActivity() 
    private lateinit var imageDownloadUrl : String
    private var imageUrl : Uri? = null
    private lateinit var firebaseAuth: FirebaseAuth
    private lateinit var databaseReference: DatabaseReference
    private lateinit var storageReference: StorageReference
    private var _binding : ActivityCustomerRegistrationBinding?  = null
    private val binding get() = _binding!!
    override fun onCreate(savedInstanceState: Bundle?) 
        super.onCreate(savedInstanceState)
        _binding = ActivityCustomerRegistrationBinding.inflate(layoutInflater)
        setContentView(binding.root)


        init()

        binding.register.setOnClickListener 
            binding.register.startAnimation()
            registerNewCustomer()
        

        binding.customerImg.setOnClickListener 
            selectCustomerImage()
        

        binding.haveAccount.setOnClickListener 
            Intent(this, CustomerLoginAcitivity::class.java).apply 
                startActivity(this)
                finish()
            
        
    

    private fun init()
        firebaseAuth = FirebaseAuth.getInstance()
        databaseReference = FirebaseDatabase.getInstance().reference
        storageReference = FirebaseStorage.getInstance().reference
    
    private fun registerNewCustomer()
        val customerUserName  = binding.userName.text.toString()
        val customerPhone = binding.phone.text.toString()
        val customerEmail  = binding.email.text.toString()
        val customerPassword = binding.password.text.toString()

        if(TextUtils.isEmpty(customerUserName))
            Toast.makeText(this,"Missing Username..",Toast.LENGTH_SHORT).show()
            return
        
        if(TextUtils.isEmpty(customerPhone))
            Toast.makeText(this,"Missing phone..",Toast.LENGTH_SHORT).show()
            return
        
        if(TextUtils.isEmpty(customerEmail))
            Toast.makeText(this,"Missing Email..",Toast.LENGTH_SHORT).show()
            return
        
        if(TextUtils.isEmpty(customerPassword))
            Toast.makeText(this,"Missing password..",Toast.LENGTH_SHORT).show()
            return
        

        lifecycleScope.launch(Dispatchers.Main) 
            try 
              // creating user account 
               firebaseAuth.createUserWithEmailAndPassword(customerEmail,customerPassword).await()

 
                // check if image url is not null
                imageDownloadUrl = if(imageUrl == null)
                    ""
                 else 
                    // if url not null , push into firestorage
                    val task = storageReference.child("Customers")
                        .child(firebaseAuth.currentUser?.uid!!).putFile(imageUrl!!)
                    task.await().storage.downloadUrl.toString()
                

                // creating a map for user info
                val credentialsMap = hashMapOf<String,Any>()
                credentialsMap["customerName"] = customerUserName
                credentialsMap["customerEmail"] = customerEmail
                credentialsMap["CustomerPhone"] = customerPhone
                credentialsMap["accountType"] = "Customer"
                credentialsMap["profileImage"] = imageDownloadUrl


                // pushing data into realtime database
                // the issue is here , i even debugged the code , it executes but don't pass to 
                // to the next code and it is not saving data
                databaseReference
                        .child("customers")
                        .child(firebaseAuth.currentUser?.uid!!)
                        .setValue(credentialsMap).await()

                 // the code here gets never exeucte but there is issue with code above of real db
                binding.register.stopAnimation()

                CoroutineScope(Dispatchers.Main).launch 
                    delay(1000)
                    Intent(this@CustomerRegistrationActivity,CustomerMainActivity::class.java).apply 
                        startActivity(this)
                        finish()
                    
                

            catch (ex : Exception)
                binding.register.stopAnimation()
                Log.d(Utils.ACTIVITY_TAG,"Exception Registration $ex.message")
            
        
    
    private fun selectCustomerImage()
        Intent().apply 
            type = "image/*"
            action = Intent.ACTION_GET_CONTENT
            startActivityForResult(this, IMAGE_REQUEST_CODE)
        
    

    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) 
        super.onActivityResult(requestCode, resultCode, data)
        if(requestCode == IMAGE_REQUEST_CODE)
            data?.data.let 
                imageUrl = it
                binding.customerImg.setImageURI(imageUrl)
            
        
    

    override fun onDestroy() 
        super.onDestroy()
        _binding = null
    

    companion object 
        const val IMAGE_REQUEST_CODE = 1001
    

实时数据库规则

  "rules": 
       ".read": "auth !== null",
       ".write": "auth !== null"
  

【问题讨论】：

您可能需要addOnFailureListener 将值设置为firebase 并记录回调消息以查看错误

【参考方案1】：

尝试在 push 时删除 .await() 并将 db 规则设置为 true

".read": true,
".write": true

【讨论】：

我确实将它设置为 true 并且它不起作用，它现在起作用但真的很奇怪，我已经重建并清理了项目，它起作用了。不知道为什么，谢谢你的回答和你的时间伙伴。

".read": true 和 ".write": true 有各自的后果。设置读写权限 true 意味着简单地授予公共访问权限以读取和修改（甚至删除）数据库。请使用适当的安全规则来保护您的数据库免受恶意活动的侵害。如需详细了解Firebase 安全规则的最佳做法，请访问firebase.google.com/docs/rules/insecure-rules