firebase-realtime-database

问题 Using the Javascript SDK and this sample firebase database, with an index on "mobile" : test A mobile : "+1234567" B mobile : "+2345678" Now I want to query all nodes with mobile = "+1234567" firebase.database().ref("test").orderByChild("mobile").equalTo("+1234567").once('value', function(snapshot) { console.log(snapshot.val()); }); output : null I asked this exact same question for REST API (resolved) : Firebase Realtime equalTo not working with String like "+123" But can not get it working

问题 Using the Javascript SDK and this sample firebase database, with an index on "mobile" : test A mobile : "+1234567" B mobile : "+2345678" Now I want to query all nodes with mobile = "+1234567" firebase.database().ref("test").orderByChild("mobile").equalTo("+1234567").once('value', function(snapshot) { console.log(snapshot.val()); }); output : null I asked this exact same question for REST API (resolved) : Firebase Realtime equalTo not working with String like "+123" But can not get it working

问题 So if I have an E-commerce App that doesn't require Login/Auth, and my users buy in the store, then after verifying the transaction the backend writes the order in the database. The thing is that my Realtime Database just relies on Stripe transaction key (i.e, someone has paid for an item) to be able to write on the DB, because my rules are set so anyone can write, otherwise I would need every user to log in, but that's not what I want. Firebase recently notified me that my rules are weak.

问题 How to trigger the firebase cloud function onUpdate each time any of the child "order_status" is == "accepted" (included the old Childs on trigger) my code won't work Have a look please : Code: exports.checkOrderStatus = functions.database.ref("/RestaurantOrders").onUpdate(async (change, context) => { var orderStatus = change.after.val().order_status; if (orderStatus == "accepted") { code... } else { return } } 回答1: exports.checkOrderStatus = functions.database.ref("/RestaurantOrders/{pushId}

问题 Using the Javascript SDK and this sample firebase database, with an index on "mobile" : test A mobile : "+1234567" B mobile : "+2345678" Now I want to query all nodes with mobile = "+1234567" firebase.database().ref("test").orderByChild("mobile").equalTo("+1234567").once('value', function(snapshot) { console.log(snapshot.val()); }); output : null I asked this exact same question for REST API (resolved) : Firebase Realtime equalTo not working with String like "+123" But can not get it working

问题 This question already has answers here : Query based on multiple where clauses in Firebase (6 answers) Closed 20 days ago . I am trying to short "realtime database" result according to "date" in flutter . But I cant use multiple orderByChild('child_name') . It throw an error. My code is final String path = 'jsondata'; final _dbRef = FirebaseDatabase.instance.reference(); _dbRef.child(path) .orderByChild('trade_code').equalTo('GP') .once() .then((DataSnapshot snapshot) { snapshot.value.forEach

问题 So I have this code: firebase.database().ref('putninalog/'+ NadiiIndeksNaloga()).remove(); This removes etc. [0] and all data connected to that index in database (it doesn't matter which number exactly). When I remove that index how do I update all other indexes to start from 0. Example: [0] [1] [2] [3] I remove: [0] This stays: [1] [2] [3] I want this: [0] [1] [2] 回答1: There is no way to remove an item at an index and then update all subsequent indexes in one operation. You will have to:

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 7 months ago . Improve this question Will making 2 database in firebase realtime database help to reduce cost and increase daily download limit of 360MB per day? 回答1: The simplest way to reduce the cost is by reducing the downloads . You can do that by caching the data on local storage as much

问题 So for the second last block(newImageRef.putData), I can define downloadURL as String?, but then I get __SwiftValue error at the last block (newImageRef.putData1). And even defining downloadURL as a string seems dangerous because looking at the documentation https://firebase.google.com/docs/reference/swift/firebasestorage/api/reference/Classes/StorageMetadata it seems to be used as a URL integral to the function. Other than these terminal error, there is a yellow error that warns Value

问题 i want to delete the entire record in the database using the child value entered this is the code i tried for it <body> User Name: <input type="text" name="user_name" id="user_name" placeholder="enter text"/><br><br> Enter Email: <input type="text" name="user_name" id="user_name2" placeholder="enter email" /> <br><br> <input type="button" value="Save" onclick="save_user();" /> <input type="button" value="delete" onclick="delete_user();" /> <script> var tblUsers = document.getElementById('tbl