firebase-realtime-database

问题 I'm developing an application that updates Firebase data in realtime to React. What I want to do is that a user updates the state in the app, at the same time it should be updated for another user. I have built it done but it continually renders renderStatus() and it's too slow. I want to make it updated once RDB data updated. class Status extends Component { constructor(props) { super(props); this.state = { to_status: false, from_status: false }; } // change the state in RDB handleSatus = ()

问题 I'm developing an application that updates Firebase data in realtime to React. What I want to do is that a user updates the state in the app, at the same time it should be updated for another user. I have built it done but it continually renders renderStatus() and it's too slow. I want to make it updated once RDB data updated. class Status extends Component { constructor(props) { super(props); this.state = { to_status: false, from_status: false }; } // change the state in RDB handleSatus = ()

问题 I'm trying to build a custom app into aosp build which uses Firebase database. I've included the firebase database( com.google.firebase.firebase_database ) along with all it's compile dependencies in Android.bp and build process is a success. However, when I launch the app, I always get this exception java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process com.package.name. Make sure to call FirebaseApp.initializeApp(Context) first. I have tried calling it in

问题 I am using firebase realtime database with firebase anonymous login. When I use the below private rules to secure the firebase realtime database . I get Permission denied error on my client when an anonymously logged in user tries to save data to firebase realtime database . How can I get over this error ? Note: I don't want to use public rules and I want to use firebase anonymous login. Private rules: Firebase realtime database rules that allows only authenticated users to read and write

问题 I am using firebase realtime database with firebase anonymous login. When I use the below private rules to secure the firebase realtime database . I get Permission denied error on my client when an anonymously logged in user tries to save data to firebase realtime database . How can I get over this error ? Note: I don't want to use public rules and I want to use firebase anonymous login. Private rules: Firebase realtime database rules that allows only authenticated users to read and write

问题 I am using firebase realtime database with firebase anonymous login. When I use the below private rules to secure the firebase realtime database . I get Permission denied error on my client when an anonymously logged in user tries to save data to firebase realtime database . How can I get over this error ? Note: I don't want to use public rules and I want to use firebase anonymous login. Private rules: Firebase realtime database rules that allows only authenticated users to read and write

问题 Working with Firebase in a Unity project, for a simple highscore, I stumbled on problems when doing a query. In editor, everything works like a charm (Editor does not have persistence) On devices (with persistence enabled) the troubles begin. Query is showing cached Firebase data, so it is only correct on first ever call in the client, and then when Firebase sees it fit to sync (maybe never, since there is no eventhandler) However, looking for a solution, there is no way to force an update of

问题 Working with Firebase in a Unity project, for a simple highscore, I stumbled on problems when doing a query. In editor, everything works like a charm (Editor does not have persistence) On devices (with persistence enabled) the troubles begin. Query is showing cached Firebase data, so it is only correct on first ever call in the client, and then when Firebase sees it fit to sync (maybe never, since there is no eventhandler) However, looking for a solution, there is no way to force an update of

问题 For a new project we want to experiment with Firebase Database, the idea is to store SEO, Product, User Preferences and so on. We are expecting that the SEO data will be the bigger space consumer and the client doesn't need to save this information locally as will be only used for statistical purposes Is it possible to enable Firebase Database Persistence only on certain nodes and exclude others? Thanks for your help 回答1: Persistence can only be configured all or nothing. This is true for

问题 I have the following structure within my firebase realtime database: artists ArtistID name listOfPaintings PaintingID1 PaintingID2 paintings (there can be PaintingID1 copies price PaintingID2 copies price ... PaintingIDX copies price Now I want to listen for changes of specific paintingIDs and specific ArtistIDs. For example I want to listen to PaintingID1, PaintingID6, PaintingID7, PaintingID11. My repository code so far: override fun observeThisPainting(painting: Painting,