Unable to fetch data from firebase but can save data to firebase

[Oshianor]

Issue

Environment

1. Application Target Platform:

both

2. Development Operating System:

windows 10

3. Build Tools:

Android Studio

4. React Native version:

0.55

5. React Native Firebase Version:

4.3.8

6. Firebase Module:

database, auth, core

7. Are you using typescript?

no

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[Oshianor]

Whenever i run this code i get no response unless am just starting the android dev server . Even when i reload my app it still doesnt work.
firebase.database().ref('post').once('value').then(res => console.log(res))

[Ehesp]

Can we see your code usage please? Those screenshots don't really help sorry!

But, failure to read data on both platforms to me would indicate that this is perhaps an issue with your database rules on the Firebase consoles - check your rules, the default ones, for example, require a user to be authenticated.

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[Oshianor]

My database rules are well setup. After much testing i think i understand what the problem is but i have no ideal how to fix it. Whenever i start up my react native android server when my screens are loaded some times they fetch the data while others they don't and that point i have to manually close the app and open it again. NOTE : The android server keeps running while i close the app.

[stale]

Hello 👋, this issue has been automatically marked as stale because it has not had activity for quite some time. Has the issue been fixed, or does it still require the community's attention? This issue may be closed if no further activity occurs. Thank you for your contributions.

[armanatz]

@Ehesp I seem to also be running into the same issue. I am trying to run the same code as @Oshianor but unless I close the application on my emulator and open it again, the code only executes once and never executes again upon subsequent refreshes.

I am running on [email protected] and [email protected]

Any ideas?

[KennethSJiang]

having the same issue here. Didn't have this problem when using web based firebase npm

[csgonutty]

Same issue here, I have to restart the app and emulator in order for the .on() listener to fire.

Im running [email protected] and [email protected]

[dantman]

I was going to report the same issue. React Native Firebase works, but then on Android after a few JS reloads it stops working.

I'm using react-redux-firebase, however I did include this code in my app to verify that this issue is actually in react-native-firebase and not in react-redux-firebase:

firebase.firestore().collection('practice').get()
	.then(data => console.log(data.docs[0].data()))
	.catch(console.error);

Of particular note. I notice that when it's working I get data; when it fails I get no response at all. i.e. It does not fail with an error, it simply never resolves the promise.

And it doesn't start working again until I force quit the app and reopen it.

[kamicodaxe]

The same issue here. Database works on the first load but stops working after dev app refreshes. I observed this issue after updating to RNFIrebase v5.0.0

[gitsad]

I have got the same problem. I need to reload whole app to receive the data on componentDidMount

[Salakar]

Hey all, this should be fixed as part of #1619 - you can give it a go on [email protected] - see the rc1 release notes on GH for the correct Native SDK versions.

For firestore could you please raise a seperate issue so I can track it and work on it there.

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[tzurae]

same here still

[silvafacundo]

I'am having the same problem. I was using the latest react-native-firebase version but then i read that downgrading to 5.2.0 solves the problem. It Solves it until syntax error, once i fix my bundling problem firebase database stops working...
I'm using react-native 0.59.2
On windows 10 and developing for android

[anastely]

@silvafacundo I have the same problem but with "react-native-firebase": "4.3.8",
and I think the syntax is true,

displayCategories = () => {
    const refData = firebase.database().ref("categories");
    var items = [];
    refData.once("value", snapshot => {
      console.log(snapshot.val());
      snapshot.forEach((childSnapshot) => {
        items.push({
          id: childSnapshot.val().id,
          name: childSnapshot.val().name,
        });
      });
      this.setState({ categories: items })
    });
  }

if you solve the problem please tell me!

[silvafacundo]

@silvafacundo I have the same problem but with "react-native-firebase": "4.3.8",
and I think the syntax is true,

displayCategories = () => {
    const refData = firebase.database().ref("categories");
    var items = [];
    refData.once("value", snapshot => {
      console.log(snapshot.val());
      snapshot.forEach((childSnapshot) => {
        items.push({
          id: childSnapshot.val().id,
          name: childSnapshot.val().name,
        });
      });
      this.setState({ categories: items })
    });
  }

if you solve the problem please tell me!

@anastely I think that the problem is coming from Debuggin JS Remotely. I've managed to get it working by not using that option. Debbugin is pretty tedious, but that was the only solution I've could find

[anastely]

@silvafacundo uh oh, it's work after uninstalling the app and stoped Debugging JS Remotely,
but now it's not real-time after delete or insert data I don't see any update on my app and change the .once into .on , any idea?

[silvafacundo]

@anastely Uhmmm... for me it's working fine, make sure that you are updating the correct path, and that is updating at console.firebase.google.com.
If it isn't updating, catch for errors of all your firebase database references and check your database rules.
If you want attach your files and database structure and rules so I can have a better idea