How to get data from firebase by using uid

Question

In my app I want the user name to be displayed after user logins for that i have used the Uid but I am not recieving data from firebase

Using RN>57.8

this is my code:

componentDidMount(){ firebase.database() .ref('users/'+this.state.uid) .on('value',(snapshot)=>{ const name1 = snapshot.val().name; alert(name1) }) }

and

componentDidMount(){ firebase.database() .ref(`users/${this.state.uid}`) .on('value',(snapshot)=>{ const name1 = snapshot.val().name; alert(name1) }) }

I want to show alert message with the name of the user but it is not working whereas if i write the path directly as shown below i am able to get the alert

Example:

.ref('users/ALM5456N3NNN35HFR56L')

Ritviz Sharma · Accepted Answer · 2019-01-25 07:29:24Z

2

Use it like this to get the name

firebase.database() .ref(`users/${this.state.uid}`).on('value',(snapshot)=>{ console.log(snapshot.val()); })

edited Jan 25, 2019 at 7:29

answered Jan 25, 2019 at 6:03

Ritviz Sharma

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8 Comments

Ali Alsaggaf Over a year ago

Thanks for your time i tried this just now i got alert null

Ali Alsaggaf Over a year ago

drive.google.com/file/d/13YiCGfsLak_mS5waF-3pIVoX7HBuPhzm/…

Ritviz Sharma Over a year ago

I have modified the answer try doing it like this.

Ali Alsaggaf Over a year ago

i tried no alert showing and getting warning possible unhandled promise rejection (id:0):typeError:null is not an object (evaluating 'userData.name')

Ritviz Sharma Over a year ago

I have modified my answer. Console like this and check what are you getting in this.

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