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How to update a firebase document using Transactions or ID in Flutter?
final _firestore = FirebaseFirestore.instance;
_firestore
.collection("///Here your collection name")
.doc("///Here your Document ID")
.update({'///Field name':/// new value});
Hope this will help you.
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I'm trying to develop a chat app and wanted to know what if there's any way to generate a unique ID between 2 different users.
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I want to upload array of data into firebase using flutter I do not know how to upload array of data from firebase please help me to solve this by providing some examples of codes.
Here is a example to upload data to Firestore using Dart (Flutter):
static example() async {
var array = ["item1", "item2"];
await FirebaseFirestore.instance.ref
.collection("myCollection")
.doc("myDocument")
.set({"myArray": array});
}
Find more about data types and firestore here: https://firebase.google.com/docs/firestore/manage-data/data-types
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Currently, I am writing a cloud function, i need a way to get the device id tokens of some devices, which i have stored in a field of a collection in a document.
How can I access it?
Please help, i'm stuck at this.
You can try code:
firebaseMessaging.getToken().then((token) {
Firestore.instance.collection('collectionName').document(currentUserId).updateData({'pushToken': token});
})
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just wondering how to retrieve data writed by a specific user using angular2 and firebase without using filter and map. if there is a way.
I think that you could use the equalTo query:
var ref = new Firebase('https://something.firebaseio.com/posts');
ref.orderByChild('sender').equalTo('some user').on("child_added", (snapshot) => {
console.log(snapshot.key());
});
In this case, a sender attribute must be present
See this link for more details:
https://www.firebase.com/docs/web/api/query/equalto.html
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when ever the user make login by facebook or google it return data but it does not save it in fields added to registration form like full name and gender and so on , It only save the data into the users table it save the email and username what is the problem and what should i do too please some one give me an answer