CODEWITHSUNDEEP
firebasefluttergoogle-cloud-firestorereal-time-data
randomstudent
randomstudent

Reputation: 73

Changing To Retrieve Data in Real Time

in this code I am able to retrieve data from Firestore once after I starts to run this page. Is it possible to make it run in real time where it will be able to get all the data from Firestore in real time?

Future getMarker() async{
    Firestore.instance.collection('markers').getDocuments().then((myData){
      if(myData.documents.isNotEmpty){
        for (int i = 0; i < myData.documents.length; i++){
          initMarker(myData.documents[i].data, myData.documents[i].documentID);
        }
      }
    });
  }

When i change the getDocuments() to snapshots() then method then() will give out an error stated that then() is not a Stream type. Or is there any approach to this. Thank you in advance.

Upvotes: 0

Views: 100

Answers (1)

Renaud Tarnec
Renaud Tarnec

Reputation: 83093

As explained in the doc, one option is to use the listen method of the Stream returned by the snapshots() method.

The doc also shows an example with another option: using a StreamBuilder which "helps automatically manage the streams state and disposal of the stream when it's no longer used within your app".

Upvotes: 3

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