Query Firebase using Map value, Flutter

Question

I'm trying to query to my Firebase collection using the value inside of Array. I'm using arrayContains and then passing the value like shown in the code, but after querying, it returns a length of 0.

FirebaseFirestore.instance
.collection('chatrooms')
.where('users.0', arrayContains: {'studentid':'1WINXTQdshhn4jLfhMWWaZNNdL32'})
.get();

Here's an image of my database.

Database Collection

prahack · Accepted Answer · 2021-01-30 08:02:21Z

1

This cannot be done using array-contains. You must use the entire student object to query using array-containing. This query tries to find {'studentid':'1WINXTQdshhn4jLfhMWWaZNNdL32'} object inside the array of users.0 field. Read more about this here https://firebase.google.com/docs/firestore/query-data/queries#array_membership.

answered Jan 30, 2021 at 8:02

prahack

1,6993 gold badges21 silver badges25 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Query Firebase using Map value, Flutter

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related