CODEWITHSUNDEEP
fluttergoogle-cloud-firestorestream
AhabLives
AhabLives

Reputation: 1468

Flutter: How to stream only one field in a firestore document?

How do you, or is it even possible to, stream only one field in a firestore document. I would like to stream the data for only one key value which is a List? For example:

DocumentSnapshot {
    'firstname':'Joe',
    'lastname':'Smith',
    'friendsList': [[email protected], [email protected], [email protected]]
}

Can I stream only the 'friendsList' field or do I have to pull the whole DocumentSnapshot ?

Upvotes: 1

Views: 831

Answers (1)

Doug Stevenson
Doug Stevenson

Reputation: 317798

You can think of a document is an atomic unit. If it's read by the user account, then entire document will always be transferred and cached as a unit. There are no partial document reads.

In the interest of speeding up requests, you might choose to split the contents of a single document into multiple documents among multiple collections, so that only the minimal amount of information is fetched for different use cases that require different fields. Splitting up a document like this is also good for protecting different fields with different security rules.

Upvotes: 5

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