Need support to Update elements in an array in document in Cloud FireStore

[shashkiranr]

Hi,

I could not update array in Cloud FireStore using flutter. Is there any workaround for this?

Currently I am retrieving all the array values and updating the array field. The updateData changes the entire array and not individual values. Need FieldValue.arrayUnion and FieldValue.arrayRemove support.

Eg code for Android - 

DocumentReference washingtonRef = db.collection("cities").document("DC");

// Atomically add a new region to the "regions" array field.
washingtonRef.update("regions", FieldValue.arrayUnion("greater_virginia"));

// Atomically remove a region from the "regions" array field.
washingtonRef.update("regions", FieldValue.arrayRemove("east_coast"));

Cloud Firestore Version
 cloud_firestore: ^0.7.4

flutter doctor -v
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[✓] Android toolchain - develop for Android devices (Android SDK 28.0.1)
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    • Platform android-28, build-tools 28.0.1
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[shashkiranr]

Is there any workaround for this?

Anyone have any idea ?

[zoechi]

Looks like flutter/plugins#760 is supposed to fix that.

[zoechi]

@shashkiranr this has landed. Is this still an issue?

[engintekin]

this looks fine to me, doesn't have the same update method though, flutter has an updateData method which is taking a map:

washingtonRef.updateData(
  {"regions", FieldValue.arrayUnion(["greater_virginia"])}
);

[no-response]

Without additional information, we are unfortunately not sure how to resolve this issue. We are therefore reluctantly going to close this bug for now. Please don't hesitate to comment on the bug if you have any more information for us; we will reopen it right away!
Thanks for your contribution.
cc @Hixie

[zoechi]

doesn't have the same update method though

is this a problem?

[engintekin]

doesn't have the same update method though

is this a problem?

@zoechi for me this was not intuitive. If you look at the Update a document examples in this page, all the language examples are using docRef.update.

// Update an existing document
DocumentReference docRef = db.collection("cities").document("DC");

// (async) Update one field
ApiFuture<WriteResult> future = docRef.update("capital", true);

[zoechi]

Ok, then lets reopen and let the plugin maintainer decide.

[kroikie]

@shashkiranr

This issue has been moved to firebase/flutterfire#702. Any further collaboration will be done there.

[github-actions]

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.