Firestore doc Update with Merge true using Admin SDK creates new document?

[Deependra Solanky]

Last week while working on Cloud Firestore using Admin SDK, I accidentally forget to replace .update with .set with merge true option and to my surprise the query worked and document got created. I removed merge:true and then I got document not exists error. I tested it again with merge:true and document created again. I could not find anything about this in documentation. Requesting Firebase team to explain this behaviour. I posted this on stackoverflow (https://stackoverflow.com/questions/60899399/firestore-doc-update-with-merge-true) but I was advised to post here.

let query = userRolesRef .doc(user).update( { isDeliveryPerson:true }, { merge: true } );

[Kato Richardson]

Hello Deependra,

The API reference is essentially the contract for what behavior you should expect; that's here. Given that the behavior doesn't match that, and assuming you're on the latest SDK version, this should be filed as a bug in the GitHub repo.

Thanks for finding this and sharing!

☼, Kato

On Wed, Apr 1, 2020 at 7:53 AM Deependra Solanky <sol...@gmail.com> wrote:

Last week while working on Cloud Firestore using Admin SDK, I accidentally forget to replace .update with .set with merge true option and to my surprise the query worked and document got created. I removed merge:true and then I got document not exists error. I tested it again with merge:true and document created again. I could not find anything about this in documentation. Requesting Firebase team to explain this behaviour. I posted this on stackoverflow (https://stackoverflow.com/questions/60899399/firestore-doc-update-with-merge-true) but I was advised to post here.

let query = userRolesRef .doc(user).update( { isDeliveryPerson:true }, { merge: true } );

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