Using multiple instances of Firestore in the same project

[John Pereira]

Hello all,

I'm building a new app in Firebase and Firestore. The app is built around the concept of Teams and most of the data is scoped within a Team (think Trello where a project is owned by a Team and Team members collaborate on the project)

One of the features I'm considering is having user data for a Team be silo'd within one instance of a Firestore DB. So each Team would have its own instance of Firestore. Is this possible to do?

[Samuel Stern]

Hey John,.

Right now you can only have one Firestore database per project.  In the future we could enable multiple databases (you can see that the protocol already supports this) but it's not in our immediate plans.

However you may be able to use subcollections to simulate this type of structure.  Imagine a top-level collection called "teams" where each team has a document.  You can then create totally separate subcollection trees under each team document.  This will have similar performance to using totally separate databases, but you'll approach the system limits sooner since the load of all teams would be combined.

- Sam

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[Guy Rom]

If you are good with subcollections like advised go for it.
In my case I needed 2 separate DBs which requires 2 projects but it can be done. However, you'll need to provide the credentials of the second project to the function in order to access the second DB.