In the docs it is stated, that a transaction fails, when:
The transaction read a document that was modified outside of the transaction.
I'm wondering if this also applies to read queries, that might return more than one document (via .where('x', '==', 'y')). Does the transaction still fail, if the Read query would return more results if it was executed again sometime during the transaction?
To illustrate my question, let's say I have a collection of cars with the following Schema:
{
ownerId: string,
make: string,
horsepower: int
...
}
Now I'm querying the cars of a certain owner in a transaction.get() call:
transaction.get(firestore.collection('cars').where('ownerId', '==', '123'))...
Let's say I receive a Snapshot with 2 Cars, based on these cars I want to do some magic in the transaction. During the transaction another car is added for this owner (so it's not part of the initial Snapshot). Will the transaction fail in this case?
PS: I'm not looking for a different solution, the example above is fictitious, I just want to understand how the transaction behaves in this kind of case.
