Firebase Firestore 是否计算同一文档的读取次数？

Question

As I understand, when we call get() on some reference, Firebase gets lastest snapshot of this document from Firestore.

So my question is: If at the beginning of app (for example in some init) I call something like firestore.collection(food).doc(pizza).get().data() and it gives me some Snapshot of this document where I get data.

Lets say, later in app, I call the same reference firestore.collection(food).doc(pizza).get().data() in some side effect of completely different method and read this data again. Before this, the document didn't change.

Will Firebase count this as one or two reads?

Answer 1

Each get() will obtain a new snapshot of the document, as long as there is internet connectivity. If the app is offline, the SDK will attempt to use the local cache instead.

If you want to understand in more detail about how the cache works, read this blog post .