Firestore 中的路径

Question

I want to get file from firestore with path: images/flowers. How can I get into 'flowers' subcollection? I need it as snapshots.

I tired this but didn't work:

Firestore.instance
            .collection('images')
            .document()
            .collection('others')
            .snapshots()

I want to get path to the subcollection 'others':

Answer 1

You have to specify what document you want to get. If you want the 'others'-collection for all of them you first need to get the previous collection and iterate over them or better yet, set up a StreamBuilder.

Answer 2

If you want to build a path to a subcollection, you need to know all of the path components. Right now, you are ignoring the required document ID under which the subcollection is nested. Passing no arguments to document() will just generate a random document ID, which obviously won't exist at the time of the query. If you don't know the full path to a collection, then you won't be able to query it.