Create view on another view

Working with Data
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1

Hello all,
I create a view A by a lookup pipeline which do a joint search with two collections, A1 and A2, and I can see the view A contains some data from A1 and A2, and if I change some data in A1 or A2, the data in view A will be changed accordingly. Then I create a view B, view B is created by a lookup pipeline which do a joint search from collection B1 and view A, currently, I can see the data appears in view A, but not in view B, what would be the problem?

Thanks,
James

2

Hello, more information: I use community version 4.0. I read the document in https://docs.mongodb.com/manual/reference/method/db.createView/