there is something really wired about orm.clear_mappers() function.
here is what i did:
1. I used a mapper to add an instance to a session, i.e
session.add(instance)
2. use clear_mappers() to clear all existing mapper
3. define another mapper using mapper(), including a 1:N relationship
in it.
4. after all above step, the new mapping does not have the new 1:N
relationship member in that mapped class.
may be I need to show the code snippet to make it clear. But this is
my first time to post here. I will wait and see.
---Tony
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