table 'roles_users' is already defined for this MetaData instance

Question

hello iam trying to get a currnet_user information in my views

and i include from users.models import *

then in my code return return current_user;

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Answer 1

TL;DR

• If you encounter this error when trying to register flask blueprint to application, check if Model importing path is consistent across all blueprints where imports the Model

For example

• Blueprint 1: from A.B.C import Model A
• Blueprint 2: from .B.C import Model A (This raises error, importing path should be consistent across all blueprints that imports the same model. So it should be from A.B.C import Model A)

I haven't dig this issue to find out what is the cause, but I guess that SQLAlchemy manages Model with its imported namespace and raise error when different namespace is defined but the models are same.