remove flask upper pin #411
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* the test raises a permission denied error. this is then handled by the UOW by rolling back the session. this rollback also removes the test data from the session. the testdata is then not existing anymore for the following up test cases. moving those three in different test functions solves the problem. * another solution would be to find out to only roll back the last savepoint but at the moment of the rollback no savepoint is open so the whole session will be rolledback.
* the problem was that with sqlalchemy some strange rollback happened since the exception was raised. * with this change the re raise is not necessary anymore
* create a forward change to be compatible with sqlalchemy >= 2.0 and flask-sqlalchemy >= 3.0 * the biggest change is to go away from commit driven approach. in sqlalchemy it is more done with transactions. * a explicit call of a commit triggers a COMMIT event and writes to the database and therefore it couldn't be rolledback anymore
* this change should not be necessary, investigate more to find the real problem
* more thought should be given to this
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