问题
I upgraded sqlalchemy from 0.7 to 0.9.6. After upgrade I am getting the following error:
TypeError
TypeError: filter_by() takes exactly 1 argument (2 given)
howerver before it was working without any issue. How can I manage that issue?
回答1:
Without seeing code, obviously you are calling filter_by wrong. filter_by takes only the implicit self (the 'exactly 1 argument' meaning exactly 1 positional argument) and optional keyword arguments. You are providing filter_by another positional argument, possibly a dictionary.
The syntax is:
query.filter_by(column1=value, column2=value)
Whereas for filter:
query.filter(Model.column1 == value, Model.column2 == value)
来源：https://stackoverflow.com/questions/24762664/sqlalchemy-typeerror-filter-by-takes-exactly-1-argument-2-given