__mapper_args__ = {"order_by": country_code}报错unexpected keyword argument 'order_by'，是什么原因呢
慕慕9595314
2021-04-07 18:10
Traceback (most recent call last):
File "D:\Anaconda3\envs\fastapi\lib\runpy.py", line 194, in _run_module_as_main
return _run_code(code, main_globals, None,
File "D:\Anaconda3\envs\fastapi\lib\runpy.py", line 87, in _run_code
exec(code, run_globals)
File "c:\Users\withr\.vscode\extensions\ms-python.python-2021.3.680753044\pythonFiles\lib\python\debugpy\__main__.py", line 45, in <module>
cli.main()
File "c:\Users\withr\.vscode\extensions\ms-python.python-2021.3.680753044\pythonFiles\lib\python\debugpy/..\debugpy\server\cli.py", line 444, in main
run()
File "c:\Users\withr\.vscode\extensions\ms-python.python-2021.3.680753044\pythonFiles\lib\python\debugpy/..\debugpy\server\cli.py", line 285, in run_file
runpy.run_path(target_as_str, run_name=compat.force_str("__main__"))
File "D:\Anaconda3\envs\fastapi\lib\runpy.py", line 265, in run_path
return _run_module_code(code, init_globals, run_name,
File "D:\Anaconda3\envs\fastapi\lib\runpy.py", line 97, in _run_module_code
_run_code(code, mod_globals, init_globals,
File "D:\Anaconda3\envs\fastapi\lib\runpy.py", line 87, in _run_code
exec(code, run_globals)
File "run.py", line 12, in <module>
from coronavirus import applications
File "E:\SyncWorkspace\Code\PY\fastapi\fastapi_covid19\coronavirus\__init__.py", line 8, in <module>
from .main import applications
File "E:\SyncWorkspace\Code\PY\fastapi\fastapi_covid19\coronavirus\main.py", line 13, in <module>
from coronavirus import crud, schemas
File "E:\SyncWorkspace\Code\PY\fastapi\fastapi_covid19\coronavirus\crud.py", line 9, in <module>
from coronavirus import models, schemas
File "E:\SyncWorkspace\Code\PY\fastapi\fastapi_covid19\coronavirus\models.py", line 16, in <module>
class City(Base):
File "D:\Anaconda3\envs\fastapi\lib\site-packages\sqlalchemy\orm\decl_api.py", line 75, in __init__
_as_declarative(reg, cls, dict_)
File "D:\Anaconda3\envs\fastapi\lib\site-packages\sqlalchemy\orm\decl_base.py", line 126, in _as_declarative
return _MapperConfig.setup_mapping(registry, cls, dict_, None, {})
File "D:\Anaconda3\envs\fastapi\lib\site-packages\sqlalchemy\orm\decl_base.py", line 177, in setup_mapping
return cfg_cls(registry, cls_, dict_, table, mapper_kw)
File "D:\Anaconda3\envs\fastapi\lib\site-packages\sqlalchemy\orm\decl_base.py", line 314, in __init__
self._early_mapping(mapper_kw)
File "D:\Anaconda3\envs\fastapi\lib\site-packages\sqlalchemy\orm\decl_base.py", line 200, in _early_mapping
self.map(mapper_kw)
File "D:\Anaconda3\envs\fastapi\lib\site-packages\sqlalchemy\orm\decl_base.py", line 971, in map
mapper_cls(self.cls, self.local_table, **self.mapper_args),
TypeError: __init__() got an unexpected keyword argument 'order_by'
1回答
-
- duskash
- 2021-10-04 00:10:49
新版本的 sqlalchemy 丢弃了 __mappter_args__ 当中设置的方法
应当用 db.query().order_by() 直接在 Query 对象后面显示地调用 order_by 函数
这节课里, 有一张 City 表 和一张 Data 表, 对应的 crud 方法里面
db.query(models.City).order_by(models.City.province).offset().limit().all()
db.query(models.Data).order_by(models.Data.confirmed)....
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