我正在尝试使用图片上传 API 时遇到以下错误
127.0.0.1 "POST //upload/image HTTP/1.1" 500 -
Traceback (most recent call last):
File "D:\c_code\projects\python_api\.venv\lib\site-packages\flask\app.py", line 2463, in __call__
return self.wsgi_app(environ, start_response)
File "D:\c_code\projects\python_api\.venv\lib\site-packages\flask\app.py", line 2449, in wsgi_app
response = self.handle_exception(e)
File "D:\c_code\projects\python_api\.venv\lib\site-packages\flask_cors\extension.py", line 161, in wrapped_function
return cors_after_request(app.make_response(f(*args, **kwargs)))
File "D:\c_code\projects\python_api\.venv\lib\site-packages\flask_restful\__init__.py", line 272, in error_router
return original_handler(e)
File "D:\c_code\projects\python_api\.venv\lib\site-packages\flask\app.py", line 1866, in handle_exception
reraise(exc_type, exc_value, tb)
File "D:\c_code\projects\python_api\.venv\lib\site-packages\flask\_compat.py", line 38, in reraise
raise value.with_traceback(tb)
File "D:\c_code\projects\python_api\.venv\lib\site-packages\flask\app.py", line 2446, in wsgi_app
response = self.full_dispatch_request()
File "D:\c_code\projects\python_api\.venv\lib\site-packages\flask\app.py", line 1951, in full_dispatch_request
rv = self.handle_user_exception(e)
File "D:\c_code\projects\python_api\.venv\lib\site-packages\flask_cors\extension.py", line 161, in wrapped_function
return cors_after_request(app.make_response(f(*args, **kwargs)))
File "D:\c_code\projects\python_api\.venv\lib\site-packages\flask_restful\__init__.py", line 272, in error_router
return original_handler(e)
File "D:\c_code\projects\python_api\.venv\lib\site-packages\flask\app.py", line 1820, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "D:\c_code\projects\python_api\.venv\lib\site-packages\flask\_compat.py", line 38, in reraise
raise value.with_traceback(tb)
File "D:\c_code\projects\python_api\.venv\lib\site-packages\flask\app.py", line 1949, in full_dispatch_request
rv = self.dispatch_request()
File "D:\c_code\projects\python_api\.venv\lib\site-packages\flask\app.py", line 1935, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "D:\c_code\projects\python_api\.venv\lib\site-packages\flask_restful\__init__.py", line 468, in wrapper
resp = resource(*args, **kwargs)
File "D:\c_code\projects\python_api\.venv\lib\site-packages\flask\views.py", line 89, in view
return self.dispatch_request(*args, **kwargs)
File "D:\c_code\projects\python_api\.venv\lib\site-packages\flask_restful\__init__.py", line 583, in dispatch_request
resp = meth(*args, **kwargs)
File "D:\c_code\projects\python_api\.venv\lib\site-packages\flask_jwt_extended\view_decorators.py", line 108, in wrapper
return fn(*args, **kwargs)
File "D:\c_code\projects\python_api\resources\image.py", line 24, in post
data = image_schema.load(request.files)
File "D:\c_code\projects\python_api\.venv\lib\site-packages\marshmallow\schema.py", line 723, in load
data, many=many, unknown=unknown, postprocess=True
File "D:\c_code\projects\python_api\.venv\lib\site-packages\marshmallow\schema.py", line 861, in _do_load
unknown=unknown,
File "D:\c_code\projects\python_api\.venv\lib\site-packages\marshmallow\schema.py", line 669, in _deserialize
index=index,
File "D:\c_code\projects\python_api\.venv\lib\site-packages\marshmallow\schema.py", line 493, in _call_and_store
value = getter_func(data)
File "D:\c_code\projects\python_api\.venv\lib\site-packages\marshmallow\schema.py", line 662, in <lambda>
val, field_name, data, **d_kwargs
File "D:\c_code\projects\python_api\.venv\lib\site-packages\marshmallow\fields.py", line 342, in deserialize
output = self._deserialize(value, attr, data, **kwargs)
TypeError: _deserialize() got an unexpected keyword argument 'partial'
File "D:\c_code\projects\python_api\resources\image.py", line 24, post
的代码如下
from marshmallow import Schema, fields
from werkzeug.datastructures import FileStorage
from marshmallow import Schema, fields
from werkzeug.datastructures import FileStorage
class FileStorageField(fields.Field):
default_error_messages = {
"invalid": "Not a valid image."
}
def _deserialize(self, value, attr, data) -> FileStorage:
if value is None:
return None
if not isinstance(value, FileStorage):
self.fail("invalid")
return value
class ImageSchema(Schema):
image = FileStorageField(required=True)
代码在调用 API 图片上传时工作正常,但出现错误。 我正在使用 flask 棉花糖、 flask 上传、打包。
最佳答案
从 marshmallow 3 开始,_deserialize
可能会收到 partial
kwarg。
每个自定义字段都应该复制 Field._deserialize
签名并接受未知的 kwargs。
def _deserialize(
self,
value: typing.Any,
attr: typing.Optional[str],
data: typing.Optional[typing.Mapping[str, typing.Any]],
**kwargs
):
像这样更改您的代码以静默接受 kwargs:
def _deserialize(self, value, attr, data, **kwargs) -> FileStorage:
if value is None:
return None
关于python - 类型错误 : _deserialize() got an unexpected keyword argument 'partial' in marshmallow,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/60740315/
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