Hi 赖信桃,
Sorry for formating problem. Here it is
class AbstractDataModel(models.Model):
xxx
class Meta:
abstract = True
def __iter__(self):
return iter([self.xxx, self.yyy, self.zzz, self.aaa,
self.qqq, self.mode_bbb])
class DataModel(AbstractDataModel):
pass
class DataModelArchive(AbstractDataModel):
# https://stackoverflow.com/questions/21699707/python-how-
to-copy-all-attibutes-from-base-class-to-derived-one
def __init__(self, source=None):
if source is not None:
self.__dict__.update(source.__dict__)
2018-06-27 4:34 GMT+02:00 赖信桃 <[email protected]>:
> Can you format your code or post it on a gist?
> On Wed, Jun 27, 2018 at 00:17 <[email protected]> wrote:
>
>> Hi all :-)
>>
>> I'd like to archive some data.
>>
>> I did that :
>>
>> class AbstractDataModel(models.Model):
>>
>> xxx
>>
>>
>> class Meta:
>> abstract = True
>>
>>
>> def __iter__(self):
>>
>> return iter([self.xxx, self.yyy, self.zzz, self.aaa,
>> self.qqq, self.mode_bbb])
>>
>>
>> class DataModel(AbstractDataModel):
>>
>>
>> pass
>>
>>
>> class DataModelArchive(AbstractDataModel):
>> # https://stackoverflow.com/questions/21699707/python-how-
>> to-copy-all-attibutes-from-base-class-to-derived-one
>> def __init__(self, source=None):
>> if source is not None:
>> self.__dict__.update(source.__dict__)
>>
>>
>>
>> But when I want to access data in DataModelArchive, like
>> DataModelArchive.objects.all() for example,
>> I get
>>
>>
>> Traceback (most recent call last):
>> File "/home/.../tests.py", line 1090, in test_archive
>> print(DataModelArchive.objects.all())
>> File "/home/.../venv/lib/python3.6/site-packages/django/db/
>> models/query.py", line 248, in __repr__
>> data = list(self[:REPR_OUTPUT_SIZE + 1])
>> File "/home/.../venv/lib/python3.6/site-packages/django/db/
>> models/query.py", line 272, in __iter__
>> self._fetch_all()
>> File "/home/.../venv/lib/python3.6/site-packages/django/db/
>> models/query.py", line 1179, in _fetch_all
>> self._result_cache = list(self._iterable_class(self))
>> File "/home/.../venv/lib/python3.6/site-packages/django/db/
>> models/query.py", line 63, in __iter__
>> obj = model_cls.from_db(db, init_list, row[model_fields_start:model_
>> fields_end])
>> File "/home/.../lib/python3.6/site-packages/django/db/models/base.py",
>> line 507, in from_db
>> new = cls(*values)
>> TypeError: __init__() takes from 1 to 2 positional arguments but 11 were
>> given
>>
>>
>>
>> What am I doing wrong ?
>>
>> Thx
>> ;-)
>>
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