Re: Newbie : Object copy - weird error :-)

Can you format your code or post it on a gist?

On Wed, Jun 27, 2018 at 00:17 <mickael.barbo@gmail.com> 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

;-)

--
You received this message because you are subscribed to the Google Groups "Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscribe@googlegroups.com.
To post to this group, send email to django-users@googlegroups.com.
Visit this group at https://groups.google.com/group/django-users.
To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/ac3a7a8f-f878-48b3-943a-eb47f6b03e7e%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

--
You received this message because you are subscribed to the Google Groups "Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscribe@googlegroups.com.
To post to this group, send email to django-users@googlegroups.com.
Visit this group at https://groups.google.com/group/django-users.
To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/CAMv51WTXNjz1Px76v5_7P%2BMmUnbHH8Yw%2BdwJPR%2BX7ccorHPZBA%40mail.gmail.com.
For more options, visit https://groups.google.com/d/optout.