>
> On Tue, Jul 19, 2011 at 2:58 PM, Andre Terra <andre...@gmail.com> wrote:
>
>> Hello, everyone
>>
>> Assume the following models (dpaste.com [1]):
>>
>> class Account(models.Model):
>> """
>> Account model for categorizing entries from each SAP import,
>> and eventually sorting, grouping, filtering data.
>>
>> """
>> code = models.CharField(max_length=255, primary_key=True)
>>
>> group = models.ForeignKey('AccountGroup', blank=True, null=True,
>> related_name='groups')
>>
>> description = models.CharField(max_length=512, blank=True, null=True)
>>
>>
>> class AccountGroup(models.Model):
>> name = models.CharField(max_length=512, blank=True, null=True,
>> verbose_name=_('Name'))
>>
>> parent = models.ForeignKey('AccountGroup', blank=True, null=True,
>> related_name='children')
>>
>> is_subgroup = models.BooleanField(default=False, editable=False)
>>
>> def save(self, *args, **kwargs):
>> self.is_subgroup = False
>>
>> if self.parent is not None:
>> self.is_subgroup = True
>>
>> return super(AccountGroup, self).save(*args, **kwargs)
>>
>> I would like to be able to manually specify an order for AccountGroups in
>> relation to their siblings, so that I can have a final result of something
>> like the following pic (which describes a set of groups and accounts, with
>> the latter being the rightmost, M000000000-format codes.
>>
>> http://img200.imageshack.us/img200/9423/groupsandaccounts.png
>>
>>
>> As you can see from the picture, accounts can be located under any number
>> of groups, and neither Accounts nor AccountGroups are not sorted naturally.
>>
>> Short of using something like django-treebeard[3], how can I write a
>> solution for this use case?
>>
>> Thanks in advance for all your help!
>>
>>
>> Cheers,
>> André Terra
>>
>>
>> [1] http://dpaste.com/hold/571566/
>> [2]
>> https://docs.djangoproject.com/en/dev/ref/models/fields/#commaseparatedintegerfield
>> [3] https://tabo.pe/projects/django-treebeard/docs/1.52/
>>
>>
>
Well, a pre-order algorithm like MPTT - as provided by django-treebeard or
django-mptt - *is* the way to go here. You don't say why you don't want to
go down that route - what's your objection?
--
DR.
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