Alex, thank you very much.
I find if g1 belong g2, g2 will belong g1 automatically, but that is not right.
should I rewrite models like this one?
groups = models.ManyToManyField('self', symmetrical=False)
On Wed, Feb 11, 2009 at 10:40 PM, Alex Gaynor <alex.gay...@gmail.com> wrote:
>
>
> On Wed, Feb 11, 2009 at 2:29 AM, khsing <khsing...@gmail.com> wrote:
>>
>> class user(models.Model):
>> username = models.CharField(max_length=50)
>>
>> class group(models.Model):
>> groupname = models.CharField(max_length=50)
>> users = models.ManyToManyField(user)
>> groups = models.ManyToManyField('self')
>>
>> there are my models.
>>
>> I have no idea to get a complete group list in such models, anyone
>> give me a suggestion.
>>
>> example:
>> user U1 belong group G1 and group G1 belong G2, I want get G1 and G2 via
>> U1.
>> like this
>>
>> def get_all_groups(user):
>> return all_groups
>>
>> >>>get_all-groups(U1)
>> [G1, G2]
>>
>> that all.
>>
>> Thank.
>>
>>
>>
>>
>> On Tue, Feb 10, 2009 at 12:18 PM, khsing <khsing...@gmail.com> wrote:
>> > Alex, thanks, now it work.
>> >
>> > now have a new problem is may a group can contain itself, this will be a
>> > loop.
>> >
>> > how to avoid this condition?
>> >
>> >
>> >
>> > On Tue, Feb 10, 2009 at 11:28 AM, Alex Gaynor <alex.gay...@gmail.com>
>> > wrote:
>> >>
>> >>
>> >> On Mon, Feb 9, 2009 at 10:18 PM, khsing <khsing...@gmail.com> wrote:
>> >>>
>> >>> I want design a group that can contain other groups, and one group can
>> >>> belong many groups.
>> >>>
>> >>> I write such code below, but not right.
>> >>>
>> >>> class Group(models.Model):
>> >>> groups = models.ManyToManyField(Group)
>> >>>
>> >>> any suggestion?
>> >>>
>> >>> or how to design such a group.
>> >>>
>> >>> thanks.
>> >>>
>> >>> --
>> >>> A man live in jail and want to break.
>> >>> http://blog.khsing.net
>> >>>
>> >>>
>> >>
>> >> To have a relationship with oneself you do
>> >>
>> >> ManyToManyField("self")
>> >>
>> >> --
>> >> "I disapprove of what you say, but I will defend to the death your
>> >> right to
>> >> say it." --Voltaire
>> >> "The people's good is the highest law."--Cicero
>> >>
>> >> >>
>> >>
>> >
>> >
>> >
>> > --
>> > A man live in jail and want to break.
>> > http://blog.khsing.net
>> >
>>
>>
>>
>> --
>> A man live in jail and want to break.
>> http://blog.khsing.net
>>
>>
>
> you could probably do something like:
> def all_groups(user):
> groups = set()
> for group in user.groups.all():
> groups.add(group)
> for other_group in group.groups.all():
> groups.add(other_group)
> return groups
>
> --
> "I disapprove of what you say, but I will defend to the death your right to
> say it." --Voltaire
> "The people's good is the highest law."--Cicero
>
> >
>
--
A man live in jail and want to break.
http://blog.khsing.net
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Django users" group.
To post to this group, send email to django-users@googlegroups.com
To unsubscribe from this group, send email to
django-users+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/django-users?hl=en
-~----------~----~----~----~------~----~------~--~---
