I am unable to get a symmetrical, self-referencing ManyToManyField with a
through table to actually be symmetrical, at least through the Admin
interface. I am using Django 3.0 so it looks like the capability is
supported.
Models:
class Contact(models.Model):
last_name = models.TextField(default='', blank=True)
connections = models.ManyToManyField('self',
through='ContactConnection',
symmetrical=True,
blank=True)
def get_connections(self):
return ', '.join([str(p.last_name) for p in self.connections.all()])
class ContactConnection(models.Model):
to_contact = models.ForeignKey(Contact,
related_name='contacts',
on_delete=models.CASCADE,
null=False)
from_contact = models.ForeignKey(Contact,
on_delete=models.CASCADE,
null=False)
comments = models.TextField(default='', blank=True)
Admin:
class ContactConnectionInline(admin.TabularInline):
model = Contact.connections.through
fk_name = 'from_contact'
extra = 0
@admin.register(Contact)
class ContactAdmin(admin.ModelAdmin):
ordering = ('last_name',)
list_display = ['last_name', 'get_connections']
inlines = (ContactConnectionInline)
>From the Admin page, when viewing a Contact, only one-direction of the
ContactConnection relationship is shown which makes sense due to the
fk_name='from_contact attribute fixing the direction.
But it seems that at least the get_connections() method would get both
sides.
Is there a way either through a query or preferably an Inline to show the
Contacts on both sides of the ContactConnection?
Thanks,
Jim
--
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+unsubscr...@googlegroups.com.
To view this discussion on the web visit
https://groups.google.com/d/msgid/django-users/91dad4bc-7eba-461d-89f1-aaf173e80831o%40googlegroups.com.
