Thanks very very very much !
Le mardi 17 mai 2016 14:51:05 UTC+2, Michal Petrucha a écrit :
>
> On Tue, May 17, 2016 at 05:44:24AM -0700, François GUÉRIN wrote:
> > Hi all,
> >
> > I'm a django application dev for a few years, so I'm pretty familiar
> with
> > it. I have a problem with a new django 1.9.6 application. I'm writing a
> > directory app, with a main model named "Association", which have 4 m2m
> > related fields :
> >
> >
> > class Association(models.Model):
> > # ... other fields ...
> >
> > #: Activity domains.
> > #: note:: An association **MUST** have at least 1 activity, it can
> have some more.
> > domains = models.ManyToManyField(Domain, verbose_name=_('domains'),
> related_name='domain__associations')
> >
> > #: Targeted age groups
> > target_groups = models.ManyToManyField(TargetGroup,
> verbose_name=_('target groups'),
> > blank=True,
> related_name='target_group__associations')
> >
> > #: Locations where the activities of the association can take places
> > locations = models.ManyToManyField(Location,
> verbose_name=_('locations'),
> > blank=True,
> related_name='location__associations')
> >
> > #: Affiliations
> > affiliations = models.ManyToManyField(Affiliation,
> verbose_name=_('affiliations'), blank=True,
> >
> related_name='affiliation__associations')
> >
> >
> > When I try to access to related data; I always have (aka, for each
> related
> > field) a Field Error exception, has given in title. The keyword allways
> > asks for the field name in the relation table, and the field list
> displayed
> > are from the target table of the relation. Trlated tables are pretty
> simple
> > (name, description), but domain is a mptt table.
> >
> > With factory_boy, I can create new `Association` items and insert new
> > relations to my related items, but I can't display them.
> >
> > I'm stuck with this problem for a few days, that why I ask... I really
> > don't see what I didn't do... or understand !
> >
> > Thanks for your help !
>
> Hi François,
>
> At a quick glance, it seems the error is that you put double
> underscores into related_names. That cannot work, because
> related_names should follow the same restrictions as regular field
> names, and field names cannot contain double underscores, since Django
> uses those to separate fields when traversing relations.
>
> Cheers,
>
> Michal
>
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