Hi all!
I have two models, Person and License.
class License(models.Model):
number = models.IntegerField(max_length=10)
class Person(models.Model):
name = models.CharField(max_length=30)
license = models.ForeignKey(License,verbose_name="Centro di
costo",blank=True,null=True)
class PersonAdmin(admin.ModelAdmin):
list_display = ('name', 'license')
ordering = ('name','license')
list_filter = ('name','license')
As you can see, a new person can be added with no license at all:
"blank=True,null=True" options. That's what I want.
In my admin panel I get the list of all the persons I have added. I
wish I could filter or order this list so that I get all the persons
that have no license.
The point is, if I use "blank=True,null=True" I'm not allowed to have
this filtering/ordering in my admin panel. (The table I get in the
admin panel can't be ordered by the column "license".)
If I only use the "blank=True" option, then I am allowed to order by
license but no "empty" values are then allowed when adding a new
person. This way, each person must have a license, which is not the
case.
Well, I guess I could use a not-existing license number instead of
null. For example 0000000000 instead of NULL. But it seems tricky and
I might need that number in the future.
How can I solve this?
Thanks, Fabio.
--
Fabio Natali
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