-1

I have a very simple method:

Class Team(models.Model):
    def sides(self):
      return SideNames.objects.filter(team=self)

SideNames is another model defined in the same file as Team,

Which when I try and test:

self.assertEquals(len(t.sides()), 2)

I get the following error:

return SideNames.objects.filter(team=self)

AttributeError: 'NoneType' object has no attribute 'objects'

but if I change the test to be

self.assertEquals(len(SideNames.objects.filter(team=t)), 2)

Then I don't get the error. What's the difference between calling SideNames.objects.filter from the test itself and calling the actual method?

For reference, here are the 2 classes in their entirety.

class Team(models.Model):
    """The model for a football team."""

    class Admin:
            pass

    def __unicode__(self):
            return u'%s' % self.name

    def is_player(self, player):
            """Checks to see if 'player' is a member if this team. Returns True if they are, or False otherwise."""

            try:
                    teamPlayer = TeamPlayers.objects.get(player=player, team=self)
                    return True
            except ObjectDoesNotExist:
                    return False

    def sides(self):
            """Return the side names for this team"""
            return SideNames.objects.filter(team=self)

    def updateSides(self, side_a, side_b):
            """Update the side names"""
            names = SideNames.objects.filter(team=self);

            a = SideNames.objects.get(name = names[0].name)
            a.name = side_a
            a.save()

            b = SideNames.objects.get(name = names[1].name)
            b.name = side_b
            b.save()

    name = models.CharField("Team Name", max_length=255)
    organiser = models.ForeignKey(User)

class SideNames(models.Model):
    """Holds the names of the sides for each team"""

    class Admin:
            pass

    def __unicode__(self):
            """Pretty print the SideNames object"""
            return self.name

    team = models.ForeignKey(Team)
    name = models.CharField(max_length=128)
4

2 に答える 2

1

In the module that defines the test, you're importing the name SideNames from some other module. In the module where that sides method is defined, the name SideNames is not defined or imported.

于 2010-02-13T01:04:32.060 に答える
1

ひょっとして、あなたのテストは次のようなことをしますか?

from myapp import models

...

models.SideNames = None

それが、そのメソッドのコンテキストで SideNames が None であるべき理由について私が考えることができる唯一の説明だからです。

余談ですが、後方関係は Django によって自動的に提供されるため、メソッド自体は無意味ですt.sidenames_set.all()。

于 2010-02-13T12:03:21.200 に答える