Django和nosetests：DoesNotExist：<object>匹配查询不存在

Question

我只是在django上启动一个小应用程序。目前，它的目标仅仅是管理测试人员（即用户）和团队。这里是我的model.py：

from django.db import models 

class Team(models.Model): 
    name = models.CharField(max_length=200) 
    def __unicode__(self): 
     return self.name 
    def get_testers(self): 
     return self.tester_set.all() 

class Tester(models.Model): 
    team = models.ForeignKey(Team) 
    visa = models.CharField(max_length=3) 
    privileged = models.BooleanField() 
    def __unicode__(self): 
     return self.visa 

我想写一个测试“get_testers”函数。 这就是：

from models import Team, Tester 
def testTeamGetTesters_test(): 
    t = list(Team.objects.get(id=2L).get_testers()) 

    a = Tester(visa = 'a', privileged = True) 
    b = Tester(visa = 'b', privileged = True) 

    assert(t[0].visa == a.visa and t[0].privileged == a.privileged and t[1].visa == b.visa and t[1].privileged == b.privileged) 

但是当我运行：

$ python manage.py test tmg 

我得到这个错误：

nosetests --verbosity 1 tmg 
E 
====================================================================== 
ERROR: tempsite.tmg.tests.testTeamGetTesters_test 
---------------------------------------------------------------------- 
Traceback (most recent call last): 
    File "/usr/lib/pymodules/python2.6/nose/case.py", line 183, in runTest 
    self.test(*self.arg) 
    File "/home/charlie/code/tempsite/../tempsite/tmg/tests.py", line 8, in testTeamGetTesters_test 
    t = list(Team.objects.get(id=2L).get_testers()) 
    File "/usr/lib/pymodules/python2.6/django/db/models/manager.py", line 132, in get 
    return self.get_query_set().get(*args, **kwargs) 
    File "/usr/lib/pymodules/python2.6/django/db/models/query.py", line 341, in get 
    % self.model._meta.object_name) 
DoesNotExist: Team matching query does not exist. 

所以，我写了几乎相同的测试，而是直接可运行：

from models import Team, Tester 

t = list(Team.objects.get(id=2L).get_testers()) 

a = Tester(visa = 'a', privileged = True) 
b = Tester(visa = 'b', privileged = True) 

print "%r" % (t[0].visa == a.visa and t[0].privileged == a.privileged and t[1].visa == b.visa and t[1].privileged == b.privileged) 

...和w母鸡我运行它：

$ python tests.py 
True 

这是非常混乱。我检查了数据库，对象都完全恢复，但我仍然得到这个错误...

Answer 1

你创建团队对象在你的测试中有id 2的地方？不要忘记测试从一个空白数据库开始。