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我正在使用 South 进行 sqlite3 数据迁移。我的旧架构具有以下 UserProfile 模型:

class UserProfile(models.Model):
    user = models.OneToOneField(User)
    weekOne = models.OneToOneField(WeekOne)
    weekTwo = models.OneToOneField(WeekTwo)
    weekThree = models.OneToOneField(WeekThree)

但我感觉添加了一些新的周,即 weekFour、weekFive、weekSix 等。每周本身就是一个模型,继承自一个通用的 Week 模型。所以 Week 模型的基本原型如下所示:

class WeekOne(Week):
    name = u'Week One'
    exercises = ['squats', 'lunges', 'stairDaysCount', 'skipStairs']
    # Required benchmarks for given exercises
    squatBenchmark = 1000
    lungeBenchmark = 250
    stairDaysCountBenchmark = 3

    totalGoals = 4

我的问题是,我应该在我的数据迁移代码中放入什么样的代码,以便我可以UserProfile用额外的几周填充旧的 s。我有这样的想法:

def forwards(self, orm):
    for user in orm.UserProfile.objects.all():
        user.weekFour = orm.WeekFour()
        user.weekFive = orm.weekFive()
        # etc.

但这似乎不起作用。当我尝试运行架构迁移时出现此错误:

Migration 'my_app:0002_newWeeks' is marked for no-dry-run

后来这个:

DatabaseError: no such column: my_app_userprofile.weekFour_id
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1 回答 1

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只需在终端中运行它

 python manage.py schemamigration myapp --auto

然后

 python manage.py migrate
于 2013-03-28T01:57:53.203 回答