Question

在我阅读有关身份验证的Django文档之前，我首先创建了User模型，因此我将所有属性放在同一个模型中。所以，后来我尝试将其拆分为用户和用户配置文件。但是当我运行人口脚本时，它表示即使我看到创建它的SQL，也找不到用户配置文件表。

这两个类连接到我导入的User模型。

from django.contrib.auth.models import User

class UserProfile(models.Model):
        user = models.OneToOneField(User)
        profilepic = models.ImageField(blank=True)
        city = models.ForeignKey(City)
        slug = models.SlugField(unique=True)

        def save(self, *args, **kwargs):
            @property
            def avg_rating(self):
                return self.userrating_set.all().aggregate(Avg('rating'))['rating__avg']

    class UserRating(models.Model):
        user = models.ForeignKey(User)
        comment = models.CharField(max_length=500)
        for_username = models.CharField(max_length=128)
        rating = models.IntegerField(default=5)

        def __unicode__(self):
            return unicode(self.rating)

这是问题所在的人口脚本的一部分：

new_user = User.objects.get_or_create(username=username, email=email)[0]
#new_user.profilepic = profile_picture
new_user.firstname = first_name
new_user.secondname = last_name
new_user.save()

new_user_profile = UserProfile.objects.get_or_create(user=new_user, city=created_city)
new_user_profile.slug = username
new_user_profile.save()

这是我在运行脚本时遇到的错误：

Traceback (most recent call last):
  File "C:\Users\bnbih\app_name\populationScript.py", line 108, in <module>
    populate()
  File "C:\Users\bnbih\app_name\populationScript.py", line 101, in populate
    new_user_profile = UserProfile.objects.get_or_create()
  File "C:\python27\lib\site-packages\django\db\models\manager.py", line 92, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "C:\python27\lib\site-packages\django\db\models\query.py", line 422, in get_or_create
    return self.get(**lookup), False
  File "C:\python27\lib\site-packages\django\db\models\query.py", line 351, in get
    num = len(clone)
  File "C:\python27\lib\site-packages\django\db\models\query.py", line 122, in __len__
    self._fetch_all()
  File "C:\python27\lib\site-packages\django\db\models\query.py", line 966, in _fetch_all
    self._result_cache = list(self.iterator())
  File "C:\python27\lib\site-packages\django\db\models\query.py", line 265, in iterator
    for row in compiler.results_iter():
  File "C:\python27\lib\site-packages\django\db\models\sql\compiler.py", line 700, in results_iter
    for rows in self.execute_sql(MULTI):
  File "C:\python27\lib\site-packages\django\db\models\sql\compiler.py", line 786, in execute_sql
    [Finished in 0.8s with exit code 1]cursor.execute(sql, params)
  File "C:\python27\lib\site-packages\django\db\backends\utils.py", line 81, in execute
    return super(CursorDebugWrapper, self).execute(sql, params)
  File "C:\python27\lib\site-packages\django\db\backends\utils.py", line 65, in execute
    return self.cursor.execute(sql, params)
  File "C:\python27\lib\site-packages\django\db\utils.py", line 94, in __exit__
    six.reraise(dj_exc_type, dj_exc_value, traceback)
  File "C:\python27\lib\site-packages\django\db\backends\utils.py", line 65, in execute
    return self.cursor.execute(sql, params)
  File "C:\python27\lib\site-packages\django\db\backends\sqlite3\base.py", line 485, in execute
    return Database.Cursor.execute(self, query, params)
django.db.utils.OperationalError: no such table: mainapp_userprofile

Answer 1

Django＆＃39; MERGE只是向您显示将会运行什么，它不会应用任何更改，您需要运行sqlmigrate

打印指定迁移的SQL。这需要一个活动的数据库连接，它将用于解析约束名称;这意味着您必须针对您希望以后应用它的数据库副本生成SQL。

为什么即使我可以看到它被创建，也会得到“找不到表”？

1 个答案: