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在我第一次尝试使用 django-reversion 时，我正在评估它是否可以在我的模型上执行某些基本的版本检索操作：

在将更改保存到还原范围内的特定字段后，我无法检索特定模型的先前版本列表，如下所示。尝试 reversion.get_for_object() 时，堆栈跟踪中出现以下错误：

DatabaseError: (1146, "Table 'pvtestmatrix.django_content_type' doesn't exist")

Django：v1.3.1

django-reversion：v1.5.7

安装 django-reversion 并成功管理了一个 syncdb：

bash-3.2$ python manage.py syncdb
Creating tables ...
Creating table reversion_revision
Creating table reversion_version
Installing custom SQL ...
Installing indexes ...
No fixtures found.

在 settings.py 中添加了特定于还原的设置：

INSTALLED_APPS = (
    # 'django.contrib.auth',
    # 'django.contrib.contenttypes',
    # 'django.contrib.sessions',
    # 'django.contrib.sites',
    # 'django.contrib.messages',
    'django.contrib.staticfiles',
    'django.contrib.staticfiles',
    'collabgrid.testmatrix',
    'collabgrid.testcase',
    'collabgrid.status',
    'reversion',
)

MIDDLEWARE_CLASSES = (
    'django.middleware.common.CommonMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.transaction.TransactionMiddleware',
    'reversion.middleware.RevisionMiddleware',
)

DATABASES = {
'default': {
    'ENGINE': 'django.db.backends.mysql', 
    'NAME': 'PVTestMatrix',                     
...}
}

模型.py：

...
class Testmatrix(models.Model):
    testmatrixid = models.AutoField(primary_key=True, db_column='TestMatrixId') 
    platform = models.CharField(max_length=60, db_column='Platform', blank=True) 
    ...
    class Meta:
        db_table = u'TestMatrix'
    def __str__(self): 
        return '%s__%s__%s' % (self.productid, self.testmatrixid, self.owner)
...

view.py 片段：

from collabgrid.testmatrix.models import Testmatrix
import reversion

reversion.register(Testmatrix)
tm=Testmatrix.objects.get(pk=729)
with reversion.create_revision():
    tm.platform="AAA"
    tm.save()

version_list = reversion.get_for_object(tm)

堆栈跟踪：

>>> from collabgrid.testmatrix.models import Testmatrix
>>> import reversion
>>> 
>>> reversion.register(Testmatrix)
>>> tm=Testmatrix.objects.get(pk=729)
>>> with reversion.create_revision():
...     tm.platform="AAA"
...     tm.save()
... 
Traceback (most recent call last):
  File "<console>", line 3, in <module>
  File "/Library/Python/2.6/site-packages/reversion/revisions.py", line 290, in __exit__
    self._context_manager.end()
  File "/Library/Python/2.6/site-packages/reversion/revisions.py", line 176, in end
    in manager_context.iteritems()
  File "/Library/Python/2.6/site-packages/reversion/revisions.py", line 175, in <genexpr>
    for obj, data
  File "/Library/Python/2.6/site-packages/reversion/revisions.py", line 602, in <lambda>
    version_data = lambda: adapter.get_version_data(instance, VERSION_CHANGE, self._revision_context_manager._db)
  File "/Library/Python/2.6/site-packages/reversion/revisions.py", line 97, in get_version_data
    content_type = ContentType.objects.db_manager(db).get_for_model(obj)
  File "/Library/Python/2.6/site-packages/django/contrib/contenttypes/models.py", line 38, in get_for_model
    defaults = {'name': smart_unicode(opts.verbose_name_raw)},
  File "/Library/Python/2.6/site-packages/django/db/models/manager.py", line 135, in get_or_create
    return self.get_query_set().get_or_create(**kwargs)
  File "/Library/Python/2.6/site-packages/django/db/models/query.py", line 378, in get_or_create
    return self.get(**lookup), False
  File "/Library/Python/2.6/site-packages/django/db/models/query.py", line 344, in get
    num = len(clone)
  File "/Library/Python/2.6/site-packages/django/db/models/query.py", line 82, in __len__
    self._result_cache = list(self.iterator())
  File "/Library/Python/2.6/site-packages/django/db/models/query.py", line 273, in iterator
    for row in compiler.results_iter():
  File "/Library/Python/2.6/site-packages/django/db/models/sql/compiler.py", line 680, in results_iter
    for rows in self.execute_sql(MULTI):
  File "/Library/Python/2.6/site-packages/django/db/models/sql/compiler.py", line 735, in execute_sql
    cursor.execute(sql, params)
  File "/Library/Python/2.6/site-packages/django/db/backends/util.py", line 34, in execute
    return self.cursor.execute(sql, params)
  File "/Library/Python/2.6/site-packages/django/db/backends/mysql/base.py", line 86, in execute
    return self.cursor.execute(query, args)
  File "/Library/Python/2.6/site-packages/MySQL_python-1.2.3-py2.6-macosx-10.6-universal.egg/MySQLdb/cursors.py", line 174, in execute
    self.errorhandler(self, exc, value)
  File "/Library/Python/2.6/site-packages/MySQL_python-1.2.3-py2.6-macosx-10.6-universal.egg/MySQLdb/connections.py", line 36, in defaulterrorhandler
    raise errorclass, errorvalue
DatabaseError: (1146, "Table 'pvtestmatrix.django_content_type' doesn't exist")
>>> version_list = reversion.get_for_object(tm)
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/Library/Python/2.6/site-packages/reversion/revisions.py", line 527, in get_for_object
    return self.get_for_object_reference(obj.__class__, obj.pk, db)
  File "/Library/Python/2.6/site-packages/reversion/revisions.py", line 506, in get_for_object_reference
    content_type = ContentType.objects.db_manager(db).get_for_model(model)
  File "/Library/Python/2.6/site-packages/django/contrib/contenttypes/models.py", line 38, in get_for_model
    defaults = {'name': smart_unicode(opts.verbose_name_raw)},
  File "/Library/Python/2.6/site-packages/django/db/models/manager.py", line 135, in get_or_create
    return self.get_query_set().get_or_create(**kwargs)
  File "/Library/Python/2.6/site-packages/django/db/models/query.py", line 378, in get_or_create
    return self.get(**lookup), False
  File "/Library/Python/2.6/site-packages/django/db/models/query.py", line 344, in get
    num = len(clone)
  File "/Library/Python/2.6/site-packages/django/db/models/query.py", line 82, in __len__
    self._result_cache = list(self.iterator())
  File "/Library/Python/2.6/site-packages/django/db/models/query.py", line 273, in iterator
    for row in compiler.results_iter():
  File "/Library/Python/2.6/site-packages/django/db/models/sql/compiler.py", line 680, in results_iter
    for rows in self.execute_sql(MULTI):
  File "/Library/Python/2.6/site-packages/django/db/models/sql/compiler.py", line 735, in execute_sql
    cursor.execute(sql, params)
  File "/Library/Python/2.6/site-packages/django/db/backends/util.py", line 34, in execute
    return self.cursor.execute(sql, params)
  File "/Library/Python/2.6/site-packages/django/db/backends/mysql/base.py", line 86, in execute
    return self.cursor.execute(query, args)
  File "/Library/Python/2.6/site-packages/MySQL_python-1.2.3-py2.6-macosx-10.6-universal.egg/MySQLdb/cursors.py", line 174, in execute
    self.errorhandler(self, exc, value)
  File "/Library/Python/2.6/site-packages/MySQL_python-1.2.3-py2.6-macosx-10.6-universal.egg/MySQLdb/connections.py", line 36, in defaulterrorhandler
    raise errorclass, errorvalue
DatabaseError: (1146, "Table 'pvtestmatrix.django_content_type' doesn't exist")

我在这里正确使用回归吗？通过运行“reversion.get_for_object(tm)”，我希望在上一步发出“tm.save()”时看到一个至少包含最后保存版本的列表。

不确定此错误是否特定于反转处理，因为我可以在不使用反转的情况下提交对模型的更改。提前致谢。

4

1 回答 1

3

您的django_content_type表不存在，因为django.contrib.contenttypes在您的INSTALLED_APPS. 取消注释（删除#）并再次运行 syncdb。

于 2013-07-28T22:40:37.557 回答