我正在使用py2exe和amp;的Django实现. Qt的.有一个使用South管理的SQLite数据库.
使用内存数据库在源上运行django测试很好,但我也尝试使用PhantomCSS(PhantomJS)执行测试以执行CSS回归测试.
为此,我有一个LiveServerTestCase(source)的子类.我正在使用磁盘上的sqlite数据库运行Django测试,在启动自定义服务器进程时通过调用loaddata来加载fixture(请参阅最后的服务器函数).
它的测试看起来像这样;
class PhantomTestBackupRestore(PhantomTestCase):
fixtures = ['basic_db.json',]
def test_backup(self):
self.assertTrue(
self.phantom(RUNNER_PATH,
screenID='lupyvAQL',
host='http://127.0.0.1',
port=buildconstants.PRODUCT_LISTENPORT)
)
我用以下命令创建的07001(这昨天加载所以似乎是loaddata的一个气质问题);
manage.py dumpdata -n --indent 4 --exclude=contenttypes --exclude=auth --format=json > phantom/fixtures/basic_db.json
我得到以下stacktrace;
[exec] Traceback (most recent call last):
[exec] File "C:\Python27\lib\multiprocessing\process.py", line 258, in _bootstrap
[exec] self.run()
[exec] File "C:\Python27\lib\multiprocessing\process.py", line 114, in run
[exec] self._target(*self._args, **self._kwargs)
[exec] File "C:\Users\markw\work\bptrti3b\src\django_offline\startuphelpers.py", line 124, in django_server_helper
[exec] *fixture_list
[exec] File "C:\Users\markw\work\bptrti3b\src\django\core\management\base.py", line 283, in execute
[exec] output = self.handle(*args, **options)
[exec] File "C:\Users\markw\work\bptrti3b\src\django\core\management\commands\loaddata.py", line 55, in handle
[exec] self.loaddata(fixture_labels)
[exec] File "C:\Users\markw\work\bptrti3b\src\django\core\management\commands\loaddata.py", line 84, in loaddata
[exec] self.load_label(fixture_label)
[exec] File "C:\Users\markw\work\bptrti3b\src\django\core\management\commands\loaddata.py", line 140, in load_label
[exec] obj.save(using=self.using)
[exec] File "C:\Users\markw\work\bptrti3b\src\django\core\serializers\base.py", line 164, in save
[exec] models.Model.save_base(self.object, using=using, raw=True)
[exec] File "C:\Users\markw\work\bptrti3b\src\django\db\models\base.py", line 578, in save_base
[exec] updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
[exec] File "C:\Users\markw\work\bptrti3b\src\django\db\models\base.py", line 638, in _save_table
[exec] updated = self._do_update(base_qs, using, pk_val, values, update_fields)
[exec] File "C:\Users\markw\work\bptrti3b\src\django\db\models\base.py", line 676, in _do_update
[exec] return base_qs.filter(pk=pk_val)._update(values) > 0
[exec] File "C:\Users\markw\work\bptrti3b\src\django\db\models\query.py", line 509, in _update
[exec] return query.get_compiler(self.db).execute_sql(None)
[exec] File "C:\Users\markw\work\bptrti3b\src\django\db\models\sql\compiler.py", line 971, in execute_sql
[exec] cursor = super(SQLUpdateCompiler, self).execute_sql(result_type)
[exec] File "C:\Users\markw\work\bptrti3b\src\django\db\models\sql\compiler.py", line 777, in execute_sql
[exec] cursor.execute(sql, params)
[exec] File "C:\Users\markw\work\bptrti3b\src\django\db\utils.py", line 105, in inner
[exec] return func(*args, **kwargs)
[exec] File "C:\Users\markw\work\bptrti3b\src\django\db\utils.py", line 99, in __exit__
[exec] six.reraise(dj_exc_type, dj_exc_value, traceback)
[exec] File "C:\Users\markw\work\bptrti3b\src\django\db\utils.py", line 105, in inner
[exec] return func(*args, **kwargs)
[exec] File "C:\Users\markw\work\bptrti3b\src\django\db\backends\sqlite3\base.py", line 445, in execute
[exec] return Database.Cursor.execute(self, query, params)
[exec] OperationalError: Problem installing fixture 'C:\Users\markw\work\src\phantom\fixtures\basic_db.json':
Could not load sites.Site(pk=1): no such table: django_site
因为我正在处理多处理,我不确定manage.py是否可能在发生这些错误时使用内存数据库或其他东西,但是使用以下数据库设置我不认为它使用内存进行测试;
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': os.path.join(
APPDATA_DIR, 'sqlite3.db',
),
'TEST_NAME': os.path.join(
APPDATA_DIR, 'test.db',
)
}
}
如果它有用,启动服务器的功能;
def django_server_helper(qt_pipe=None, fixture_list=None):
"""
This is for use in testing-only modes (e.g. PhantomCSS).
If this process is a subprocess of the main application, qt_pipe will be
supplied to allow us to access functionality provided by django_offline.
The other end of this pipe comes out in the DjangoOfflineApp instance.
@type qt_pipe: multiprocessing.Connection
@param qt_pipe: Pipe for communicating with the main django_offline app.
@type fixture_list: list or None
@param fixture_list: List of JSON fixture files to load in for testing.
@rtype: None
"""
use_threading = True
if fixture_list is not None:
# A fixture list has been supplied, so we're in test mode.
from django.core.management.commands import loaddata
loaddata.Command().execute(
verbosity = 0,
database = "default",
settings = "mysite.settings",
*fixture_list
)
if qt_pipe is not None:
# A pipe has been supplied, so we're a subprocess
from django_offline import connector
connector.QT_PIPE = qt_pipe
# start the django server up
from django_offline import settings_central
try:
from django.contrib.staticfiles.management.commands import runserver
runserver.Command().execute(
use_threading=use_threading,
use_static_handler=True,
insecure_serving=True,
addrport='127.0.0.1:{0}'.format(settings_central.LISTEN_PORT),
)
except socket.error as e:
logging.exception("Socket occupied; not starting a server.")
sys.exit(1)
sys.exit(0)
我是否需要在运行loaddata之前调用syncdb,或者这可以通过使用fixture列表向South调用来完成？
解决方法:
问题是代码在设置数据库表之前运行loaddata,因此无法写入Site值.
通常manage.py测试负责设置测试数据库 – 您是否使用不同的/自定义测试运行器运行？如果没有,那么尝试单步执行manage.py测试,看看测试代码的初始化顺序与syncdb的调用顺序是什么.
如果您使用自己的测试运行器,则向syncdb添加适当的调用.如果使用South,请确保选择South版本,和/或设置SOUTH_TESTS_MIGRATE = False
