使用来自mercurial python hook的Django模型-Java 学习之路

我正在尝试在更改组挂钩期间在数据库中排队一些构建请求 . 数据库表由Django应用程序管理 . 所以，在钩子中，我想使用Django模型来提交构建请求 . 但是，我无法正确设置导入模型 .

根据这个（https://docs.djangoproject.com/en/1.3/ref/django-admin/）信息，我需要做的就是将我的django站点添加到sys路径，并设置DJANGO_SETTINGS_MODULE . django站点位于/ opt / mysite中，所以 - 从python控制台尝试这个：

>>> import sys
>>> import os
>>> sys.path.append('/opt')
>>> os.environ['DJANGO_SETTINGS_MODULE'] = 'mysite.settings'
>>> from mysite.myapp.models import Build
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/opt/mysite/myapp/models.py", line 1, in <module>
    from django.db import models
  File "/usr/lib/pymodules/python2.7/django/db/__init__.py", line 78, in <module>
    connection = connections[DEFAULT_DB_ALIAS]
  File "/usr/lib/pymodules/python2.7/django/db/utils.py", line 93, in __getitem__
    backend = load_backend(db['ENGINE'])
  File "/usr/lib/pymodules/python2.7/django/db/utils.py", line 33, in load_backend
    return import_module('.base', backend_name)
  File "/usr/lib/pymodules/python2.7/django/utils/importlib.py", line 35, in import_module
    __import__(name)
  File "/usr/lib/pymodules/python2.7/django/db/backends/mysql/base.py", line 28, in <module>
    from django.db import utils
ImportError: cannot import name utils
>>>

Second Attempt:

基于此（http://www.b-list.org/weblog/2007/sep/22/standalone-django-scripts/）我可以使用setup_environ（），当我在python shell中尝试这个时，它可以工作：

>>> import sys
>>> sys.path.append('/opt')
>>> from django.core.management import setup_environ
>>> from mysite import settings
>>> setup_environ(settings)
'/opt/mysite'
>>> from mysite.myapp.models import Build
>>> Build.objects.all()
[<Build: #1 F nkj sdfsdfsdfs43qg test_branch>, <Build: #2 F nkj sdfsdfsdfs43qg test_branch>, <Build: #13 Q   >, <Build: #14 Q   nkj_bug243>, <Build: #11 F nkj 444hwe45hedrrt nkj_bug272>, <Build: #12 F nkj sdfsdfsdfs43qg test_branch>]

但是，当我在Mercurial钩子中尝试这个时，我在尝试导入Build模型时会遇到错误：

#!/usr/bin/env python
import sys
path = '/opt'
if path not in sys.path:
    sys.path.append(path)

from django.core.management import setup_environ
from mysite import settings
setup_environ(settings)

from mysite.myapp.models import Build
import datetime

... do stuff ...

当它到达'from mysite.myapp.models import Build'行时，我得到以下错误输出：

** unknown exception encountered, please report by visiting
**  http://mercurial.selenic.com/wiki/BugTracker
** Python 2.7.2+ (default, Oct  4 2011, 20:06:09) [GCC 4.6.1]
** Mercurial Distributed SCM (version 1.9.1)
** Extensions loaded:
Traceback (most recent call last):
  File "/usr/bin/hg", line 38, in <module>
    mercurial.dispatch.run()
  File "/usr/lib/python2.7/dist-packages/mercurial/dispatch.py", line 27, in run
    sys.exit(dispatch(request(sys.argv[1:])))
  File "/usr/lib/python2.7/dist-packages/mercurial/dispatch.py", line 64, in dispatch
    return _runcatch(req)
  File "/usr/lib/python2.7/dist-packages/mercurial/dispatch.py", line 87, in _runcatch
    return _dispatch(req)
  File "/usr/lib/python2.7/dist-packages/mercurial/dispatch.py", line 679, in _dispatch
    cmdpats, cmdoptions)
  File "/usr/lib/python2.7/dist-packages/mercurial/dispatch.py", line 454, in runcommand
    ret = _runcommand(ui, options, cmd, d)
  File "/usr/lib/python2.7/dist-packages/mercurial/dispatch.py", line 733, in _runcommand
    return checkargs()
  File "/usr/lib/python2.7/dist-packages/mercurial/dispatch.py", line 687, in checkargs
return cmdfunc()
  File "/usr/lib/python2.7/dist-packages/mercurial/dispatch.py", line 676, in <lambda>
    d = lambda: util.checksignature(func)(ui, *args, **cmdoptions)
  File "/usr/lib/python2.7/dist-packages/mercurial/util.py", line 385, in check
return func(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/mercurial/commands.py", line 3884, in push
    newbranch=opts.get('new_branch'))
  File "/usr/lib/python2.7/dist-packages/mercurial/localrepo.py", line 1428, in push
lock=lock)
  File "/usr/lib/python2.7/dist-packages/mercurial/localrepo.py", line 1849, in addchangegroup
source=srctype, url=url)
  File "/usr/lib/python2.7/dist-packages/mercurial/localrepo.py", line 224, in hook
    return hook.hook(self.ui, self, name, throw, **args)
  File "/usr/lib/python2.7/dist-packages/mercurial/hook.py", line 160, in hook
    mod = extensions.loadpath(path, 'hghook.%s' % hname)
  File "/usr/lib/python2.7/dist-packages/mercurial/extensions.py", line 45, in loadpath
    return imp.load_source(module_name, path)
  File "/opt/unapse/belvedere/mercurial_hook.py", line 14, in <module>
    from unapse.belvedere.models import Build
  File "/usr/lib/python2.7/dist-packages/mercurial/demandimport.py", line 109, in _demandimport
    mod = _origimport(name, globals, locals)
  File "/opt/unapse/belvedere/models.py", line 1, in <module>
    from django.db import models
  File "/usr/lib/python2.7/dist-packages/mercurial/demandimport.py", line 109, in _demandimport
    mod = _origimport(name, globals, locals)
  File "/usr/lib/pymodules/python2.7/django/db/__init__.py", line 14, in <module>
    if not settings.DATABASES:
  File "/usr/lib/pymodules/python2.7/django/utils/functional.py", line 276, in __getattr__
    self._setup()
  File "/usr/lib/pymodules/python2.7/django/conf/__init__.py", line 42, in _setup
    self._wrapped = Settings(settings_module)
  File "/usr/lib/pymodules/python2.7/django/conf/__init__.py", line 139, in __init__
    logging_config_func(self.LOGGING)
  File "/usr/lib/python2.7/logging/config.py", line 776, in dictConfig
    dictConfigClass(config).configure()
  File "/usr/lib/python2.7/logging/config.py", line 575, in configure
    '%r: %s' % (name, e))
ValueError: Unable to configure handler 'mail_admins': __import__() argument 1 must be string, not DictConfigurator

关于什么可能导致这个问题的任何想法？

2 回答

1
DictConfigurator错误是python中的一个错误，希望在下一个2.7版本（http://bugs.python.org/issue12718）中修复，某些东西（可能是mercurial）覆盖 import 并且python的日志代码在这种情况下失败 .

在那之前，我就是为了解决这个问题 . 将dictconfig.py从django / utils复制到你的python系统路径中的某个地方（我把它放在我的钩子旁边） . 改变线
```
importer = __import__
```
至：
```
def importer(self, *args):
    return __import(*args)__
```
然后在您的django项目的settings.py中添加到结尾：
```
LOGGING_CONFIG = 'website.dictconfig.dictConfig'
```
将website.dictconfig更新为你将dictconfig文件放入的任何路径，以便python可以找到它 .

UPDATE ：我认为还有一种更简单的方法 . 在导入任何其他内容之前，将其添加到钩子脚本的顶部：
```
from mercurial import demandimport;
demandimport.disable()
```
这使得Mercurial恢复 import 覆盖并且似乎干净地解决了问题 .
回复于 2024-04-30T22:55:22+08:00

如果你需要将它添加到网站包中，我还建议你将django目录放在 sys.path 的前面而不是结尾 .

这是我们用于将Django应用程序集成到其他python应用程序中的代码 .

import os
import sys

# point this at the virtualenv dir that your django deployment runs out of
# you are using virtualenv. right?
DJANGO_ENV = '/home/core/python-envs/production'

# where your code lives (ie where settings.py is)
DJANGO_DIR = '/home/core/code/production'

# add our site packages
import site
site_packages = os.path.join(DJANGO_ENV, 'lib', 'python%s' % sys.version[:3], 'site-packages')
site.addsitedir(site_packages)

# put the main Django directory on first
sys.path.insert(0, DJANGO_DIR)

# setup the Django environment pointing to our settings
import settings
import django.core.management
django.core.management.setup_environ(settings)

# finally, import our objects
from yourapp.models import YourModel

最后要注意的是，当我们将代码导入某些应用程序时，我们遇到了范围问题和进口冲突 . 为了解决这个问题，我们将我们想要在函数中完成的工作包装起来，以便它获得自己的范围 .

例如，而不是：

from yourapp.models import YourModel
objs = YourModel.objects.filter(something=True)
...

做类似的事情：

def do_work():
    from yourapp.models import YourModel
    objs = YourModel.objects.filter(something=True)
    ...
do_work()

回复于 2024-04-30T22:55:22+08:00

使用来自mercurial python hook的Django模型

2 回答

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