在Django中运行时修改urlpatterns

时间:2012-03-29 22:36:22

标签: django url-pattern

我正在开发一个需要加载动态模块的Django应用程序(在运行时)。现在我可以上传(从客户端浏览器到服务器)“插件”并在数据库中注册插件模型等。但我需要一种方法来处理每个插件的urlpatterns。目前我已经在webapp的“核心”中编写了一个函数来注册模型,并且(理论上)通过包含它将上传插件的url模式添加到webapp urls.py中。这个功能是:

def register_plugin_model(model,codename):
# Standard syncdb expects models to be in reliable locations,
# so dynamic models need to bypass django.core.management.syncdb.
# On the plus side, this allows individual models to be installed
# without installing the entire project structure.
# On the other hand, this means that things like relationships and
# indexes will have to be handled manually.
# This installs only the basic table definition.

if model is not None:
    style = color.no_style()
    cursor = connection.cursor()
    tables = connection.introspection.table_names()
    seen_models = connection.introspection.installed_models(tables)
    statements,trsh = connection.creation.sql_create_model(model, style, seen_models)
    for sql in statements:
        cursor.execute(sql)

# add urlpatterns
from django.conf.urls.defaults import patterns, url,include
from project.plugins.urls import urlpatterns
urlpatterns += patterns(url(r'^' + codename + '/' , include ( 'media.plugins.' + codename + '.urls' )))

插件以tgz格式上传到“media / tmp”,然后解压缩到“media / plugins /”,其中是插件的代号,用户上传的插件由“project.plugins”管理。

所有插件逻辑工作正常,但是当我尝试将上传的插件urls.py文件包含到webapp(project.plugins.urls)中时,它不起作用。我打印了“project.plugins.urls.urlpatterns”的值,并且在“urlpatterns + = pat ....”之后没有修改。

有什么办法可以做我需要的吗?

祝你好运

2 个答案:

答案 0 :(得分:3)

您遇到的问题是urlpatterns在项目url.py文件中定义,而urlpatterns文件中定义的register_plugin是不同的变量。它们是模块的本地。想象一下以下场景:

#math.py
pi = 3.14

#some_nasty_module.py
from math import pi
pi = 'for_teh_luls'

#your_module.py
from math import pi
pi * 2
>>> 'for_teh_lulsfor_teh_luls'
# wtf?

你显然不允许这样做。您可能需要做的是,请原始urls.py尝试在您的插件文件夹中发现网址。

# urls.py
urlpatterns += (...)

def load_plugin_urls():
    for module in get_plugin_modules():
        try:
            from module.urls import urlpatterns as u
            urlpatterns += u
        except:
            pass

不幸的是,网络服务器需要回收该代码才能运行的过程,因此插件的上传只有在发生后才会生效。

答案 1 :(得分:2)

修改urls.py和urls.py的函数属于同一个模块。我通过添加“空模式”来解决它:

urlpatterns += patterns('',url(r'^' + codename + '/' , include ( 'media.plugins.' + codename + '.urls' )))

现在,它说:

BEFORE:
<RegexURLPattern plugins ^$>
<RegexURLPattern plugin_new ^new/$>
<RegexURLPattern plugin_profile ^profile/(?P<plugin>\w+)$>
AFTER
<RegexURLPattern plugins ^$>
<RegexURLPattern plugin_new ^new/$>
<RegexURLPattern plugin_profile ^profile/(?P<plugin>\w+)$>
<RegexURLResolver media.plugins.sampleplugin.urls (None:None) ^sampleplugin/>

但是你说过,它不会立即生效:/

我在不删除* .pyc文件的情况下重新启动了应用程序,但更改未生效。有什么问题?

PD:插件urls.py文件包含:

from django.conf.urls.defaults import patterns, url
from .views import index_view

urlpatterns = patterns( '' , url(r'^.*' , index_view ) )

感谢您的回复

祝你好运