Sure, I'll go through the list of url tickets on Trac. The key difference with #11642 is "default". What I propose is that urls.py specifies the app_name, period. The only reason to change app_name is conflicting app names, and there are easy workarounds that I feel shouldn't be part of the API itself. The namespace would be specified in include(), and default to the app_name.
Op donderdag 28 mei 2015 15:37:20 UTC+2 schreef Tim Graham: > > Point 1 sounds like https://code.djangoproject.com/ticket/11642 -- and > that ticket says it may be superseded by > https://code.djangoproject.com/ticket/21927. Could you review those > tickets as well as the others in the "Core (URLs)" component of Trac? It > would be good if you could assign yourself any tickets that your project > will address. > > On Wednesday, May 27, 2015 at 5:58:00 PM UTC-4, Marten Kenbeek wrote: >> >> Hi all, >> >> URL namespaces have a few quirks that make them a bit difficult to use >> and understand. I hope to create a patch that clears up these issues. >> >> First up: the distinction between an application namespace and an >> instance namespace. The docs say on the application namespace: >> >> This describes the name of the application that is being deployed. Every >>> instance of a single application will have the same application namespace. >> >> >> And on the instance namespace: >> >> This identifies a specific instance of an application. Instance >>> namespaces should be unique across your entire project. However, an >>> instance namespace can be the same as the application namespace. This is >>> used to specify a default instance of an application. >> >> >> The current implementation requires that both are specified in the same >> place: either in the included url configuration by returning a 3-tuple, or >> in the including url configuration through the arguments to include(). The >> first case generally does not allow multiple deployments of the same app, >> unless the included url configuration contains specific logic to return >> different instance namespaces. The second case does not in any way enforce >> that multiple deployments in fact have the same application namespace. >> >> I'd like to get the semantics and the implementation in line, and provide >> one obvious way to specify namespaces. Including a set of url patterns >> under a namespace involves two parts: the including urlconf that calls >> include(), and the included urlconf that is imported by include(). The >> first is a specific deployment of the imported urlconf; the second is a >> single app. >> >> The obvious way as I see it would be to specify the application namespace >> in the app, and specify the instance namespace as a parameter to include(). >> This enforces the single application namespace for a single set of >> patterns, and allows any end-user to specify the instance namespace on a >> per-instance basis. To take the admin as an example: >> >> admin.site.urls would return a 2-tuple: (patterns, 'admin'), where >> 'admin' is the application namespace. (An alternative to a 2-tuple could be >> an object with urlpatterns and app_name attributes.) >> To include the admin instance, use include(admin.site.urls, >> namespace='admin'). This is the instance namespace. If left out, it could >> default to be the same as the app name. >> >> After a deprecation period, it would be an error to specify an instance >> namespace if there is no application namespace. This is to ensure that the >> app can always reverse its own urls using <app_name>:<view_name> if it >> specifies an application namespace, and using <view_name> if it doesn't. >> (Setting and app_name would technically still be possible by passing a >> hardcoded (patterns, app_name) tuple, just not as an advertised feature.) >> >> The second point is about nested namespace handling and current_app. >> >> At the moment, current_app is looking for an exact namespace match. >> Unlike the namespaced view path, it is not split into namespace parts using >> current_app.split(':'). Take the following (fictional) urlpatterns: >> >> blog_patterns = [ >> url(r'^comments-one/', include('comments.urls', 'comments-one', >> 'comments')), >> url(r'^comments-two/', include('comments.urls', 'comments-two', >> 'comments')), >> ] >> >> urlpatterns = [ >> url(r'^blog-one/', include(blog_patterns, 'blog-one', 'blog')), >> url(r'^blog-two/', include(blog_patterns, 'blog-two', 'blog')), >> ] >> >> Because of how current_app is handled, it is now impossible to reverse >> patterns in 'blog-one:comments-one:' using current_app. To select >> 'blog-one', the current app needs to be the string 'blog-one', but to >> select 'comments-one', it needs to be 'comments-one'. The only solution is >> to hardcode at least one of the instance namespaces in the namespaced view >> path. This also means that setting request.current_app to >> request.resolver_match.namespace, as recommended in the docs, does not work >> if you have nested namespaces. >> >> The ResolverMatch object also has some inconsistent behaviour for >> app_name. resolver_match.namespace is the full namespace path, i.e. >> 'blog-one:comments-one' (with resolver_match.namespaces a list of >> individual namespaces, i.e. ['blog-one', 'comments-one']), but >> resolver_match.app_name is the outer-most app_name, in this case >> 'blog-one', with no trace whatsoever of the full app_name path. >> >> To illustrate how I would see it end up eventually (after the deprecation >> cycle), I've created a branch at >> https://github.com/knbk/django/tree/namespaces. I feel these changes are >> fairly straightforward, but any comments are appreciated. >> >> Marten >> > -- You received this message because you are subscribed to the Google Groups "Django developers (Contributions to Django itself)" group. 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