在 Django 中从 urls.py 输出文本

Question

Is there any way I can simply output text (not HTML) from urls.py instead of calling a function (in views.py or otherwise)?

urlpatterns = patterns('',
    url(r'^$', "Hello World"),
)

Answer 1

No, definitly. A url must map a pattern to a callable, and this callable must accept a HttpRequest as first argument and return a HttpResponse .

The closer thing you could do would be to map the pattern to a lambda (anonymous function), ie:

from django.http import HttpResponse

urlpatterns = patterns('',
    url(r'^$', lambda request: HttpResponse("Hello World", content_type="text/plain")),
)

but I would definitly not consider this as good practice.

Answer 2

The url function takes a callable, so something like

rlpatterns = patterns('',
    url(r'^$', lambda req:HttpResponse("Hello World")),
)

would work. There is really nothing gained in doing so though, except making your urls.py harder to read.

First, you should consider whether you really want this. If there is a need for it (I have never had a need to do this, and I've written a fair share of Django apps during the years), you could wrap this into something more compact, eg

Note that passing a string directly to url treats it as a method name.

def static_text(s):
    return lambda req:HttpResponse(s)

rlpatterns = patterns('',
    url(r'^$', static_text("Hello World")),
)

Answer 3

对于 Django 2.2 及更高版本

path('', lambda request: HttpResponse("Hello World", content_type="text/plain"), name='home'),