Django, template context processors
I have a weird problem, I want to add a global query using context processors. This is how I did it by following:
made a processor.py in my app as such:
from myproject.myapp.models import Foo
def foos(request):
return {'foos': Foo.objects.all()}
and at the end of my setting.py I have added this:
开发者_运维知识库TEMPLATE_CONTEXT_PROCESSORS = ('myapp.processor.foos',)
Lastly I pass my view as this:
def index_view(request):
return render_to_response('index.html', {}, context_instance=RequestContext(request))
and at my index.html template:
<select id="select_foo">
{% for foo in foos %}
<option value="/{{ foo.slug }}">{{ foo.name }}</option>
{% endfor %}
</select>
And lastly my url:
(r'^$', 'myapp.views.index_view'),
My foos display without any problem, however my media_url and other contexts are gone. What can be the issue
You need to add the default values of TEMPLATE_CONTEXT_PROCESSORS. However, instead of hard-coding those values, which will be tied to a specific version of Django, you can append your context processor to the default values by the following:
from django.conf import global_settings
TEMPLATE_CONTEXT_PROCESSORS = global_settings.TEMPLATE_CONTEXT_PROCESSORS + (
"myapp.processor.foos",
)
Make sure to include the trailing comma in the tuple, so that Python recognizes it as a tuple.
When you specify this:
TEMPLATE_CONTEXT_PROCESSORS = ('myapp.processor.foos',)
In your settings file, you are overriding the Django's default context processors. In order to extend the list, you need to include the default ones in your settings:
TEMPLATE_CONTEXT_PROCESSORS = (
"django.core.context_processors.auth",
"django.core.context_processors.debug",
"django.core.context_processors.i18n",
"django.core.context_processors.media",
"myapp.processor.foos",
)
Note, the settings above are the defaults (plus your processor) for django 1.1.
Here what worked for me for Django 1.3
TEMPLATE_CONTEXT_PROCESSORS = (
"django.contrib.auth.context_processors.auth",
"django.core.context_processors.debug",
"django.core.context_processors.i18n",
"django.core.context_processors.media",
"django.core.context_processors.static",
"django.contrib.messages.context_processors.messages",
"myapp.processor.foos", )
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