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from django.template import loader, RequestContext
from django.http import Http404, HttpResponse
from django.core.xheaders import populate_xheaders
from django.core.paginator import Paginator, InvalidPage
from django.core.exceptions import ObjectDoesNotExist
import warnings
warnings.warn(
'Function-based generic views have been deprecated; use class-based views instead.',
DeprecationWarning
)
def object_list(request, queryset, paginate_by=None, page=None,
allow_empty=True, template_name=None, template_loader=loader,
extra_context=None, context_processors=None, template_object_name='object',
mimetype=None):
"""
Generic list of objects.
Templates: ``<app_label>/<model_name>_list.html``
Context:
object_list
list of objects
is_paginated
are the results paginated?
results_per_page
number of objects per page (if paginated)
has_next
is there a next page?
has_previous
is there a prev page?
page
the current page
next
the next page
previous
the previous page
pages
number of pages, total
hits
number of objects, total
last_on_page
the result number of the last of object in the
object_list (1-indexed)
first_on_page
the result number of the first object in the
object_list (1-indexed)
page_range:
A list of the page numbers (1-indexed).
"""
if extra_context is None: extra_context = {}
queryset = queryset._clone()
if paginate_by:
paginator = Paginator(queryset, paginate_by, allow_empty_first_page=allow_empty)
if not page:
page = request.GET.get('page', 1)
try:
page_number = int(page)
except ValueError:
if page == 'last':
page_number = paginator.num_pages
else:
# Page is not 'last', nor can it be converted to an int.
raise Http404
try:
page_obj = paginator.page(page_number)
except InvalidPage:
raise Http404
c = RequestContext(request, {
'%s_list' % template_object_name: page_obj.object_list,
'paginator': paginator,
'page_obj': page_obj,
'is_paginated': page_obj.has_other_pages(),
# Legacy template context stuff. New templates should use page_obj
# to access this instead.
'results_per_page': paginator.per_page,
'has_next': page_obj.has_next(),
'has_previous': page_obj.has_previous(),
'page': page_obj.number,
'next': page_obj.next_page_number(),
'previous': page_obj.previous_page_number(),
'first_on_page': page_obj.start_index(),
'last_on_page': page_obj.end_index(),
'pages': paginator.num_pages,
'hits': paginator.count,
'page_range': paginator.page_range,
}, context_processors)
else:
c = RequestContext(request, {
'%s_list' % template_object_name: queryset,
'paginator': None,
'page_obj': None,
'is_paginated': False,
}, context_processors)
if not allow_empty and len(queryset) == 0:
raise Http404
for key, value in extra_context.items():
if callable(value):
c[key] = value()
else:
c[key] = value
if not template_name:
model = queryset.model
template_name = "%s/%s_list.html" % (model._meta.app_label, model._meta.object_name.lower())
t = template_loader.get_template(template_name)
return HttpResponse(t.render(c), mimetype=mimetype)
def object_detail(request, queryset, object_id=None, slug=None,
slug_field='slug', template_name=None, template_name_field=None,
template_loader=loader, extra_context=None,
context_processors=None, template_object_name='object',
mimetype=None):
"""
Generic detail of an object.
Templates: ``<app_label>/<model_name>_detail.html``
Context:
object
the object
"""
if extra_context is None: extra_context = {}
model = queryset.model
if object_id:
queryset = queryset.filter(pk=object_id)
elif slug and slug_field:
queryset = queryset.filter(**{slug_field: slug})
else:
raise AttributeError("Generic detail view must be called with either an object_id or a slug/slug_field.")
try:
obj = queryset.get()
except ObjectDoesNotExist:
raise Http404("No %s found matching the query" % (model._meta.verbose_name))
if not template_name:
template_name = "%s/%s_detail.html" % (model._meta.app_label, model._meta.object_name.lower())
if template_name_field:
template_name_list = [getattr(obj, template_name_field), template_name]
t = template_loader.select_template(template_name_list)
else:
t = template_loader.get_template(template_name)
c = RequestContext(request, {
template_object_name: obj,
}, context_processors)
for key, value in extra_context.items():
if callable(value):
c[key] = value()
else:
c[key] = value
response = HttpResponse(t.render(c), mimetype=mimetype)
populate_xheaders(request, response, model, getattr(obj, obj._meta.pk.name))
return response
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