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from django import models
from django.core import template_loader
from django.utils.httpwrappers import HttpResponse
from django.core.xheaders import populate_xheaders
from django.core.extensions import DjangoContext as Context
from django.core.paginator import ObjectPaginator, InvalidPage
from django.core.exceptions import Http404, ObjectDoesNotExist
def object_list(request, app_label, module_name, paginate_by=None, allow_empty=False,
template_name=None, template_loader=template_loader,
extra_lookup_kwargs={}, extra_context={}):
"""
Generic list of objects.
Templates: ``<app_label>/<module_name>_list``
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
"""
mod = models.get_module(app_label, module_name)
lookup_kwargs = extra_lookup_kwargs.copy()
if paginate_by:
paginator = ObjectPaginator(mod, lookup_kwargs, paginate_by)
page = request.GET.get('page', 0)
try:
object_list = paginator.get_page(page)
except InvalidPage:
if page == 0 and allow_empty:
object_list = []
else:
raise Http404
page = int(page)
c = Context(request, {
'object_list': object_list,
'is_paginated': True,
'results_per_page': paginate_by,
'has_next': paginator.has_next_page(page),
'has_previous': paginator.has_previous_page(page),
'page': page + 1,
'next': page + 1,
'previous': page - 1,
'pages': paginator.pages,
'hits' : paginator.hits,
})
else:
object_list = mod.get_list(**lookup_kwargs)
c = Context(request, {
'object_list': object_list,
'is_paginated': False
})
if len(object_list) == 0 and not allow_empty:
raise Http404
for key, value in extra_context.items():
if callable(value):
c[key] = value()
else:
c[key] = value
if not template_name:
template_name = "%s/%s_list" % (app_label, module_name)
t = template_loader.get_template(template_name)
return HttpResponse(t.render(c))
def object_detail(request, app_label, module_name, object_id=None, slug=None,
slug_field=None, template_name=None, template_name_field=None,
template_loader=template_loader, extra_lookup_kwargs={},
extra_context={}):
"""
Generic list of objects.
Templates: ``<app_label>/<module_name>_detail``
Context:
object
the object
"""
mod = models.get_module(app_label, module_name)
lookup_kwargs = {}
if object_id:
lookup_kwargs['pk'] = object_id
elif slug and slug_field:
lookup_kwargs['%s__exact' % slug_field] = slug
else:
raise AttributeError("Generic detail view must be called with either an object_id or a slug/slug_field")
lookup_kwargs.update(extra_lookup_kwargs)
try:
object = mod.get_object(**lookup_kwargs)
except ObjectDoesNotExist:
raise Http404("%s.%s does not exist for %s" % (app_label, module_name, lookup_kwargs))
if not template_name:
template_name = "%s/%s_detail" % (app_label, module_name)
if template_name_field:
template_name_list = [getattr(object, template_name_field), template_name]
t = template_loader.select_template(template_name_list)
else:
t = template_loader.get_template(template_name)
c = Context(request, {
'object': object,
})
for key, value in extra_context.items():
if callable(value):
c[key] = value()
else:
c[key] = value
response = HttpResponse(t.render(c))
populate_xheaders(request, response, app_label, module_name, getattr(object, object._meta.pk.name))
return response
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