django1/django/contrib/admin/actions.py

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"""
Built-in, globally-available admin actions.
"""
from django import template
from django.core.exceptions import PermissionDenied
from django.contrib.admin import helpers
from django.contrib.admin.util import get_deleted_objects, model_ngettext
from django.shortcuts import render_to_response
from django.utils.encoding import force_unicode
from django.utils.html import escape
from django.utils.safestring import mark_safe
from django.utils.text import capfirst
from django.utils.translation import ugettext_lazy, ugettext as _
try:
set
except NameError:
from sets import Set as set # Python 2.3 fallback
def delete_selected(modeladmin, request, queryset):
"""
Default action which deletes the selected objects.
This action first displays a confirmation page whichs shows all the
deleteable objects, or, if the user has no permission one of the related
childs (foreignkeys), a "permission denied" message.
Next, it delets all selected objects and redirects back to the change list.
"""
opts = modeladmin.model._meta
app_label = opts.app_label
# Check that the user has delete permission for the actual model
if not modeladmin.has_delete_permission(request):
raise PermissionDenied
# Populate deletable_objects, a data structure of all related objects that
# will also be deleted.
# deletable_objects must be a list if we want to use '|unordered_list' in the template
deletable_objects = []
perms_needed = set()
i = 0
for obj in queryset:
deletable_objects.append([mark_safe(u'%s: <a href="%s/">%s</a>' % (escape(force_unicode(capfirst(opts.verbose_name))), obj.pk, escape(obj))), []])
get_deleted_objects(deletable_objects[i], perms_needed, request.user, obj, opts, 1, modeladmin.admin_site, levels_to_root=2)
i=i+1
# The user has already confirmed the deletion.
# Do the deletion and return a None to display the change list view again.
if request.POST.get('post'):
if perms_needed:
raise PermissionDenied
n = queryset.count()
if n:
for obj in queryset:
obj_display = force_unicode(obj)
modeladmin.log_deletion(request, obj, obj_display)
queryset.delete()
modeladmin.message_user(request, _("Successfully deleted %(count)d %(items)s.") % {
"count": n, "items": model_ngettext(modeladmin.opts, n)
})
# Return None to display the change list page again.
return None
context = {
"title": _("Are you sure?"),
"object_name": force_unicode(opts.verbose_name),
"deletable_objects": deletable_objects,
'queryset': queryset,
"perms_lacking": perms_needed,
"opts": opts,
"root_path": modeladmin.admin_site.root_path,
"app_label": app_label,
'action_checkbox_name': helpers.ACTION_CHECKBOX_NAME,
}
# Display the confirmation page
return render_to_response(modeladmin.delete_confirmation_template or [
"admin/%s/%s/delete_selected_confirmation.html" % (app_label, opts.object_name.lower()),
"admin/%s/delete_selected_confirmation.html" % app_label,
"admin/delete_selected_confirmation.html"
], context, context_instance=template.RequestContext(request))
delete_selected.short_description = ugettext_lazy("Delete selected %(verbose_name_plural)s")