{"id":292,"date":"2011-11-14T22:46:58","date_gmt":"2011-11-15T02:46:58","guid":{"rendered":"http:\/\/dashdrum.com\/blog\/?p=292"},"modified":"2011-11-15T14:14:39","modified_gmt":"2011-11-15T18:14:39","slug":"class-based-views-deleteview-example","status":"publish","type":"post","link":"https:\/\/dashdrum.com\/blog\/2011\/11\/class-based-views-deleteview-example\/","title":{"rendered":"Class Based Views &#8211; DeleteView Example"},"content":{"rendered":"<p>Another simple one &#8211; this time a <code>DeleteView<\/code> from <code>delete_object<\/code>.<\/p>\n<p>Before:<\/p>\n<pre>@permission_required('b2c.delete_b2ctrack')\r\ndef delete_track(request,id):\r\n    track = get_object_or_404(B2CTrack, pk=id)\r\n    if track.allow_delete:\r\n        return delete_object(request,\r\n                             model=B2CTrack,\r\n                             object_id=id,\r\n                             post_delete_redirect=reverse('track_list'),\r\n                             template_name='track_confirm_delete.html')\r\n    else:\r\n        return HttpResponseRedirect(reverse('track_view', kwargs = {'pk':id} ))<\/pre>\n<p>After:<\/p>\n<pre>class TrackDeleteView(DeleteView):\r\n    template_name = 'track_confirm_delete.html'\r\n    model = B2CTrack\r\n    \r\n    def get_success_url(self):\r\n        return reverse('track_list')\r\n    \r\n    ## Override dispatch to apply the permission decorator\r\n    @method_decorator(permission_required('b2c.delete_b2ctrack'))\r\n    def dispatch(self, request, *args, **kwargs):\r\n        return super(TrackDeleteView, self).dispatch(request, *args, **kwargs)\r\n    \r\n    ## Only return object if the allow_delete property is True\r\n    def get_object(self, *args, **kwargs):\r\n        object = super(TrackDeleteView,self).get_object(*args, **kwargs)\r\n        if object.allow_delete:\r\n            return object\r\n        else:\r\n            raise Http404<\/pre>\n<p>The old code would redirect back to the view for the same object if the <code>allow_delete<\/code> property was false. (allow_delete is a property I use on my models to check for dependent DB entries)  Since one has to monkey with the URL to even attempt a delete of an object that isn&#8217;t allowed, I decided a 404 was more appropriate.  Lesson for the User: Don&#8217;t Monkey with URLs!!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Another simple one &#8211; this time a DeleteView from delete_object. Before: @permission_required(&#8216;b2c.delete_b2ctrack&#8217;) def delete_track(request,id): track = get_object_or_404(B2CTrack, pk=id) if track.allow_delete: return delete_object(request, model=B2CTrack, object_id=id, post_delete_redirect=reverse(&#8216;track_list&#8217;), template_name=&#8217;track_confirm_delete.html&#8217;) else: return HttpResponseRedirect(reverse(&#8216;track_view&#8217;, kwargs = {&#8216;pk&#8217;:id} )) After: class TrackDeleteView(DeleteView): template_name = &#8216;track_confirm_delete.html&#8217; model = B2CTrack def get_success_url(self): return reverse(&#8216;track_list&#8217;) ## Override dispatch to apply the permission decorator @method_decorator(permission_required(&#8216;b2c.delete_b2ctrack&#8217;)) &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/dashdrum.com\/blog\/2011\/11\/class-based-views-deleteview-example\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Class Based Views &#8211; DeleteView Example&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-292","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/dashdrum.com\/blog\/wp-json\/wp\/v2\/posts\/292","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dashdrum.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dashdrum.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dashdrum.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/dashdrum.com\/blog\/wp-json\/wp\/v2\/comments?post=292"}],"version-history":[{"count":6,"href":"https:\/\/dashdrum.com\/blog\/wp-json\/wp\/v2\/posts\/292\/revisions"}],"predecessor-version":[{"id":299,"href":"https:\/\/dashdrum.com\/blog\/wp-json\/wp\/v2\/posts\/292\/revisions\/299"}],"wp:attachment":[{"href":"https:\/\/dashdrum.com\/blog\/wp-json\/wp\/v2\/media?parent=292"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dashdrum.com\/blog\/wp-json\/wp\/v2\/categories?post=292"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dashdrum.com\/blog\/wp-json\/wp\/v2\/tags?post=292"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}