freewayz · November 12, 2017 06:43 · Sep 17, 2014
diff --git a/admin.py b/admin.py
@@ -0,0 +1,61 @@
+from functools import update_wrapper
+from django.contrib import admin
+from django.contrib.admin import ModelAdmin
+from django.contrib.admin.templatetags.admin_urls import add_preserved_filters
+from django.core.exceptions import PermissionDenied
+from django.shortcuts import render
+
+from myapp.models import Widget
+from myapp.forms import ManageWidgetForm
+
+
+class WidgetAdmin(ModelAdmin):
+    change_form_template = 'myapp/change_form.html'
+    manage_view_template = 'myapp/manage_view.html'
+
+    def get_urls(self):
+        from django.conf.urls import patterns, url
+
+        def wrap(view):
+            def wrapper(*args, **kwargs):
+                return self.admin_site.admin_view(view)(*args, **kwargs)
+            return update_wrapper(wrapper, view)
+
+        info = self.model._meta.app_label, self.model._meta.model_name
+
+        urls = patterns('',
+            url(r'^(.+)/manage/$',
+                wrap(self.manage_view),
+                name='%s_%s_manage' % info),
+        )
+
+        super_urls = super(WidgetAdmin, self).get_urls()
+
+        return urls + super_urls
+
+    def manage_view(self, request, id, form_url='', extra_context=None):
+        opts = Widget._meta
+        form = ManageWidgetForm()
+        obj = Widget.objects.get(pk=id)
+
+        if not self.has_change_permission(request, obj):
+            raise PermissionDenied
+
+        # do cool management stuff here
+
+        preserved_filters = self.get_preserved_filters(request)
+        form_url = add_preserved_filters({'preserved_filters': preserved_filters, 'opts': opts}, form_url)
+
+        context = {
+            'title': 'Manage %s' % obj,
+            'has_change_permission': self.has_change_permission(request, obj),
+            'form_url': form_url,
+            'opts': opts,
+            'errors': form.errors,
+            'app_label': opts.app_label,
+            'original': obj,
+        }
+        context.update(extra_context or {})
+
+        return render(request, self.manage_view_template, context)
+admin.site.register(Widget, WidgetAdmin)
diff --git a/change_form.html b/change_form.html
@@ -0,0 +1,10 @@
+{% extends "admin/change_form.html" %}
+{% load i18n admin_urls admin_static admin_modify %}
+
+{% block object-tools-items %}
+<li>
+    {% url opts|admin_urlname:'manage' original.pk|admin_urlquote as manage_url %}
+    <a href="{% add_preserved_filters manage_url %}" class="historylink">{% trans "Manage" %}</a>
+</li>
+{% block.super %}
+{% endblock %}
diff --git a/manage_form.html b/manage_form.html
@@ -0,0 +1,23 @@
+{% extends "admin/base_site.html" %}
+{% load i18n admin_urls admin_static admin_modify %}
+{% load humanize tz %}
+
+{% block breadcrumbs %}
+<div class="breadcrumbs">
+<a href="{% url 'admin:index' %}">{% trans 'Home' %}</a>
+&rsaquo; <a href="{% url 'admin:app_list' app_label=opts.app_label %}">{{ app_label|capfirst|escape }}</a>
+&rsaquo; {% if has_change_permission %}<a href="{% url opts|admin_urlname:'changelist' %}">{{ opts.verbose_name_plural|capfirst }}</a>{% else %}{{ opts.verbose_name_plural|capfirst }}{% endif %}
+&rsaquo; {% trans 'Manage' %} {{ original|truncatewords:"18" }}
+</div>
+{% endblock %}
+
+{% block content %}
+{% timezone "America/Los_Angeles" %}
+<div>
+  <form action="{{ form_url }}" method="post">
+    {% csrf_token %}
+    <!-- do cool form things -->
+  </form>
+</div>
+{% endtimezone %}
+{% endblock %}