Basic group view and permissions management on the pages

core/admin.py

 from django.contrib import admin
-from .models import User, Page
+from .models import User, Page, Group
 
 
 admin.site.register(User)
+admin.site.register(Group)
 admin.site.register(Page)
 

core/fixtures/groups.json

-[{"pk": 1, "model": "auth.group", "fields": {"name": "root", "permissions": [1, 2, 3, 7, 8, 9, 4, 5, 6, 10, 11, 12, 19, 20, 21, 16, 17, 18, 13, 14, 15]}}]
\ No newline at end of file
+[{"fields": {"permissions": [1, 2, 3, 7, 8, 9, 4, 5, 6, 10, 11, 12, 19, 20, 21, 22, 25, 23, 24, 16, 17, 18, 13, 14, 15]}, "pk": 1, "model": "core.group"}]
\ No newline at end of file

core/migrations/0007_auto_20151126_1613.py

+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('auth', '0006_require_contenttypes_0002'),
+        ('core', '0006_auto_20151125_0855'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Group',
+            fields=[
+                ('group_ptr', models.OneToOneField(auto_created=True, to='auth.Group', primary_key=True, serialize=False, parent_link=True)),
+            ],
+            bases=('auth.group',),
+        ),
+        migrations.AlterField(
+            model_name='page',
+            name='edit_group',
+            field=models.ForeignKey(default=1, to='core.Group', related_name='editable_pages'),
+        ),
+        migrations.AlterField(
+            model_name='page',
+            name='owner_group',
+            field=models.ForeignKey(default=1, to='core.Group', related_name='owned_pages'),
+        ),
+        migrations.AlterField(
+            model_name='page',
+            name='view_group',
+            field=models.ForeignKey(default=1, to='core.Group', related_name='viewable_pages'),
+        ),
+    ]

core/models.py

 from django.db import models
-from django.contrib.auth.models import AbstractBaseUser, PermissionsMixin, UserManager, Group
+from django.contrib.auth.models import AbstractBaseUser, PermissionsMixin, UserManager, Group as AuthGroup
 from django.utils.translation import ugettext_lazy as _
 from django.utils import timezone
 from django.core import validators
@@ -125,6 +125,12 @@ class User(AbstractBaseUser, PermissionsMixin):
         self.username = user_name
         return user_name
 
+class Group(AuthGroup):
+    def get_absolute_url(self):
+        """
+        This is needed for black magic powered UpdateView's children
+        """
+        return reverse('core:group_edit', kwargs={'group_id': self.pk})
 
 class Page(models.Model):
     """
@@ -227,3 +233,4 @@ class Page(models.Model):
     def get_display_name(self):
         return self.get_full_name()
 
+

core/templates/core/group_edit.html

+{% extends "core/base.html" %}
+
+{% block content %}
+<p><a href="{% url 'core:group_list' %}">Back to list</a></p>
+    <h2>Edit group</h2>
+    <form action="" method="post">
+        {% csrf_token %}
+        {{ form.as_p }}
+        <p><input type="submit" value="Update" /></p>
+    </form>
+{% endblock %}
+
+
+
+
+

core/templates/core/group_list.html

+{% extends "core/base.html" %}
+
+{% block title %}
+Group list
+{% endblock %}
+
+{% block content %}
+<h3>Group list</h3>
+<ul>
+{% for g in group_list %}
+<li><a href="{% url 'core:group_edit' g.id %}">{{ g.name }}</a></li>
+{% endfor %}
+</ul>
+{% endblock %}
+

core/urls.py

@@ -17,6 +17,9 @@ urlpatterns = [
     url(r'^reset/done/$', password_reset_complete, name='password_reset_complete'),
     url(r'^register$', register, name='register'),
 
+    url(r'^group/$', GroupListView.as_view(), name='group_list'),
+    url(r'^group/(?P<group_id>[0-9]+)/$', GroupEditView.as_view(), name='group_edit'),
+
     url(r'^user/$', UserListView.as_view(), name='user_list'),
     url(r'^user/(?P<user_id>[0-9]+)/$', UserView.as_view(), name='user_profile'),
     url(r'^user/(?P<user_id>[0-9]+)/edit$', UserUpdateProfileView.as_view(), name='user_edit'),

core/views/__init__.py

 from .user import *
 from .page import *
 from .site import *
+from .group import *

core/views/forms.py

@@ -4,7 +4,7 @@ from django.contrib.auth import logout, login, authenticate
 from django.forms import CheckboxSelectMultiple
 import logging
 
-from core.models import User, Page
+from core.models import User, Page, Group
 
 class RegisteringForm(UserCreationForm):
     error_css_class = 'error'
@@ -33,3 +33,13 @@ class UserGroupsForm(forms.ModelForm):
             'user_permissions': CheckboxSelectMultiple,
         }
 
+class GroupEditForm(forms.ModelForm):
+    error_css_class = 'error'
+    required_css_class = 'required'
+    class Meta:
+        model = Group
+        fields = ['name', 'permissions',]
+        widgets = {
+            'permissions': CheckboxSelectMultiple,
+        }
+

core/views/group.py

+from django.views.generic.edit import UpdateView
+from django.views.generic import ListView
+
+from core.models import Group
+from core.views.forms import GroupEditForm
+
+class GroupListView(ListView):
+    """
+    Displays the group list
+    """
+    model = Group
+    template_name = "core/group_list.html"
+
+class GroupEditView(UpdateView):
+    model = Group
+    pk_url_kwarg = "group_id"
+    template_name = "core/group_edit.html"
+    form_class = GroupEditForm
+

core/views/page.py

@@ -2,6 +2,8 @@
 from django.shortcuts import render, redirect, get_object_or_404
 from django.views.generic import ListView, DetailView
 from django.views.generic.edit import UpdateView
+from django.contrib.auth.decorators import login_required, permission_required
+from django.utils.decorators import method_decorator
 
 from core.models import Page
 
@@ -15,6 +17,10 @@ class PageListView(ListView):
 class PageView(DetailView):
     model = Page
 
+    @method_decorator(permission_required('core.can_view'))
+    def dispatch(self, *args, **kwargs):
+        return super(PageView, self).dispatch(*args, **kwargs)
+
     def get_object(self):
         self.page = Page.get_page_by_full_name(self.kwargs['page_name'])
         return self.page