Initialised empty app julian.

[philo.git] / contrib / waldo / models.py

diff --git a/contrib/waldo/models.py b/contrib/waldo/models.py
index 4f0cd8c..e3dd079 100644 (file)
--- a/contrib/waldo/models.py
+++ b/contrib/waldo/models.py
@@ -6,17 +6,17 @@ from django.contrib.auth.forms import PasswordResetForm, SetPasswordForm, Passwo
 from django.contrib.auth.models import User
 from django.contrib.auth.tokens import default_token_generator as password_token_generator
 from django.contrib.sites.models import Site
 from django.contrib.auth.models import User
 from django.contrib.auth.tokens import default_token_generator as password_token_generator
 from django.contrib.sites.models import Site

-from django.core.mail import send_mail
-from django.core.urlresolvers import reverse
+from django.core.mail import EmailMultiAlternatives, send_mail

 from django.db import models
 from django.http import Http404, HttpResponseRedirect
 from django.shortcuts import render_to_response, get_object_or_404
 from django.db import models
 from django.http import Http404, HttpResponseRedirect
 from django.shortcuts import render_to_response, get_object_or_404

+from django.template.defaultfilters import striptags

 from django.utils.http import int_to_base36, base36_to_int
 from django.utils.translation import ugettext_lazy, ugettext as _
 from django.views.decorators.cache import never_cache
 from django.views.decorators.csrf import csrf_protect
 from philo.models import MultiView, Page
 from django.utils.http import int_to_base36, base36_to_int
 from django.utils.translation import ugettext_lazy, ugettext as _
 from django.views.decorators.cache import never_cache
 from django.views.decorators.csrf import csrf_protect
 from philo.models import MultiView, Page

-from philo.contrib.waldo.forms import LOGIN_FORM_KEY, LoginForm, RegistrationForm
+from philo.contrib.waldo.forms import LOGIN_FORM_KEY, LoginForm, RegistrationForm, UserAccountForm

 from philo.contrib.waldo.tokens import registration_token_generator, email_token_generator
 import urlparse
 
 from philo.contrib.waldo.tokens import registration_token_generator, email_token_generator
 import urlparse
 


@@ -24,13 +24,6 @@ import urlparse
 ERROR_MESSAGE = ugettext_lazy("Please enter a correct username and password. Note that both fields are case-sensitive.")
 
 
 ERROR_MESSAGE = ugettext_lazy("Please enter a correct username and password. Note that both fields are case-sensitive.")
 
 

-def get_field_data(obj, fields):
-       if fields == None:
-               fields = [field.name for field in obj._meta.fields if field.editable]
-       
-       return dict([(field.name, field.value_from_object(obj)) for field in obj._meta.fields if field.name in fields])
-
-

 class LoginMultiView(MultiView):
        """
        Handles login, registration, and forgotten passwords. In other words, this
 class LoginMultiView(MultiView):
        """
        Handles login, registration, and forgotten passwords. In other words, this


@@ -65,12 +58,21 @@ class LoginMultiView(MultiView):
                
                return urlpatterns
        
                
                return urlpatterns
        

-       def get_context(self, extra_dict=None):
-               context = {}
-               context.update(extra_dict or {})
-               return context
+       def make_confirmation_link(self, confirmation_view, token_generator, user, node, token_args=None, reverse_kwargs=None):
+               current_site = Site.objects.get_current()
+               token = token_generator.make_token(user, *(token_args or []))
+               kwargs = {
+                       'uidb36': int_to_base36(user.id),
+                       'token': token
+               }
+               kwargs.update(reverse_kwargs or {})
+               return 'http://%s%s' % (current_site.domain, self.reverse(confirmation_view, kwargs=kwargs, node=node))
+               
+       def get_context(self):
+               """Hook for providing instance-specific context - such as the value of a Field - to all views."""
+               return {}

        
        

-       def display_login_page(self, request, message, node=None, extra_context=None):
+       def display_login_page(self, request, message, extra_context=None):

                request.session.set_test_cookie()
                
                referrer = request.META.get('HTTP_REFERER', None)
                request.session.set_test_cookie()
                
                referrer = request.META.get('HTTP_REFERER', None)


@@ -81,10 +83,10 @@ class LoginMultiView(MultiView):
                        if host != request.get_host():
                                referrer = None
                        else:
                        if host != request.get_host():
                                referrer = None
                        else:

-                               redirect = ''.join(referrer[2:])
+                               redirect = '%s?%s' % (referrer[2], referrer[4])

                
                if referrer is None:
                
                if referrer is None:

-                       redirect = node.get_absolute_url()
+                       redirect = request.node.get_absolute_url()

                
                path = request.get_full_path()
                if redirect != path:
                
                path = request.get_full_path()
                if redirect != path:


@@ -96,18 +98,23 @@ class LoginMultiView(MultiView):
                        form = LoginForm(request.POST)
                else:
                        form = LoginForm()
                        form = LoginForm(request.POST)
                else:
                        form = LoginForm()

-               context = self.get_context({
+               context = self.get_context()
+               context.update(extra_context or {})
+               context.update({

                        'message': message,
                        'form': form
                })
                        'message': message,
                        'form': form
                })

-               context.update(extra_context or {})
-               return self.login_page.render_to_response(node, request, extra_context=context)
+               return self.login_page.render_to_response(request, extra_context=context)

        
        

-       def login(self, request, node=None, extra_context=None):
+       def login(self, request, extra_context=None):

                """
                Displays the login form for the given HttpRequest.
                """
                """
                Displays the login form for the given HttpRequest.
                """

-               context = self.get_context(extra_context)
+               if request.user.is_authenticated():
+                       return HttpResponseRedirect(request.node.get_absolute_url())
+               
+               context = self.get_context()
+               context.update(extra_context or {})

                
                from django.contrib.auth.models import User
                
                
                from django.contrib.auth.models import User
                


@@ -117,12 +124,12 @@ class LoginMultiView(MultiView):
                                message = _("Please log in again, because your session has expired.")
                        else:
                                message = ""
                                message = _("Please log in again, because your session has expired.")
                        else:
                                message = ""

-                       return self.display_login_page(request, message, node, context)
+                       return self.display_login_page(request, message, context)

 
                # Check that the user accepts cookies.
                if not request.session.test_cookie_worked():
                        message = _("Looks like your browser isn't configured to accept cookies. Please enable cookies, reload this page, and try again.")
 
                # Check that the user accepts cookies.
                if not request.session.test_cookie_worked():
                        message = _("Looks like your browser isn't configured to accept cookies. Please enable cookies, reload this page, and try again.")

-                       return self.display_login_page(request, message, node, context)
+                       return self.display_login_page(request, message, context)

                else:
                        request.session.delete_test_cookie()
                
                else:
                        request.session.delete_test_cookie()
                


@@ -144,7 +151,7 @@ class LoginMultiView(MultiView):
                                                                        " Try '%s' instead.") % user.username
                                        else:
                                                message = _("Usernames cannot contain the '@' character.")
                                                                        " Try '%s' instead.") % user.username
                                        else:
                                                message = _("Usernames cannot contain the '@' character.")

-                       return self.display_login_page(request, message, node, context)
+                       return self.display_login_page(request, message, context)

 
                # The user data is correct; log in the user in and continue.
                else:
 
                # The user data is correct; log in the user in and continue.
                else:


@@ -153,39 +160,45 @@ class LoginMultiView(MultiView):
                                try:
                                        redirect = request.session.pop('redirect')
                                except KeyError:
                                try:
                                        redirect = request.session.pop('redirect')
                                except KeyError:

-                                       redirect = node.get_absolute_url()
+                                       redirect = request.node.get_absolute_url()

                                return HttpResponseRedirect(redirect)
                        else:
                                return HttpResponseRedirect(redirect)
                        else:

-                               return self.display_login_page(request, ERROR_MESSAGE, node, context)
+                               return self.display_login_page(request, ERROR_MESSAGE, context)

        login = never_cache(login)
        
        def logout(self, request):
        login = never_cache(login)
        
        def logout(self, request):

-               return auth_views.logout(request, request.META['HTTP_REFERER'])
+               return auth_views.logout(request, request.META.get('HTTP_REFERER', request.node.get_absolute_url()))

        
        def login_required(self, view):
        
        def login_required(self, view):

-               def inner(request, node=None, *args, **kwargs):
+               def inner(request, *args, **kwargs):

                        if not request.user.is_authenticated():
                        if not request.user.is_authenticated():

-                               login_url = reverse('login', urlconf=self).strip('/')
-                               return HttpResponseRedirect('%s%s/' % (node.get_absolute_url(), login_url))
-                       return view(request, node=node, *args, **kwargs)
+                               return HttpResponseRedirect(self.reverse('login', node=request.node))
+                       return view(request, *args, **kwargs)

                
                return inner
        
        def send_confirmation_email(self, subject, email, page, extra_context):
                
                return inner
        
        def send_confirmation_email(self, subject, email, page, extra_context):

-               message = page.render_to_string(extra_context=extra_context)
+               text_content = page.render_to_string(extra_context=extra_context)

                from_email = 'noreply@%s' % Site.objects.get_current().domain
                from_email = 'noreply@%s' % Site.objects.get_current().domain

-               send_mail(subject, message, from_email, [email])
+               
+               if page.template.mimetype == 'text/html':
+                       msg = EmailMultiAlternatives(subject, striptags(text_content), from_email, [email])
+                       msg.attach_alternative(text_content, 'text/html')
+                       msg.send()
+               else:
+                       send_mail(subject, text_content, from_email, [email])

        
        

-       def password_reset(self, request, node=None, extra_context=None, token_generator=password_token_generator):
+       def password_reset(self, request, extra_context=None, token_generator=password_token_generator):
+               if request.user.is_authenticated():
+                       return HttpResponseRedirect(request.node.get_absolute_url())
+               

                if request.method == 'POST':
                        form = PasswordResetForm(request.POST)
                        if form.is_valid():
                if request.method == 'POST':
                        form = PasswordResetForm(request.POST)
                        if form.is_valid():

+                               current_site = Site.objects.get_current()

                                for user in form.users_cache:
                                for user in form.users_cache:

-                                       current_site = Site.objects.get_current()
-                                       token = token_generator.make_token(user)
-                                       link = 'http://%s/%s/%s/' % (current_site.domain, node.get_absolute_url().strip('/'), reverse('password_reset_confirm', urlconf=self, kwargs={'uidb36': int_to_base36(user.id), 'token': token}).strip('/'))

                                        context = {
                                        context = {

-                                               'link': link,
+                                               'link': self.make_confirmation_link('password_reset_confirm', token_generator, user, request.node),

                                                'username': user.username
                                        }
                                        self.send_confirmation_email('Confirm password reset for account at %s' % current_site.domain, user.email, self.password_reset_confirmation_email, context)
                                                'username': user.username
                                        }
                                        self.send_confirmation_email('Confirm password reset for account at %s' % current_site.domain, user.email, self.password_reset_confirmation_email, context)


@@ -194,11 +207,14 @@ class LoginMultiView(MultiView):
                else:
                        form = PasswordResetForm()
                
                else:
                        form = PasswordResetForm()
                

-               context = self.get_context({'form': form})
+               context = self.get_context()

                context.update(extra_context or {})
                context.update(extra_context or {})

-               return self.password_reset_page.render_to_response(node, request, extra_context=context)
+               context.update({
+                       'form': form
+               })
+               return self.password_reset_page.render_to_response(request, extra_context=context)

        
        

-       def password_reset_confirm(self, request, node=None, extra_context=None, uidb36=None, token=None, token_generator=password_token_generator):
+       def password_reset_confirm(self, request, extra_context=None, uidb36=None, token=None, token_generator=password_token_generator):

                """
                Checks that a given hash in a password reset link is valid. If so,
                displays the password set form.
                """
                Checks that a given hash in a password reset link is valid. If so,
                displays the password set form.


@@ -218,16 +234,20 @@ class LoginMultiView(MultiView):
                                if form.is_valid():
                                        form.save()
                                        messages.add_message(request, messages.SUCCESS, "Password reset successful.")
                                if form.is_valid():
                                        form.save()
                                        messages.add_message(request, messages.SUCCESS, "Password reset successful.")

-                                       return HttpResponseRedirect('/%s/%s/' % (node.get_absolute_url().strip('/'), reverse('login', urlconf=self).strip('/')))
+                                       return HttpResponseRedirect(self.reverse('login', node=request.node))

                        else:
                                form = SetPasswordForm(user)
                        
                        else:
                                form = SetPasswordForm(user)
                        

-                       context = self.get_context({'form': form})
-                       return self.password_set_page.render_to_response(node, request, extra_context=context)
+                       context = self.get_context()
+                       context.update(extra_context or {})
+                       context.update({
+                               'form': form
+                       })
+                       return self.password_set_page.render_to_response(request, extra_context=context)

                
                raise Http404
        
                
                raise Http404
        

-       def password_change(self, request, node=None, extra_context=None):
+       def password_change(self, request, extra_context=None):

                if request.method == 'POST':
                        form = PasswordChangeForm(request.user, request.POST)
                        if form.is_valid():
                if request.method == 'POST':
                        form = PasswordChangeForm(request.user, request.POST)
                        if form.is_valid():


@@ -237,35 +257,39 @@ class LoginMultiView(MultiView):
                else:
                        form = PasswordChangeForm(request.user)
                
                else:
                        form = PasswordChangeForm(request.user)
                

-               context = self.get_context({'form': form})
+               context = self.get_context()

                context.update(extra_context or {})
                context.update(extra_context or {})

-               return self.password_change_page.render_to_response(node, request, extra_context=context)
+               context.update({
+                       'form': form
+               })
+               return self.password_change_page.render_to_response(request, extra_context=context)

        
        

-       def register(self, request, node=None, extra_context=None, token_generator=registration_token_generator):
+       def register(self, request, extra_context=None, token_generator=registration_token_generator):

                if request.user.is_authenticated():
                if request.user.is_authenticated():

-                       return HttpResponseRedirect(node.get_absolute_url())
+                       return HttpResponseRedirect(request.node.get_absolute_url())

                
                if request.method == 'POST':
                        form = RegistrationForm(request.POST)
                        if form.is_valid():
                                user = form.save()
                
                if request.method == 'POST':
                        form = RegistrationForm(request.POST)
                        if form.is_valid():
                                user = form.save()

-                               current_site = Site.objects.get_current()
-                               token = token_generator.make_token(user)
-                               link = 'http://%s/%s/%s/' % (current_site.domain, node.get_absolute_url().strip('/'), reverse('register_confirm', urlconf=self, kwargs={'uidb36': int_to_base36(user.id), 'token': token}).strip('/'))

                                context = {
                                context = {

-                                       'link': link
+                                       'link': self.make_confirmation_link('register_confirm', token_generator, user, request.node)

                                }
                                }

+                               current_site = Site.objects.get_current()

                                self.send_confirmation_email('Confirm account creation at %s' % current_site.name, user.email, self.register_confirmation_email, context)
                                messages.add_message(request, messages.SUCCESS, 'An email has been sent to %s with details on activating your account.' % user.email, fail_silently=True)
                                self.send_confirmation_email('Confirm account creation at %s' % current_site.name, user.email, self.register_confirmation_email, context)
                                messages.add_message(request, messages.SUCCESS, 'An email has been sent to %s with details on activating your account.' % user.email, fail_silently=True)

-                               return HttpResponseRedirect('')
+                               return HttpResponseRedirect(request.node.get_absolute_url())

                else:
                        form = RegistrationForm()
                
                else:
                        form = RegistrationForm()
                

-               context = self.get_context({'form': form})
+               context = self.get_context()

                context.update(extra_context or {})
                context.update(extra_context or {})

-               return self.register_page.render_to_response(node, request, extra_context=context)
+               context.update({
+                       'form': form
+               })
+               return self.register_page.render_to_response(request, extra_context=context)

        
        

-       def register_confirm(self, request, node=None, extra_context=None, uidb36=None, token=None, token_generator=registration_token_generator):
+       def register_confirm(self, request, extra_context=None, uidb36=None, token=None, token_generator=registration_token_generator):

                """
                Checks that a given hash in a registration link is valid and activates
                the given account. If so, log them in and redirect to
                """
                Checks that a given hash in a registration link is valid and activates
                the given account. If so, log them in and redirect to


@@ -281,21 +305,22 @@ class LoginMultiView(MultiView):
                if token_generator.check_token(user, token):
                        user.is_active = True
                        true_password = user.password
                if token_generator.check_token(user, token):
                        user.is_active = True
                        true_password = user.password

+                       temp_password = token_generator.make_token(user)

                        try:
                        try:

-                               user.set_password('temp_password')
+                               user.set_password(temp_password)

                                user.save()
                                user.save()

-                               authenticated_user = authenticate(username=user.username, password='temp_password')
+                               authenticated_user = authenticate(username=user.username, password=temp_password)

                                login(request, authenticated_user)
                        finally:
                                # if anything goes wrong, ABSOLUTELY make sure that the true password is restored.
                                user.password = true_password
                                user.save()
                                login(request, authenticated_user)
                        finally:
                                # if anything goes wrong, ABSOLUTELY make sure that the true password is restored.
                                user.password = true_password
                                user.save()

-                       return self.post_register_confirm_redirect(request, node)
+                       return self.post_register_confirm_redirect(request)

                
                raise Http404
        
                
                raise Http404
        

-       def post_register_confirm_redirect(self, request, node):
-               return HttpResponseRedirect(node.get_absolute_url())
+       def post_register_confirm_redirect(self, request):
+               return HttpResponseRedirect(request.node.get_absolute_url())

        
        class Meta:
                abstract = True
        
        class Meta:
                abstract = True


@@ -303,71 +328,55 @@ class LoginMultiView(MultiView):
 
 class AccountMultiView(LoginMultiView):
        """
 
 class AccountMultiView(LoginMultiView):
        """

-       Subclasses may define an account_profile model, fields from the User model
-       to include in the account, and fields from the account profile to use in
-       the account.
+       By default, the `account` consists of the first_name, last_name, and email fields
+       of the User model. Using a different account model is as simple as writing a form that
+       accepts a User instance as the first argument.

        """
        """

-       manage_account_page = models.ForeignKey(Page, related_name='%(app_label)s_%(class)s_manage_account_page')
-       user_fields = ['first_name', 'last_name', 'email']
-       required_user_fields = user_fields
-       account_profile = None
-       account_profile_fields = None
+       manage_account_page = models.ForeignKey(Page, related_name='%(app_label)s_%(class)s_manage_account_related')
+       email_change_confirmation_email = models.ForeignKey(Page, related_name='%(app_label)s_%(class)s_email_change_confirmation_email_related')
+       account_form = UserAccountForm

        
        @property
        def urlpatterns(self):
                urlpatterns = super(AccountMultiView, self).urlpatterns
                urlpatterns += patterns('',
        
        @property
        def urlpatterns(self):
                urlpatterns = super(AccountMultiView, self).urlpatterns
                urlpatterns += patterns('',

-                       url(r'^account/$', self.login_required(self.account_view), name='account')
+                       url(r'^account/$', self.login_required(self.account_view), name='account'),
+                       url(r'^account/email/(?P<uidb36>\w+)/(?P<email>[\w.]+[+][\w.]+)/(?P<token>[^/]+)/$', self.email_change_confirm, name='email_change_confirm')

                )
                return urlpatterns
        
                )
                return urlpatterns
        

-       def get_account_forms(self):
-               user_form = forms.models.modelform_factory(User, fields=self.user_fields)
-               
-               if self.account_profile is None:
-                       profile_form = None
-               else:
-                       profile_form = forms.models.modelform_factory(self.account_profile, fields=self.account_profile_fields or [field.name for field in self.account_profile._meta.fields if field.editable and field.name != 'user'])
-               
-               for field_name, field in user_form.base_fields.items():
-                       if field_name in self.required_user_fields:
-                               field.required = True
-               return user_form, profile_form
-       
-       def get_account_form_instances(self, user, data=None):
-               form_instances = []
-               user_form, profile_form = self.get_account_forms()
-               if data is None:
-                       form_instances.append(user_form(instance=user))
-                       if profile_form:
-                               form_instances.append(profile_form(instance=self.account_profile._default_manager.get_or_create(user=user)[0]))
-               else:
-                       form_instances.append(user_form(data, instance=user))
-                       if profile_form:
-                               form_instances.append(profile_form(data, instance=self.account_profile._default_manager.get_or_create(user=user)[0]))
-               
-               return form_instances
-       
-       def account_view(self, request, node=None, extra_context=None):
+       def account_view(self, request, extra_context=None, token_generator=email_token_generator, *args, **kwargs):

                if request.method == 'POST':
                if request.method == 'POST':

-                       form_instances = self.get_account_form_instances(request.user, request.POST)
+                       form = self.account_form(request.user, request.POST, request.FILES)

                        
                        

-                       for form in form_instances:
-                               if not form.is_valid():
-                                       break
-                       else:
-                               for form in form_instances:
-                                       form.save()
+                       if form.is_valid():
+                               if 'email' in form.changed_data:
+                                       # ModelForms modify their instances in-place during validation,
+                                       # so reset the instance's email to its previous value here,
+                                       # then remove the new value from cleaned_data.
+                                       request.user.email = form.initial['email']
+                                       
+                                       email = form.cleaned_data.pop('email')
+                                       
+                                       context = {
+                                               'link': self.make_confirmation_link('email_change_confirm', token_generator, request.user, request.node, token_args=[email], reverse_kwargs={'email': email.replace('@', '+')})
+                                       }
+                                       current_site = Site.objects.get_current()
+                                       self.send_confirmation_email('Confirm account email change at %s' % current_site.domain, email, self.email_change_confirmation_email, context)
+                                       messages.add_message(request, messages.SUCCESS, "An email has be sent to %s to confirm the email change." % email)
+                               
+                               form.save()

                                messages.add_message(request, messages.SUCCESS, "Account information saved.", fail_silently=True)
                                return HttpResponseRedirect('')
                else:
                                messages.add_message(request, messages.SUCCESS, "Account information saved.", fail_silently=True)
                                return HttpResponseRedirect('')
                else:

-                       form_instances = self.get_account_form_instances(request.user)
+                       form = self.account_form(request.user)

                
                

-               context = self.get_context({
-                       'forms': form_instances
-               })
+               context = self.get_context()

                context.update(extra_context or {})
                context.update(extra_context or {})

-               return self.manage_account_page.render_to_response(node, request, extra_context=context)
+               context.update({
+                       'form': form
+               })
+               return self.manage_account_page.render_to_response(request, extra_context=context)

        
        def has_valid_account(self, user):
                user_form, profile_form = self.get_account_forms()
        
        def has_valid_account(self, user):
                user_form, profile_form = self.get_account_forms()


@@ -386,16 +395,44 @@ class AccountMultiView(LoginMultiView):
        def account_required(self, view):
                def inner(request, *args, **kwargs):
                        if not self.has_valid_account(request.user):
        def account_required(self, view):
                def inner(request, *args, **kwargs):
                        if not self.has_valid_account(request.user):

-                               messages.add_message(request, messages.ERROR, "You need to add some account information before you can post listings.", fail_silently=True)
+                               if not request.method == "POST":
+                                       messages.add_message(request, messages.ERROR, "You need to add some account information before you can access this page.", fail_silently=True)

                                return self.account_view(request, *args, **kwargs)
                        return view(request, *args, **kwargs)
                
                inner = self.login_required(inner)
                return inner
        
                                return self.account_view(request, *args, **kwargs)
                        return view(request, *args, **kwargs)
                
                inner = self.login_required(inner)
                return inner
        

-       def post_register_confirm_redirect(self, request, node):
+       def post_register_confirm_redirect(self, request):

                messages.add_message(request, messages.INFO, 'Welcome! Please fill in some more information.', fail_silently=True)
                messages.add_message(request, messages.INFO, 'Welcome! Please fill in some more information.', fail_silently=True)

-               return HttpResponseRedirect('/%s/%s/' % (node.get_absolute_url().strip('/'), reverse('account', urlconf=self).strip('/')))
+               return HttpResponseRedirect(self.reverse('account', node=request.node))
+       
+       def email_change_confirm(self, request, extra_context=None, uidb36=None, token=None, email=None, token_generator=email_token_generator):
+               """
+               Checks that a given hash in an email change link is valid. If so, changes the email and redirects to the account page.
+               """
+               assert uidb36 is not None and token is not None and email is not None
+               
+               try:
+                       uid_int = base36_to_int(uidb36)
+               except:
+                       raise Http404
+               
+               user = get_object_or_404(User, id=uid_int)
+               
+               email = '@'.join(email.rsplit('+', 1))
+               
+               if email == user.email:
+                       # Then short-circuit.
+                       raise Http404
+               
+               if token_generator.check_token(user, email, token):
+                       user.email = email
+                       user.save()
+                       messages.add_message(request, messages.SUCCESS, 'Email changed successfully.')
+                       return HttpReponseRedirect(self.reverse('account', node=request.node))
+               
+               raise Http404

        
        class Meta:
                abstract = True
\ No newline at end of file
        
        class Meta:
                abstract = True
\ No newline at end of file