Re: Django Login/Session Not Sticking

[Juergen Schackmann]

I do have the same issue with django admin, and definitely no custom js 
there. any other ideas???

Am Freitag, 6. Juni 2014 13:50:31 UTC+2 schrieb Juergen Schackmann:
>
> none of my js is fiddling with sessions/cookies. but there are numerous 
> third party js packages included (for ads etc). so any of those could do 
> strange things, this would also explain why it broke all of a sudden. could 
> you provide more details on the underlying issue that you had. this would 
> help me to search for the issue.
>
> Am Freitag, 6. Juni 2014 06:32:30 UTC+2 schrieb somecallitblues:
>>
>> I know this may sound silly but is there some kind of JavaScript code 
>> that may be messing things up? Had a similar issue before and it was 
>> related to JavaScript stupidity. 
>> On 05/06/2014 10:39 pm, "Juergen Schackmann" <juergen.s...@gmail.com> 
>> wrote:
>>
>>> - all app servers are running the same code with same settings.
>>> - DNS load balancing was never used
>>> - just did a htop, no unexpected or old processes
>>>
>>> Am Donnerstag, 5. Juni 2014 11:37:30 UTC+2 schrieb Erik Cederstrand:
>>>>
>>>> Den 04/06/2014 kl. 13.55 skrev Juergen Schackmann <
>>>> juergen.s...@gmail.com>: 
>>>>
>>>> > The production site is served via a load balancer and 8 application 
>>>> servers. Even stranger: if I test the same code (with the same settings) 
>>>> on 
>>>> a test server, that is not load balanced and basically has not traffic, 
>>>> everything is working fine. 
>>>>
>>>> Are you sure all app servers are running the same code? Same 
>>>> settings.py? DNS load balancing you forgot about? Maybe you have some 
>>>> lingering app server processes that were never shut down? Check the start 
>>>> date of all WSGI processes to be sure. 
>>>>
>>>> Erik 
>>>>
>>>>
>>>> PS: You may have sweaty palms, but please don't triple post the same 
>>>> question to the list.
>>>
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>>>
>>

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Re: Django Login/Session Not Sticking

[Juergen Schackmann]

none of my js is fiddling with sessions/cookies. but there are numerous 
third party js packages included (for ads etc). so any of those could do 
strange things, this would also explain why it broke all of a sudden. could 
you provide more details on the underlying issue that you had. this would 
help me to search for the issue.

Am Freitag, 6. Juni 2014 06:32:30 UTC+2 schrieb somecallitblues:
>
> I know this may sound silly but is there some kind of JavaScript code that 
> may be messing things up? Had a similar issue before and it was related to 
> JavaScript stupidity. 
> On 05/06/2014 10:39 pm, "Juergen Schackmann" <juergen.s...@gmail.com 
> > wrote:
>
>> - all app servers are running the same code with same settings.
>> - DNS load balancing was never used
>> - just did a htop, no unexpected or old processes
>>
>> Am Donnerstag, 5. Juni 2014 11:37:30 UTC+2 schrieb Erik Cederstrand:
>>>
>>> Den 04/06/2014 kl. 13.55 skrev Juergen Schackmann <
>>> juergen.s...@gmail.com>: 
>>>
>>> > The production site is served via a load balancer and 8 application 
>>> servers. Even stranger: if I test the same code (with the same settings) on 
>>> a test server, that is not load balanced and basically has not traffic, 
>>> everything is working fine. 
>>>
>>> Are you sure all app servers are running the same code? Same 
>>> settings.py? DNS load balancing you forgot about? Maybe you have some 
>>> lingering app server processes that were never shut down? Check the start 
>>> date of all WSGI processes to be sure. 
>>>
>>> Erik 
>>>
>>>
>>> PS: You may have sweaty palms, but please don't triple post the same 
>>> question to the list.
>>
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>> .
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>> To view this discussion on the web visit 
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>>  
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>> .
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>>
>

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Re: Django Login/Session Not Sticking

[Juergen Schackmann]

- all app servers are running the same code with same settings.
- DNS load balancing was never used
- just did a htop, no unexpected or old processes

Am Donnerstag, 5. Juni 2014 11:37:30 UTC+2 schrieb Erik Cederstrand:
>
> Den 04/06/2014 kl. 13.55 skrev Juergen Schackmann <juergen.s...@gmail.com 
> >: 
>
> > The production site is served via a load balancer and 8 application 
> servers. Even stranger: if I test the same code (with the same settings) on 
> a test server, that is not load balanced and basically has not traffic, 
> everything is working fine. 
>
> Are you sure all app servers are running the same code? Same settings.py? 
> DNS load balancing you forgot about? Maybe you have some lingering app 
> server processes that were never shut down? Check the start date of all 
> WSGI processes to be sure. 
>
> Erik 
>
>
> PS: You may have sweaty palms, but please don't triple post the same 
> question to the list.

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Re: Django Login/Session Not Sticking

[Juergen Schackmann]

*PLEASE HELP: I am not sure if this is a bug or caused by my code. But this 
is a serious issue for my production site.*


To get some more debug information, I have created this Middleware:


from django.conf import settings

class SessionDebugMiddleware(object):
def process_response(self, request, response):
session = request.session
user = getattr(request, 'user', None)
if user:
user=user.id
session_key = request.COOKIES.get(settings.SESSION_COOKIE_NAME, 
None)
response['X-Meta-Requ'] = '{0},{1},{2},{3}'.format(session_key, 
session.get('_auth_user_id'), session.get('_auth_user_backend','---'), user)
return response


If I hit the refresh button 10 times, 
8 times I will get this 
header:  X-Meta-Requ:igv0xshezhdxh50kks9x00r0l67mx0sk,None,---,None
2 times I will get this header: 
X-Meta-Requ:igv0xshezhdxh50kks9x00r0l67mx0sk,330619,django.contrib.auth.backends.ModelBackend,330619

It seems be be random and does not follow any logic.

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Re: Django Login/Session Not Sticking

[Juergen Schackmann]

*PLEASE HELP: I am not sure if this is a bug or caused by my code. But this 
is a serious issue for my production site.*


To get some more debug information, I have created this Middleware:


from django.conf import settings

class SessionDebugMiddleware(object):
def process_response(self, request, response):
session = request.session
user = request.user
session_key = request.COOKIES.get(settings.SESSION_COOKIE_NAME, 
None)
x_meta_requ = '{0},{1},{2},{3}'.format(session_key, 
session.get('_auth_user_id'), session.get('_auth_user_backend','---'), 
user.id)
response['X-Meta-Requ'] = '{0},{1},{2},{3}'.format(session_key, 
session.get('_auth_user_id'), session.get('_auth_user_backend','---'), 
user.id)
return response

If I hit the refresh button 10 times, 
8 times I will get this 
header:  X-Meta-Requ:igv0xshezhdxh50kks9x00r0l67mx0sk,None,---,None
2 times I will get this header: 
X-Meta-Requ:igv0xshezhdxh50kks9x00r0l67mx0sk,330619,django.contrib.auth.backends.ModelBackend,330619

It seems be be random and does not follow any logic.

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Re: Django Login/Session Not Sticking

[Juergen Schackmann]

*PLEASE HELP: I am not sure if this is a bug or caused by my code. But this 
is a serious issue for my production site.*


To get some more debug information, I have created this Middleware:


from django.conf import settings

class SessionDebugMiddleware(object):
def process_response(self, request, response):
session = request.session
user = request.user
session_key = request.COOKIES.get(settings.SESSION_COOKIE_NAME, 
None)
x_meta_requ = '{0},{1},{2},{3}'.format(session_key, 
session.get('_auth_user_id'), session.get('_auth_user_backend','---'), 
user.id)
response['X-Meta-Requ'] = '{0},{1},{2},{3}'.format(session_key, 
session.get('_auth_user_id'), session.get('_auth_user_backend','---'), 
user.id)
return response

If I hit the refresh button 10 times, 
8 times I will get this 
header: igv0xshezhdxh50kks9x00r0l67mx0sk,None,---,None
2 times I will get this header: 
X-Meta-Requ:igv0xshezhdxh50kks9x00r0l67mx0sk,330619,django.contrib.auth.backends.ModelBackend,330619

It seems be be random and does not follow any logic.


Am Mittwoch, 4. Juni 2014 13:55:38 UTC+2 schrieb Juergen Schackmann:
>
> Hi all, 
> this question refers to this previous question: 
> https://groups.google.com/forum/#!topic/django-users/8IXEvfU72S4. 
> However, it seems like the problem is slightly different, I decided to open 
> a new question:
>
> After my site has been up and running for a while in production, I 
> suddenly have a problem with my users loging into it.
>
>1. I have protected certain views/pages with the login_required 
>decorator and I am also using the django admin.
>2. When an anonymous user hits any of these pages, he is redirected to 
>the login page.
>3. When this anonymous user adds its credentials, the POST request is 
>successful and he is redirected to the inital page. At the same time, the 
>user gets a new sessionid (as expected)
>4. However, now the results get very unreliable. When pressing reload 
>or when navigating to other pages (that require a login), either of the 2 
>outcomes might happen:
>
>
>- a) The user is identified and the page is displayed correctly
>- b) The user is redirect to the login page.
>
> I have checked the content of the session via the shell, and nothing is 
> changing there.
>
> The production site is served via a load balancer and 8 application 
> servers. Even stranger: if I test the same code (with the same settings) on 
> a test server, that is not load balanced and basically has not traffic, 
> everything is working fine.
>
> I am running Django 1.6 on Ubuntu with Apache and mod_wsgi in daemon mode 
> behind SSL and I am using the Session database backend. I am using 
> django-allauth.account for account management/login. My Session settings 
> are like this:
>
> SESSION_COOKIE_HTTPONLY = True
> SESSION_COOKIE_AGE = 60*60*24
> SESSION_COOKIE_SECURE = True
>
> So I have the following questions/ideas?
>
> 1. Can this be related to loadbalancing in anyway? My understanding was 
> that Django does not need sticky sessions, when the DB session backend is 
> used.
>
> 2. Can this be related to a threading issue?
>
> 3. Can this be related to high load?
>
> 4. Can this be related to a decoding issue: 
> https://github.com/django/django/blob/master/django/contrib/sessions/backends/base.py#L83.
>  
> However, I have not found any log entries that refer to "Session data 
> corrupted".
>
> Any other hints are welcome.
>
>
>

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Re: URLs: mymodel_id vs object_id vs pk ....

[Juergen Schackmann]

I am not aware of any best practices for wording here, though my general 
recommendaton would the wording should be identical to the attribute name 
of the model, e.d. 'id', 'slug' or whatever. I would not add the "mymodel" 
prefix as long as it becomes clear from the context to which model it 
belongs to. 

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Re: django-loses-currently-logged-in-user

[Juergen Schackmann]

I have opend another question for this issue:
https://groups.google.com/forum/#!topic/django-users/MBcu77WFCMw

Am Dienstag, 3. Juni 2014 14:28:52 UTC+2 schrieb Juergen Schackmann:
>
> Hi all,
>
> I have a issue, with users not being able to log into my site anymore 
> (after it worked fine for months).
>
> Please find details here: 
> https://stackoverflow.com/questions/24015143/django-loses-currently-logged-in-user
>
> Any help is highly appreciated.
>
> Regards,
> Juergen
>

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Django Login/Session Not Sticking

[Juergen Schackmann]

Hi all, 
this question refers to this previous 
question: https://groups.google.com/forum/#!topic/django-users/8IXEvfU72S4. 
However, it seems like the problem is slightly different, I decided to open 
a new question:

After my site has been up and running for a while in production, I suddenly 
have a problem with my users loging into it.

   1. I have protected certain views/pages with the login_required 
   decorator and I am also using the django admin.
   2. When an anonymous user hits any of these pages, he is redirected to 
   the login page.
   3. When this anonymous user adds its credentials, the POST request is 
   successful and he is redirected to the inital page. At the same time, the 
   user gets a new sessionid (as expected)
   4. However, now the results get very unreliable. When pressing reload or 
   when navigating to other pages (that require a login), either of the 2 
   outcomes might happen:


   - a) The user is identified and the page is displayed correctly
   - b) The user is redirect to the login page.

I have checked the content of the session via the shell, and nothing is 
changing there.

The production site is served via a load balancer and 8 application 
servers. Even stranger: if I test the same code (with the same settings) on 
a test server, that is not load balanced and basically has not traffic, 
everything is working fine.

I am running Django 1.6 on Ubuntu with Apache and mod_wsgi in daemon mode 
behind SSL and I am using the Session database backend. I am using 
django-allauth.account for account management/login. My Session settings 
are like this:

SESSION_COOKIE_HTTPONLY = True
SESSION_COOKIE_AGE = 60*60*24
SESSION_COOKIE_SECURE = True

So I have the following questions/ideas?

1. Can this be related to loadbalancing in anyway? My understanding was 
that Django does not need sticky sessions, when the DB session backend is 
used.

2. Can this be related to a threading issue?

3. Can this be related to high load?

4. Can this be related to a decoding issue: 
https://github.com/django/django/blob/master/django/contrib/sessions/backends/base.py#L83.
 
However, I have not found any log entries that refer to "Session data 
corrupted".

Any other hints are welcome.


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django-loses-currently-logged-in-user

[Juergen Schackmann]

Hi all,

I have a issue, with users not being able to log into my site anymore 
(after it worked fine for months).

Please find details here: 
https://stackoverflow.com/questions/24015143/django-loses-currently-logged-in-user

Any help is highly appreciated.

Regards,
Juergen

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Re: "Dynamyc" modells

[Juergen Schackmann]

hi guys,
django-dynamo https://bitbucket.org/schacki/django-dynamo will let users 
create models dynamically on the fly through the admin. maybe this helps.
regards,
juergen

Am Dienstag, 13. März 2012 08:48:03 UTC+1 schrieb airween:
>
> hi,
>
> On Mon, Mar 12, 2012 at 09:51:43PM -0400, Dennis Lee Bieber wrote:
> > On Mon, 12 Mar 2012 22:14:27 +0100, Ervin Hegedüs 
> > declaimed the following in gmane.comp.python.django.user:
> > 
> > 
> > > Some promotion has few millions of records, different promotions have
> > > different format of codes, ... And general: I'm looking for an ultimate
> > > solution, and may be the next time every ListRecord will have different
> > > columns.
> > >
> > Strangely, your "ultimate solution" might mean implementing a 
> DBMS
> > AS the application, rather than just USING a DBMS...
> > 
> > That is: maintaining a data dictionary which contains "promotion
> > format", "promotion field", "field type", (maybe field position too,
> > along with fields to identify constraints on the valid values);
> [...]
>
> yes, it's absolutely true.
>
> But :), I'm so far from there I implement full of these.
>
>
> It's no problem, I'm just looking for a good solution, first it
> could be enough to implement all() method (and filter()), and
> there is an important invariant: in my (all) cases, the different
> ListItems has an intersect of columns, I mean there are a few
> columns, which exists in all ListItems object.
>
>
> Any idea?
>
>
> Thanks:
>
>
> a.
>
>
> -- 
> I � UTF-8
>
>

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Re: Class-Based Generic Views (CreateView) - field exclusions and defaults

[Juergen Schackmann]

you made my day, working exactly like expected.  :-)
thanks a lot

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Re: Class-Based Generic Views (CreateView) - field exclusions and defaults

[Juergen Schackmann]

I am trying to do the same as described in previous example:
I have a model with a foreign key field to User and in the view I want to 
populate the the field from request.user. 

And when doing it exactly the way as Russ proposed, I get the described 
error.

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Re: Class-Based Generic Views (CreateView) - field exclusions and defaults

[Juergen Schackmann]

can really no one help? i am really stuck here at the moment

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Re: A demo of django-inlinetrans and django-inplaceedit

[Juergen Schackmann]

>
>  
>
>> 2. If I do not want to send field by field, but possibly a set of fields 
>> back to the to the server, like the row of a table. Would that be feasible?
>>
>
> Now this is not implemented, and I think it is not trivial. But you can 
> try it
>
i am afraid my js skills are too limited for that :-( 

>
> 3. How would you create a new field on the page/ new object in the model?
>>
>
> I'm sorry I don't understand this
>
let me explain with an example: i have an recipe model and i have 
ingredients that have a foreign key to recipe.  on the web page i display 
the recipe plus all its ingredients. and with inplaceedit i can edit all 
those ingredients, which is great. but how would i enable the user to add a 
new ingredient?
 

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Re: A demo of django-inlinetrans and django-inplaceedit

[Juergen Schackmann]

Hi, 
this looks really great.
I have 3 questions for which I would highly appreciate the answers:

1. What is the best way to include some form magic, i.e. sending the 
changes not directly to the model but to a form that does some verification 
and also return the form error messages?
2. If I do not want to send field by field, but possibly a set of fields 
back to the to the server, like the row of a table. Would that be feasible?
3. How would you create a new field on the page/ new object in the model?

Keep up the great work
Juergen

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Re: Class-Based Generic Views (CreateView) - field exclusions and defaults

[Juergen Schackmann]

if is use this code, as proposed by russ:
def form_valid(self, form):
self.object.user = ... (something meaningful.. e.g., 
self.request.user)
return super(CreateCampaignView, self).form_valid(form)

i get the error 'NoneType' object has no attribute 'user'. and actually, by 
looking at the source code, that is exactly what is supposed to happen in a 
create view: self.object is set to None, as you can see in BaseCreateView

def post(self, request, *args, **kwargs):
self.object = None
return super(BaseCreateView, self).post(request, *args, **kwargs)

am i the only one having this problem? any help is highly appreciated. 
thanks
juergen

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Re: Pyjamas in Django

[Juergen Schackmann]

hi,
i have played around with it, and it seemed ok for me. 
but actually never put anything into production, since my project did not 
move forward.
regards

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Aw: Re: can django be used in destop application?

[Juergen Schackmann]

if you still want to go down the "use django for desktop application" road, 
you might want to have a look at pyjamas to build your frontend: pyjs.org

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ANN: django-dynamo

[Juergen Schackmann]

Hi all,

I have been thinking about dynamic models in Django for a while now. And 
inspired by https://code.djangoproject.com/wiki/DynamicModels and Will 
Hardy's https://github.com/willhardy/dynamic-models, I have created Dynamo, 
to  let users and admins create and maintain their models dynamically at 
runtime. 

It is certainly not perfect yet, but I hope it is of some use for the 
community. 
The code can be found at https://bitbucket.org/schacki/django-dynamo and the 
docs at http://django-dynamo.readthedocs.org/en/latest/

Any feedback and contributions are highly appreciated.

Regards,
Juergen

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Aw: Re: Problem With Templatetags

[Juergen Schackmann]

have you added the application that holds your template tag to settings.py?

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Aw: Re: any recipes for 'live' updating a site with model changes

[Juergen Schackmann]

I will publish a new app to maintain models dynamically at runtime on the 
weekend

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Aw: Re: Fieldsets in Admin Inline

[Juergen Schackmann]

thanks a lot for googling this link (somehow google decided to hide it from 
me :-) )
it works for me!

just one word warning with the link: the code as described does not work for 
me, since the parent Admin refers to field in its fieldsets attribute that 
refer to the child and this raises the error: 

ImproperlyConfigured at ...

MetaModelAdmin.fieldsets[2][1]['fields']' refers to field 'type' that is 
missing from the form

after removing the specific field and only leave it in the fieldsets of the 
Inline, everything is working fine

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Fieldsets in Admin Inline

[Juergen Schackmann]

Hi all,
is there a way to define fieldsets in the Inline?
If could not find anything in the docs, but to me the idea sounds quite 
reasonable; so I am wondering if I just dont find it?!?!?!
Thanks
Juergen

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Aw: Django: forms and custom templates

[Juergen Schackmann]

I am also not sure, what exactly you are looking for, but what about this:
https://docs.djangoproject.com/en/1.3/topics/forms/#customizing-the-form-template
so you will have complete control of your html code??? 

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Aw: Re: Setting up EC2 for Django

[Juergen Schackmann]

maybe http://www.turnkeylinux.org/ and especially 
http://www.turnkeylinux.org/django will do the heavy lifting for you

although I fully agree with the other replies, and I am not sure if you do 
yourself a favour using turnkeylinux just as a blackbox :-)

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Aw: Different urlpatterns for different subdomains

[Juergen Schackmann]

maybe that helps: https://github.com/jezdez/django-hosts

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Aw: Virtualized Django app image for dev replication?

[Juergen Schackmann]

Hi ydjango,
from personal experience, Virtualbox is really easy to use and setup and 
quite lightweight. If you use e.g. this image 
http://www.turnkeylinux.org/django, you will be ready to go very fast.
Regards,
Juergen

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How to programatically define Site in Admin

[Juergen Schackmann]

Hi all,

I do have various models with ForeignKey(Site). These models should be 
managed through Admin. However, I would like to determine the current site 
based on the URL (which basically means it needs to be defined in the view 
based on the request object). However, he current default behaviour of admin 
is that it displays the site field and lets the user choose the site.
 
My requirements are:
1. The user will only ever see objects for the current site (derived from 
the URL following a certain logic) 
2. The user will NOT see the site field (since it is not relevant for him)
3. The user will NOT be able to choose a site when updating or adding 
objects, but the site will be assigned in the background programmatically

My solutions so far are:
1. I adapted queryset() to filter on the current site ==> so I think that 
box is ticked

2. I adapted the fields attribute ==> so this works for the list view, but 
not in the detail view (change view) and not in the add view

3. I have no clue how to get that one.

Any help is highly appreciated.
Thanks a lot
schacki


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Re: Versioned database content

[Juergen Schackmann]

see here
http://djangopackages.com/grids/g/versioning/

ore there is also a interesting chapter on versioning on page 263 here: 
http://books.google.com/books?id=lJwOcsZq5g4C=frontcover=django+pro=de=TdA-TdSyH4GA4Aat1fGwCg=X=book_result=book-thumbnail=1=0CCwQ6wEwAA#v=onepage=false
 

please share your results

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Re: Versioned database content

[Juergen Schackmann]

why do you want to create the dual tables, instead of only having one table 
with a current tag that holds the old version and the current ones? and then 
handle access to those via different managers?
have you also had a look at the available versioning apps?

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