i used

python manage.py sqlall <appname>

you're right sam, when i set null to true, it doesn't really change. 
thank you so very much.
i'm a newbie with databases and i don't know what statements sould i use... 
i don't know the syntax...
i would install south. thank you.

 thank you so very much.
but i'm a newbie with databases, should i type something like this in the 
dbshell? 

UPDATE BOOKS_BOOK SET PUBLICATION_DATE NULL=TRUE

On Wednesday, March 26, 2014 11:40:03 AM UTC-4, Sam Walters wrote:
>
> Did you perhaps change the schema of the database after you had created it.
>
> Eg: added null=True as a constraint after creating the table?
>

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