multi-table inheritance and modification of OneToOneField options

optionally (Invoice Address) and to one class it is required (Residence Address). Base class is Address.) Thanks in advance. Jan Ostrochovsky --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Django users&quo

Re: multi-table inheritance and modification of OneToOneField options

Tredinnick wrote: > On Thu, 2009-08-06 at 07:15 -0700, Jan Ostrochovsky wrote: > > Hello, > > >http://docs.djangoproject.com/en/dev/topics/db/models/#multi-table-in... > > says: > > The inheritance relationship introduces links between the child model >

automatic initialization of sample data

question is: is there some existing solution for this (in Django or its extensions), which we can use, and not reinvent it, or not? Any idea? (We are using Django Evolution, which is good help, but only when changes are not too dramatic.) Thanks in advance. Jan Ostrochovsky

Re: automatic initialization of sample data

r chain of init_sample_data() functions: > > $ python manage.py shell > > >>> import myproject.myapp.models as m > >>> m.run_data_inits() > >>> ^D > > Bill > > On Thu, Aug 20, 2009 at 9:25 AM, Jan Ostrochovsky < > > jan.ostrochov...

multi-table inheritance - how to access child object methods/attributes

Hello, class Document(models.Model): ... class AccountingDocument(Document): ... How am I able to access methods an attributes of some AccountingDocument instance (e.g. its __unicode__()) from Document instance? How am I able to retrieve child object from its parent? I tried to search on t

Re: Django, MySQL, unicode

Hi Tracy, less than two months ago, we were trying to use MySQL in our Django project (because we were not successful with installation of PostgreSQL adapter for Python psycopg2 on Mac OS X). We had similar problems as you have, and ugly, but only found, solution was to add encode (or decode? I

Re: PostgreSQL or MySQL, What are the +'s and -'s?

I won't compare PostgreSQL and MySQL as whole, because: - I do not know MySQL so well, as PostgreSQL - another flamewar could arise ;) I am only saying: my experience with Django+PostgreSQL is far better, than Django+MySQL, see http://groups.google.com/group/django-users/browse_thread/thread/3abf

Re: psycopg2.OperationalError: FATAL: role "root" does not exist

How exactly did you put your database user? What is content of your pg_hba.conf? Maybe some parts of this could be helpful: http://sharpe-s-postgres.blogspot.com/2009/09/how-to-install-and-configure-postgresql.html/ On Sep 7, 11:15 pm, Zico wrote: > On Tue, Sep 8, 2009 at 3:06 AM, Angel Cruz wr

Re: Error in setting up psycopg2

Hi Simon, I had also problems with psycopg2 on Mac OS X. First with development server (python manage.py runserver), and when solved, later also with Apache. Finally I decided for Linux on production server (with Apache), and let Mac OS X on development workstations (with runserver). If such se

Re: multi-table inheritance - how to access child object methods/attributes

+ self.id_ But I'd prefer solution, where Document class does not know about its child classes (AccountingDocument, etc.). Any idea? On Sep 8, 8:31 am, Jan Ostrochovsky wrote: > Hello, > > class Document(models.Model): >   ... > > class AccountingDocument(Document): &g

Re: multi-table inheritance - how to access child object methods/attributes

t;                 sub = getattr(self, field, None) >                 return sub.__unicode__() >             except ObjectDoesNotExist: >                 pass > >         return u'Document {0}'.format(self.id) > > On Sep 8, 9:01 am, Jan Ostrochovsky > wrote: > &g

Re: automatic initialization of sample data

ion to another version, it is unthinkable to put production data in the code ;). But when developing application (currently my case), there is only relatively small set of sample testing data, and I see as big avantage and developer's comfort, to be able modify sample data accordingly wi

Unique fields that allow nulls

Hello, I have the exact need, as author of this question: http://stackoverflow.com/questions/454436/unique-fields-that-allow-nulls-in-django. I want a value to be unique, if it is not NULL. Database backend allows such construction, but in Django admin I have got this error message when saving f

Re: Unique fields that allow nulls

parameter defined and in that case it must be unique, or it is not defined at all. On Sep 9, 4:35 pm, Karen Tracey wrote: > On Wed, Sep 9, 2009 at 9:14 AM, Jan Ostrochovsky > > wrote: > > > Hello, > > > I have the exact need, as author of this question: > > >http:

capacity planning (server sizing) for Apache+Django+PostgreSQL

Hello, are there some calculators or best practises or other tools/methods, how to size server hardware for Django applications from assumed load (concurrent users, etc.)? Thanks in advance for any advice. Jano --~--~-~--~~~---~--~~ You received this message beca