The speaker raises some good issue with Django and some do apply to
web2py
Aside for the many jokes which are indeed funny he complains about
scalability and make these valid points:
1) session should be stored client side for scalability (web2py and
Django both store them server side, although it it would be trivial to
have a client side option and it is on my todo list, I will take a
patch if somebody does this first)
2) it is important to be able to connect to multiple databases
depending on the request (Django cannot do it, web2py can) I also just
added a modification in trunk that allows to do:
db=DAL([uri1,uri2,uri3])
and it will try to connect to uri1, then uri2, then uri3. Of course
you can do
db=DAL(random_permute(uri1,uri2,uri3))
to share the load at random. web2py will also try them all in case of
failure and re-try 5 times.
3) it would be nice if the ORM and DAL were to be smart about de-
normalization and about multiple db connection. There is a lot that
can be done in this direction. web2py allows an easy API to
denormalize many2many:
# define some shortcuts
D,F=db.define_table, Field
# define a table dog, a person, and ownership
d=D('dog',F('name'))
p=D('person',F('name'),F('dogs'))
L=D('ownership',F('person',p),F('dog',d))
# denormalize p.dogs
p.dogs.requires=IS_IN_DB(db,d.id,d.name,multiple=True)
# p.dogs will be used in forms, when it changes update L
def f(form):
db(L.person==form.vars.id).delete()
[L.insert(person=form.var.id,dog=k) for k in
form.request_vars.dogs]
crud.settings.create_onaccept.person.append(f)
crud.settings.update_onaccept.person.append(f)
In principle the job of the last 5 lines could be automated and be
done under the hood (what the user speaks about). It would be too much
magic but it would be convenient. We have been discussing some of
this.
On Jul 29, 2:53 pm, Vidul Petrov <vidul.r...@gmail.com> wrote:
> Django (the opposite of RoR) sucks likes RoR (the Denmark salesman vs
> the desparate Kanzas Python programmers ambitions to create everything
> out of nothing).
>
> Probably you know what's the definition of the Nobel winners for
> intellect - adequacy.
>
> And in order to achieve adequacy we need compromises - web2py.
>
> On Jul 29, 7:08 pm, Wobmofo <muito...@gmail.com> wrote:
>
> > Cal Henderson delivered a very enterteining keynote at DjangoCon 2008.
> > Go watch the video if you haven't, it's really funny
> > !http://www.youtube.com/watch?v=i6Fr65PFqfk
