I think I get the point.
If I write
obj=MyModel()
obj.domaine=request.session.get("domaine")
form=MyModelForm(instance=obj)
if form.is_valid():
form.save()
It works (but I didn't populate my form)
So it seems that the data provided in data=request.POST are overwriting my
domaine field.
It is really curious, because request.POST doesn't contain any reference to my
field domaine
It's look like a bug, isn't it ?
Le samedi 27 mars 2010 15:54:53, Thierry Chich a écrit :
> Le samedi 27 mars 2010 14:39:40, Thierry Chich a écrit :
> > Hello all
> >
> > I have a problem to understand something. I could find some workaround
> > easily, but I don't want it. I want to understand.
> >
> > So this if the situation. I have a modelForm (MyModelForm) that is build
> > on a model (MyModel) with one field mandatory (domaine - and it is a
> > Foreignkey). I don't want to show it to the user. I want it set in the
> > program
> >
> > I wrote this code in my view:
> >
> > if request.method == 'POST'
> > obj=MyModel()
> > obj.domaine=request.session.get("domaine")
> > form=MyModelForm(request.POST,instance=obj)
> > if form.is_valid():
> > obj.save()
>
> Smal mistake: it is form.save(), but it doesn't change nothing about the
> problem. It never enter in this cond. form is not valid.
>
> > I was thinking that since obj already contain a 'domaine', it will not
> > complaining, but it is not the case. the form is considered as no valid
> > because of the domaine field. It is really disturbing for two reason:
> >
> > 1) with the debugger, I clearly see the domaine object in obj. I also see
> > a form.fieds.domaine that looks great.
> >
> > 2) In an other part, that work this time, I have something pretty
> > similar. I modified an obj already existant
>
> Forget this point. It doesn't work. i don't know why. A regression, I
> believe.... So the idea doesn't seems work at all. If somebody know why
> ...
>
> > if request.method == 'POST':
> > obj=get_object_or_404(MyModel,id=id)
> > form=MyModelForm(request.POST,instance=obj)
> > if form.is_valid():
> > form.save()
> >
> > If some of you have an idea, I would be thanksfull.
> >
> > Thierry
>
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