Re: Getting value from session in ModelForm
I understand what you mean about the scope
Thanks for the sample code, very helpful, will try it out and let you
know.
Thanks,
On Feb 8, 2:45 pm, Daniel Roseman wrote:
> On Monday, February 7, 2011 8:27:55 PM UTC, SimpleDimple wrote:
>
> > I am new to Django and building a school system but am an experienced
> > developer otherwise having firm grip over rails, .net, php & java.
>
> > I have the following class where on teacher add/edit form, I am trying
> > to filter values in class drop down based on school. The value of
> > school_id is saved in session but as you can see below pulling value
> > from session fails in ModelForm, can someone please guide me on how to
> > get the value from session here ?
>
> > class TeacherForm(ModelForm):
> > def __init__(self, *args, **kwargs):
> > super(TeacherForm, self).__init__(*args, **kwargs)
> > xclass = self.fields['xclass'].widget
>
> > choices = []
>
> > #school_id = request.session['school_id'] # since this
> > fails, I have hard coded the value 2 in line below for now
> > school_id = 2
> > xclasses = Class.objects.filter(school=school_id)
> > for c in xclasses:
> > choices.append((c.id,c.name))
> > xclass.choices = choices
>
> It's fundamental to Python programming generally - and, I would have
> thought, Java and Ruby (although not PHP) - that if you want access to an
> object in a scope, you need to pass it into that scope. In order for you to
> access request.session within that __init__ method, you'll need to
> explicitly make the request object available there, which means passing it
> in when you initialise the form.
>
> I usually do it like this:
>
> class MyForm(forms.ModelForm):
> def __init__(self, *args, **kwargs):
> request = kwargs.pop('request')
> super(TeacherForm, self).__init__(*args, **kwargs)
> ...etc...
>
> now initialise the form in your view:
>
> form = MyForm(request=request)
>
> --
> DR.
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Re: Getting value from session in ModelForm
On Monday, February 7, 2011 8:27:55 PM UTC, SimpleDimple wrote:
>
> I am new to Django and building a school system but am an experienced
> developer otherwise having firm grip over rails, .net, php & java.
>
> I have the following class where on teacher add/edit form, I am trying
> to filter values in class drop down based on school. The value of
> school_id is saved in session but as you can see below pulling value
> from session fails in ModelForm, can someone please guide me on how to
> get the value from session here ?
>
>
> class TeacherForm(ModelForm):
> def __init__(self, *args, **kwargs):
> super(TeacherForm, self).__init__(*args, **kwargs)
> xclass = self.fields['xclass'].widget
>
> choices = []
>
> #school_id = request.session['school_id'] # since this
> fails, I have hard coded the value 2 in line below for now
> school_id = 2
> xclasses = Class.objects.filter(school=school_id)
> for c in xclasses:
> choices.append((c.id,c.name))
> xclass.choices = choices
It's fundamental to Python programming generally - and, I would have
thought, Java and Ruby (although not PHP) - that if you want access to an
object in a scope, you need to pass it into that scope. In order for you to
access request.session within that __init__ method, you'll need to
explicitly make the request object available there, which means passing it
in when you initialise the form.
I usually do it like this:
class MyForm(forms.ModelForm):
def __init__(self, *args, **kwargs):
request = kwargs.pop('request')
super(TeacherForm, self).__init__(*args, **kwargs)
...etc...
now initialise the form in your view:
form = MyForm(request=request)
--
DR.
--
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Getting value from session in ModelForm
I am new to Django and building a school system but am an experienced developer otherwise having firm grip over rails, .net, php & java. I have the following class where on teacher add/edit form, I am trying to filter values in class drop down based on school. The value of school_id is saved in session but as you can see below pulling value from session fails in ModelForm, can someone please guide me on how to get the value from session here ? class TeacherForm(ModelForm): def __init__(self, *args, **kwargs): super(TeacherForm, self).__init__(*args, **kwargs) xclass = self.fields['xclass'].widget choices = [] #school_id = request.session['school_id'] # since this fails, I have hard coded the value 2 in line below for now school_id = 2 xclasses = Class.objects.filter(school=school_id) for c in xclasses: choices.append((c.id,c.name)) xclass.choices = choices -- You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com. To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
