id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
9769	ManyToManyField Widget: saving object does not work	sindrero	nobody	"In our application, we are unable to save a ManyToManyField, using the standard webform widgit. MultipleSelectChecbox also does not work. The scalar_properties, remain an empty list when objects are added through the webform. All other fields are properly saved.

When examining the ''request.POST'' object, I se that a numeric value is returned. However request.POST includes only ONE numeric value, when it SHOULD have returned several. The number returned, is always equal to the numbering of the last selected element in the list. (The last element in the list is named 1, the second last is named 2 an so on.) There seems to be no way of extracting all objects that are actually selected out from the returned number.

Example code (simplification of our aplication):

in models.py, we have somthing like:
{{{
...
class Calculation(models.Model):
    ...
    scalar_properties = fields.ManyToManyField(""ScalarProperty"")
    ...

class ScalarProperty(models.Model)
    ...

}}}

in views.py we have:
{{{
def edit(request, ...):
    instance = ... # The original object, before editing
    if request.POST.method == ""GET"":
        # Create form:
        ....
    elif request.POST.method == ""POST"":
        # Save object from form:
        calc = forms.CalculationForm(request.POST, instance=instance).save(commit=False) 
        ...
        calc.save()
    # Redirect:
    ...

...
}}}
"		closed	Uncategorized	dev		invalid			Unreviewed	0	0	0	0	0	0