Question

this is my forms.py

CHOICES = []
class salDeptChartForm(forms.Form):
    company = forms.CharField(max_length=2,label = 'Firma',help_text='A valid email address, please.')
    date_validfrom = forms.DateField(label = 'Bu Tarihten',required=False)
    date_validuntil = forms.DateField(label = 'Bu Tarihe Kadar',required=False)
    saldept = forms.MultipleChoiceField(label = 'Satış Departmanları',choices=CHOICES,    widget=forms.CheckboxSelectMultiple())

this is where I override the choices in my view.

    form = salDeptChartForm(initial={'company':'01'})
    saldeptlist = saleinstance.fetchSalDept()
    form.fields['saldept'].choices = saldeptlist <this is where I override>

problem occurs when I select one of the options. form doesnt get validate.

Select a valid choice. * is not one of the available choices.

I think, even I override the choices in my view django still checks with previous choices itially I created. I get the correct html output tough.

How to overcome this?
thx

complete view code is there.
form initiates twice one for get and one for post, I dont know if its best either.

def salDept(request):
    member_id = request.session['member_id']
    saleinstance = sale(member_id)
    chartinstance = charts(member_id)
    if request.method == 'GET':
        form = salDeptChartForm(initial={'company':'01'})  <first init>
        saldeptlist = saleinstance.fetchSalDept()  <its a list>
        form.fields['saldept'].choices = saldeptlist  <override choices>
        print 'get worked'
        return render(request, 'chart/sale/salDept.html',locals())
    if request.method == 'POST':
        form = salDeptChartForm(request.POST) <second init>
        print 'post worked'
        if form.is_valid(): <fails>
            print 'valid'
            company = form.cleaned_data['company']
            vfr = form.cleaned_data['date_validfrom']
            vun = form.cleaned_data['date_validuntil']
            validfrom = formatDate(vfr)
            validuntil = formatDate(vun)
            selectedSalDepts = request.POST.getlist('saldept')
        else:
            print 'not valid'
            print form.errors
        resultdict = chartinstance.salesBySaldept(company,selectedSalDepts,validfrom, validuntil)
        form = salDeptChartForm(initial={'company':company,'date_validfrom':request.POST['date_validfrom'], 'date_validuntil':request.POST['date_validuntil']})
        domcache = 'true'
        return render(request, 'chart/sale/salDept.html',locals())

Answer 1

Your validation fails because you only overwrite the choices on the GET method. You don’t do anything for the POST, so as far as Django knows, no choice is valid for the POST. Adding the choices to POST should fix your problem.