Drop-down dependency using Django and Python -

im still new in using django , python.. working on drop-down dependency in hwname , hwtype. tried many codes didn't worked.. here codes. please me :)

what want happen example in hwtype have flexi , flexi2, in hwname have female , male .. if choose flexi in hwtype, "female" display in hwname , if choose flexi2, hwname display "male" ..

models.py (codes)

class hwname(models.model):     hwnid = models.autofield(max_length=6, primary_key=true, db_column='id')     hwnname = models.charfield(max_length=255, db_column='name')      class meta:         db_table=u'hw_name'     def __unicode__(self):         return unicode((self.hwnname))   class hwtype(models.model):     hwtid = models.autofield(max_length=6, primary_key=true, db_column='id')     hwtname = models.charfield(max_length=255, db_column='name')      class meta:         db_table=u'hw_type'     def __unicode__(self):         return unicode((self.hwtname)) 

scbt inventory(advance search)

class inventory (models.model):     id = models.autofield(max_length=6, primary_key=true, db_column='id')     hwname = models.foreignkey(hwname, db_column='hw_name', default=1)     hwtype = models.foreignkey(hwtype, db_column='hw_type', default=1)      class meta:         db_table=u'inventory'     def __unicode__ (self):         return unicode((self.assetnumber, self.serialnumber, self.hwname, self.hwtype)) 

advanced search hardware form

class advancedsearchform (modelform):     hwname = forms.modelchoicefield(queryset=hwname.objects.all(), label="hardware name")     hwtype = forms.modelchoicefield(queryset=hwtype.objects.all(), label="hardware type")      class meta:         model = inventory         exclude = ('id', 'assetnumber', 'serialnumber', 'remarks') 

views.py (codes)

def inventory (request):      ##advanced search form:##     form = advancedsearchform(request.post or none)          ##check if form not empty##       hwname = request.get.get('hwname', 0)     hwtype = request.get.get('hwtype',0)      if hwname == 'none':         hwname = ''     if hwtype == 'none':         hwtype = '' 

---

try "django-smart-selects"
looks need
https://github.com/digi604/django-smart-selects