When the delete checkbox is checked, the LayerMapOptions instance is not deleted when the form is submitted. Otherwise the form is working perfectly for all other fields. Is there something special to do in the form for through model?
model:
class EzMap(models.Model):
map_name = models.SlugField(max_length=50)
layers = models.ManyToManyField(Shapefile, through='LayerMapOptions', verbose_name='Layers to display', null=True, blank=True)
class Shapefile(models.Model):
filename = models.CharField(max_length=255)
class LayerMapOptions(models.Model):
layer = models.ForeignKey(Shapefile)
ezmap = models.ForeignKey(EzMap)
position = models.IntegerField(max_length=100)
visible = models.BooleanField()
view:
def setMapOptions(request, map_name):
map_selected = EzMap.objects.get(map_name=map_name, created_by=request.user)
layers_ordered = LayerMapOptions.objects.filter(ezmap=map_selected).order_by('position')
layerForm = modelformset_factory(LayerMapOptions, form=LayerMapOptionsForm, extra=0, can_delete=True)
if request.POST:
formset = layerForm(request.POST, queryset=layers_ordered)
pk_list = request.POST.get("layersOrder")
if formset.is_valid():
for form in formset:
instance = form.instance
instance.position = pk_list.index(instance.pk)
instance.save()
save_link = u"/ezmapping/map/%s" % (map_name)
return HttpResponseRedirect(save_link)
else:
formset = layerForm(queryset=layers_ordered)
return render_to_response("ezmapping/manage_map_Options.html", {'formset': formset}, context_instance=RequestContext(request))
form:
class LayerMapOptionsForm(ModelForm):
link = forms.CharField(label='link', required=False)
def __init__(self, *args, **kwargs):
super(LayerMapOptionsForm, self).__init__(*args, **kwargs)
self.fields['link'].widget = ModelLinkWidget(self.instance.layer)
class Meta:
model = LayerMapOptions
fields = ['link', 'visible']