django - Using radio button control to select foreign key pointing to an item in nested inline formset -

i have following classes defined define node class. each node can have multiple nodeintf's assigned it. each nodeintf can have multiple nodeintfipaddr's assigned it. 1 of nodeintfipaddr's maybe assigned mgmt_ipaddr attribute on node object. , 1 of them maybe assigned mgmt_ipaddr_v6 attribute. in template, have nested table interfaces , want use radio button selector choose of ipaddrs selected mgmt_ipaddr(_v6) attributes on node object, i'm not quite sure how it. think that, iterate on ipaddr_formset, have check see if ipaddr represents selected mgmt_ipaddr, i'm not sure how that. appreciated.

class node(models.model):     name = models.charfield(max_length=64, primary_key=true)     mgmt_ipaddr = models.foreignkey('nodeintfipaddr', null=true, on_delete=models.set_null)     mgmt_ipaddr_v6 = models.foreignkey('nodeintfipaddr', null=true, on_delete=models.set_null)  class nodeintf(models.model):     intf = models.charfield(max_length=32)     node = models.foreignkey('node', on_delete=models.cascade)     class meta:         unique_together = ('node', 'intf')  class nodeintfipaddr(models.model):    node_intf = models.foreignkey('nodeintf', on_delete=models.cascade)    ipaddr = inetaddressfield()    class meta:        unique_together = ('node_intf', 'ipaddr')  class nodeform(modelform):     class meta:         model = node  class nodeintfform(modelform):     class meta:         model = nodeintf  class nodeintfipaddrform(modelform):     class meta:         model = nodeintfipaddr  nodeintfipaddrformset = modelformset_factory(nodeintfipaddr,     form=nodeintfipaddrform, extra=0)  class basenodeintfformset(baseinlineformset):     def add_fields(self, form, index):         super(basenodeintfformset, self).add_fields(form, index)         instance = self.get_queryset()[index]         pk_value = instance.pk         form.ipaddr_formset = nodeintfipaddrformset(             queryset=nodeintfipaddr.objects.filter(node_intf=pk_value),             prefix='intf_%s' % pk_value)  nodeintfformset = inlineformset_factory(node, nodeintf,     form=nodeintfform, formset=basenodeintfformset, extra=0)  class nodeupdateview(updateview):     form_class = nodeform     model = node     def get_context_data(self, **kwargs):         c = super(nodeupdateview, self).get_context_data(**kwargs)         node = self.get_object()         c['action'] = reverse('node-update', kwargs={'pk': node.name})         if self.request.post:             node_intfs = nodeintfformset(self.request.post, instance=node)             if node_intfs.is_valid():                 addrs = node_intfs.save_all()         else:             node_intfs = nodeintfformset(instance=node)         c['node_intfs_formset'] = node_intfs         return c 

template snippet:

  <table class='node_intfs'>       <thead>         <tr class='node_intf'>           <th colspan='2'></th>           <th>name</th>           <th></th>         </tr>         <tr class='node_intf_ipaddr'>           <th>ipv4 mgmt<br><label><input type='radio' name='mgmt_ipaddr' value=''{{ node.mgmt_ipaddr|yesno:', checked' }}>none</label></th>           <th>ipv6 mgmt<br><label><input type='radio' name='mgmt_ipaddr_v6' value=''{{ node.mgmt_ipaddr_v6|yesno:', checked' }}>none</label></th>           <th colspan='2'></th>         </tr>       </thead>       <tbody> {% node_intf_form in node_intfs_formset %}         <tr class='node_intf'>           <td colspan='2'></td>           <td>{{ node_intf_form.intf }}</td>           <td></td>         </tr> {% if node_intf_form.ipaddr_formset %} {% ipaddr_form in node_intf_form.ipaddr_formset %}         <tr class='node_intf_ipaddr'>           <td>todo</td>                                  <---- these can't figure out           <td>todo</td>                                  <---- these can't figure out           <td></td>           <td>{{ ipaddr_form.ipaddr }}</td>         </tr> {% endfor %} {% endif %} {% endfor %}       </tbody>     </table> 

i able needed using following in template:

<td class='center'><input type='radio' name='mgmt_ipaddr' value='{{ ipaddr_form.instance.id }}'{% if node.mgmt_ipaddr_id == ipaddr_form.instance.id %} checked='checked'{% endif %}</td> <td class='center'><input type='radio' name='mgmt_ipaddr_v6' value='{{ ipaddr_form.instance.id }}'{% if node.mgmt_ipaddr_v6_id == ipaddr_form.instance.id %} checked='checked'{% endif %}</td> 

this compares mgmt_ipaddr(_v6)_id node object id of instance tied individual ipaddr forms, accessible ipaddr_form.instance.id.

just completeness, missing management_form each of node_intf_forms , ipaddr_forms.