python - Making readonly for existing field but allowing to add when new inline is created in django admin -

i have 2 models 1 of them inline other. have made fields of inline model read only.

class followupinline(admin.tabularinline): model = md.followup = 0 can_delete = false  def get_readonly_fields(self, request, obj=none):     if request.user.is_superuser == false:                   if obj: # editing existing object                 return self.readonly_fields + (                 'follow_up_date',                 'status_inquiry',                 'remarks',                 'followup_done_by',                 )     return self.readonly_fields 

however not allows add new fields when "add another" clicked in inline rather changes them label value "none". how can make fields inline add when next inline added?

i found answer this. need insert construct form , call form inline class have done shown below:

class requiredinlineformset(baseinlineformset): """ generates inline formset required """     def _construct_form(self, i, **kwargs):     """     override method change form attribute empty_permitted     """         form = super(requiredinlineformset, self)._construct_form(i, **kwargs)         form.empty_permitted = false         return form  class followupaddinline(admin.tabularinline):     model = md.followup     = 1     formfield_overrides = {     models.charfield: {'widget': textinput(attrs={'size':'20'})},     models.textfield: {'widget': textarea(attrs={'rows':4, 'cols':40})}, }      can_delete = false     formset = requiredinlineformset      def has_change_permission(self, request, obj=none):         return false  class followuplistinline(admin.tabularinline):     model = md.followup     readonly_fields = ('status', 'follow_up_date', 'followup_status', 'followup_reason', 'remarks', 'followup_done_by')     = 0     can_delete = false     formset = requiredinlineformset      def has_add_permission(self, request):         return false  class followupadmininline(admin.tabularinline):     model = md.followup     = 1     formfield_overrides = {     models.charfield: {'widget': textinput(attrs={'size':'20'})},     models.textfield: {'widget': textarea(attrs={'rows':4, 'cols':40})}, }      formset = requiredinlineformset      def queryset(self, request):         return md.followup.objects.filter(owner=request.user)  class packageadmin(admin.modeladmin): """makes followup added along package"""     inlines =(followuplistinline, followupaddinline)     fields = ('date_of_inquiry', 'agent_name', 'type_of_booking',                   'no_of_pax', 'source_of_inquiry', 'business_vendor',               'travel_date', 'reply_date', 'client_name',               'client_email', 'client_contacts', 'inquiry_assigned_to',               'inquiry_assigned_by')     list_display = ('agent_name', 'date_of_inquiry','status_color')     list_filter = ('date_of_inquiry',)     can_delete = false     list_per_page = 25      def get_readonly_fields(self, request, obj=none):     if request.user.is_superuser == false:         if obj: # editing existing object             return self.readonly_fields + (                         'agent_name',                         'date_of_inquiry',                          )          else:             self.inlines = (followupadmininline,)            return self.readonly_fields      def queryset(self, request): """limit pages belong request's user."""         qs = super(packageadmin, self).queryset(request)         if request.user.is_superuser:            return qs         return qs.filter(inquiry_assigned_to=request.user)  admin.site.register(md.package,packageadmin)