Added form validation

* Asset IDs must be unique
* Asset IDs that are legacy and unchange have no validation applied
* Asset IDs must be alphanumeric
* Values must be >=0
* Lengths, CSAs, Circuits and Cores of cables must all be >0

assets/views.py

@@ -74,7 +74,6 @@ class AssetEdit(LoginRequiredMixin, generic.UpdateView):
 
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
-        context['form'] = forms.AssetForm
         context['edit'] = True
 
         return context