Introduce CSVModelForm for dynamic CSV imports

netbox/utilities/forms.py

@@ -712,6 +712,20 @@ class BulkEditForm(forms.Form):
             self.nullable_fields = self.Meta.nullable_fields
 
 
+class CSVModelForm(forms.ModelForm):
+    """
+    ModelForm used for the import of objects in CSV format.
+    """
+    def __init__(self, *args, headers=None, **kwargs):
+        super().__init__(*args, **kwargs)
+
+        # Modify the model form to accommodate any customized to_field_name properties
+        if headers:
+            for field, to_field in headers.items():
+                if to_field is not None:
+                    self.fields[field].to_field_name = to_field
+
+
 class ImportForm(BootstrapMixin, forms.Form):
     """
     Generic form for creating an object from JSON/YAML data

netbox/utilities/views.py

@@ -593,12 +593,7 @@ class BulkImportView(GetReturnURLMixin, View):
                 with transaction.atomic():
                     headers, records = form.cleaned_data['csv']
                     for row, data in enumerate(records, start=1):
-                        obj_form = self.model_form(data)
-
-                        # Modify the model form to accommodate any customized to_field_name properties
-                        for field, to_field in headers.items():
-                            if to_field is not None:
-                                obj_form.fields[field].to_field_name = to_field
+                        obj_form = self.model_form(data, headers=headers)
 
                         if obj_form.is_valid():
                             obj = self._save_obj(obj_form, request)