added files

src/netbox_slm/fields.py

@@ -0,0 +1,49 @@
+from django.forms import BoundField
+from django.urls import reverse
+
+from utilities.forms import DynamicModelMultipleChoiceField
+
+
+class CustomDynamicModelMultipleChoiceField(DynamicModelMultipleChoiceField):
+    def get_bound_field(self, form, field_name):
+        bound_field = BoundField(form, self, field_name)
+
+        # Set initial value based on prescribed child fields (if not already set)
+        if not self.initial and self.initial_params:
+            filter_kwargs = {}
+            for kwarg, child_field in self.initial_params.items():
+                value = form.initial.get(child_field.lstrip("$"))
+                if value:
+                    filter_kwargs[kwarg] = value
+            if filter_kwargs:
+                self.initial = self.queryset.filter(**filter_kwargs).first()
+
+        # Modify the QuerySet of the field before we return it. Limit choices to any data already bound: Options
+        # will be populated on-demand via the APISelect widget.
+        data = bound_field.value()
+        if data:
+            field_name = getattr(self, "to_field_name") or "pk"
+            filter = self.filter(field_name=field_name)
+            try:
+                self.queryset = filter.filter(self.queryset, data)
+            except (TypeError, ValueError):
+                # Catch any error caused by invalid initial data passed from the user
+                self.queryset = self.queryset.none()
+        else:
+            self.queryset = self.queryset.none()
+
+        # Set the data URL on the APISelect widget (if not already set)
+        widget = bound_field.field.widget
+        if not widget.attrs.get("data-url"):
+            app_label = self.queryset.model._meta.app_label
+            model_name = self.queryset.model._meta.model_name
+
+            #
+            # Custom url for work with plugin api
+            #
+            data_url = reverse(
+                "plugins-api:{}-api:{}-list".format(app_label, model_name)
+            )
+            widget.attrs["data-url"] = data_url
+
+        return bound_field