Fixes #2940: Allow CSV import of prefixes/IPs to VRF without an RD assigned

CHANGELOG.md

@@ -12,6 +12,7 @@ v2.5.8 (FUTURE)
 * [#2923](https://github.com/digitalocean/netbox/issues/2923) - Provider filter form's site field should be blank by default
 * [#2938](https://github.com/digitalocean/netbox/issues/2938) - Enforce deterministic ordering of device components returned by API
 * [#2939](https://github.com/digitalocean/netbox/issues/2939) - Exclude circuit terminations from API interface connections endpoint
+* [#2940](https://github.com/digitalocean/netbox/issues/2940) - Allow CSV import of prefixes/IPs to VRF without an RD assigned
 * [#2944](https://github.com/digitalocean/netbox/issues/2944) - Record the deletion of an IP address in the changelog of its parent interface (if any)
 * [#2952](https://github.com/digitalocean/netbox/issues/2952) - Added the `slug` field to the Tenant filter for use in the API and search function
 * [#2954](https://github.com/digitalocean/netbox/issues/2954) - Remove trailing slashes to fix root/template paths on Windows

netbox/ipam/forms.py

@@ -349,11 +349,11 @@ class PrefixForm(BootstrapMixin, TenancyForm, CustomFieldForm):
 
 
 class PrefixCSVForm(forms.ModelForm):
-    vrf = forms.ModelChoiceField(
+    vrf = FlexibleModelChoiceField(
         queryset=VRF.objects.all(),
-        required=False,
         to_field_name='rd',
-        help_text='Route distinguisher of parent VRF',
+        required=False,
+        help_text='Route distinguisher of parent VRF (or {ID})',
         error_messages={
             'invalid_choice': 'VRF not found.',
         }
@@ -764,11 +764,11 @@ class IPAddressBulkAddForm(BootstrapMixin, TenancyForm, CustomFieldForm):
 
 
 class IPAddressCSVForm(forms.ModelForm):
-    vrf = forms.ModelChoiceField(
+    vrf = FlexibleModelChoiceField(
         queryset=VRF.objects.all(),
-        required=False,
         to_field_name='rd',
-        help_text='Route distinguisher of the assigned VRF',
+        required=False,
+        help_text='Route distinguisher of parent VRF (or {ID})',
         error_messages={
             'invalid_choice': 'VRF not found.',
         }