Damien/arista-evpn-vxlan-clab
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fix: use Jinja2 none instead of null and add defensive checks for optional relationships (#20)

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Replace all `null` literals with `none` (valid Jinja2/Python) in all three
templates. Add explicit `is defined and is not none and .node is not none`
guards before accessing nested nodes on optional GraphQL relationships, to
avoid `Undefined is not JSON serializable` errors at render time.

Also add `| default(none)` on optional scalar attributes (speed, mode,
lacp_mode, mlag_id, mtu, description, virtual_router_address,
route_distinguisher, learn_restrict, vlan_type, trunk_groups) so that
Infrahub `Undefined` values from unset optional fields are safely coerced
to JSON null rather than crashing tojson serialization.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Damien
2026-02-28 17:41:19 +01:00
parent 584a4ad5a4
commit a415de85bd
3 changed files with 45 additions and 45 deletions
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30
transforms/templates/vxlan_yang.j2
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@@ -10,8 +10,8 @@
{#— Build VTEP section (there is one VTEP per device) —#}
{%- if vtep_edges | length > 0 -%}
{%- set vtep = vtep_edges[0].node -%}
{%- set source_iface = null -%}
{%- if vtep.source_interface and vtep.source_interface.node -%}
{%- set source_iface = none -%}
{%- if vtep.source_interface is defined and vtep.source_interface is not none and vtep.source_interface.node is not none -%}
{%- set source_iface = vtep.source_interface.node.name.value -%}
{%- endif -%}
@@ -19,15 +19,15 @@
{%- set vlan_vni_list = [] -%}
{%- for mapping_edge in vtep.vlan_vni_mappings.edges -%}
{%- set m = mapping_edge.node -%}
{%- set vlan_id = null -%}
{%- set vlan_name = null -%}
{%- if m.vlan and m.vlan.node -%}
{%- set vlan_id = none -%}
{%- set vlan_name = none -%}
{%- if m.vlan is defined and m.vlan is not none and m.vlan.node is not none -%}
{%- set vlan_id = m.vlan.node.vlan_id.value -%}
{%- set vlan_name = m.vlan.node.name.value -%}
{%- endif -%}
{%- set vni_val = null -%}
{%- set vni_type_val = null -%}
{%- if m.vni and m.vni.node -%}
{%- set vni_val = none -%}
{%- set vni_type_val = none -%}
{%- if m.vni is defined and m.vni is not none and m.vni.node is not none -%}
{%- set vni_val = m.vni.node.vni.value -%}
{%- set vni_type_val = m.vni.node.vni_type.value -%}
{%- endif -%}
@@ -43,14 +43,14 @@
{%- set vrf_vni_list = [] -%}
{%- for vrf_edge in vrf_edges -%}
{%- set assignment = vrf_edge.node -%}
{%- set vrf_name = null -%}
{%- set l3vni = null -%}
{%- set vrf_name = none -%}
{%- set l3vni = none -%}
{%- set import_rts = [] -%}
{%- set export_rts = [] -%}
{%- if assignment.vrf and assignment.vrf.node -%}
{%- if assignment.vrf is defined and assignment.vrf is not none and assignment.vrf.node is not none -%}
{%- set vrf_node = assignment.vrf.node -%}
{%- set vrf_name = vrf_node.name.value -%}
{%- if vrf_node.l3vni and vrf_node.l3vni.node -%}
{%- if vrf_node.l3vni is defined and vrf_node.l3vni is not none and vrf_node.l3vni.node is not none -%}
{%- set l3vni = vrf_node.l3vni.node.vni.value -%}
{%- endif -%}
{%- for rt_edge in vrf_node.import_targets.edges -%}
@@ -63,7 +63,7 @@
{%- set _ = vrf_vni_list.append({
"vrf": vrf_name,
"l3vni": l3vni,
"route_distinguisher": assignment.route_distinguisher.value,
"route_distinguisher": assignment.route_distinguisher.value | default(none),
"import_targets": import_rts,
"export_targets": export_rts
}) -%}
@@ -74,14 +74,14 @@
"source_address": vtep.source_address.value,
"source_interface": source_iface,
"udp_port": vtep.udp_port.value,
"learn_restrict": vtep.learn_restrict.value,
"learn_restrict": vtep.learn_restrict.value | default(none),
"vlan_vni_mappings": vlan_vni_list | sort(attribute='vlan_id'),
"vrf_vni_mappings": vrf_vni_list
}
} -%}
{%- else -%}
{%- set result = {
"vtep": null,
"vtep": none,
"vrf_vni_mappings": []
} -%}
{%- endif -%}