Webhook Jinja Templating Custom Fields

[aascedu]

Hello,

I want to use Jinja templating in the webhook body.
I have a webook set to trigger when a VLAN object is created. I also have a custom field for Tenant objects called TenantID.
The webhook communicates with my ERP and I have successfully created a vlan in my ERP when I write this TenantID with a default static value lets say 123.

However each and every VLANs could be for different Tenants, so I need to fetch TenantID for the tenant of the vlan created.
Here is a view from the API (URL/api/ipam/vlans/) :

{
            "id": 25,
            "url": "URL/api/ipam/vlans/25/",
            "display_url": "URL/ipam/vlans/25/",
            "display": "Data (1)",
            "site": {
                "id": 116,
                "url": "URL/api/dcim/sites/116/",
                "display": "Aix",
                "name": "Aix",
                "slug": "Aix",
                "description": ""
            },
            "group": {
                "id": 24,
                "url": "URL/api/ipam/vlan-groups/24/",
                "display": "APAJH 38-Aix-Vlans",
                "name": "APAJH 38-Aix-Vlans",
                "slug": "apajh-38-aix-vlans",
                "description": ""
            },
            "vid": 1,
            "name": "Data",
            "tenant": {
                "id": 1,
                "url": "URL/api/tenancy/tenants/1/",
                "display": "APAJH 38",
                "name": "APAJH 38",
                "slug": "apajh-38",
                "description": ""
            },
            "status": {
                "value": "active",
                "label": "Active"
            },
            "role": null,
            "description": "",
            "comments": "",
            "l2vpn_termination": null,
            "tags": [],
            "custom_fields": {},
            "created": "2024-11-12T10:35:04.597269Z",
            "last_updated": "2024-11-12T10:35:04.597289Z",
            "prefix_count": 1
        },

As you can see there is no field "custom_fields" in the tenant dict...
Would I be able to get it with Jinja2 templating ?
With netbox shell I can do that : vlan.tenant.custom_field_data.get('TenantID') and it returns the value.

Thanks so much for any solutions provided !