GraphQL: Support for filtering on custom fields

[emil-nasso]

NetBox version

v3.0.3

Feature type

New functionality

Proposed functionality

There doesn't seem to be a way to filter based on custom fields in the GraphQL-api.

The documentation mentions "The GraphQL API employs the same filtering logic as the UI and REST API" so one approach would be to just follow the same pattern where cf_foo_bar etc are exposed as arguments for the list query of an entity where foo_bar is a custom field.

(Reference to discussion about this: #7569 )

Use case

We have the use for this when listing tenants via the graphql API. We put the customers name in the name field but we have a custom field where we have an internal identifier that is used as a reference when linking the data in netbox up with other systems though integrations.

Database changes

No response

External dependencies

No response

[candlerb]

Another way might be via a graphql query on custom_fields. I note that you can ask for custom_fields in a response:

# curl -sS -X GET -H "Content-Type: application/json" -H "Accept: application/json" http://localhost:8001/graphql/ \
  --data '{"query": "query {device_list(id:\"5\") {id custom_fields}}"}' | python3 -m json.tool
{
    "data": {
        "device_list": [
            {
                "id": "5",
                "custom_fields": {
                    "snmp_module": [
                        "mikrotik_secret"
                    ]
                }
            }
        ]
    }
}

(There's also custom_field_data which returns a string holding JSON). But as far as I can tell, you can't currently filter on custom_fields in a query:

# curl -sS -X GET -H "Content-Type: application/json" -H "Accept: application/json" http://localhost:8001/graphql/ \
  --data '{"query": "query {device_list(custom_fields:{snmp_module:\"mikrotik_secret\"}) {id custom_fields}}"}' | python3 -m json.tool
{
    "errors": [
        {
            "message": "Unknown argument \"custom_fields\" on field \"device_list\" of type \"Query\".",
            "locations": [
                {
                    "line": 1,
                    "column": 20
                }
            ]
        }
    ]
}

It would of course be good if such a query could be pushed down to a SQL condition in postgres, rather than making Netbox retrieve all objects from the database and discard the ones which don't match.

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[jeremystretch]

Blocked by #9856

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[arthanson]

Blocked on #11949

[arthanson]

Adding blocked until #9856

[sirtux]

@arthanson Since #9856 is done, can you unblock this issue? Any ideas if and when this is now going to happen?

[jeremystretch]

I've marked this as "needs owner" for anyone who would like to take a stab at implementing this for v4.0 (with the new Strawberry GraphQL backend). @arthanson anything in particular you'd like to point out for this?