Override jsonschema property

[asiffer]

Hi, I would like to know how to override/remove some jsonschema property.

In the example below, the MAC attribute is a slice of bytes and is represented as {"type":"string","contentEncoding":"base64"} in the generated schema. However, in my case I made a custom marshaller so as to turn this slice into a string. So I would like to remove the contentEncoding attribute in the schema.

I have tried to change its value but it is not reflected in the schema.

package main

import (
	"encoding/json"
	"fmt"
	"net"

	"github.com/invopop/jsonschema"
)

type NIC struct {
	Name string           `json:"name,omitempty"`
	MAC  net.HardwareAddr `json:"mac,omitempty" jsonschema:"contentEncoding=quoted-printable"`
}

func (nic *NIC) MarshalJSON() ([]byte, error) {
	type Alias NIC

	mac := ""
	if nic.MAC != nil {
		mac = nic.MAC.String()
	}

	return json.Marshal(&struct {
		MAC string `json:"mac,omitempty"`
		*Alias
	}{
		MAC:   mac,
		Alias: (*Alias)(nic),
	})
}

func main() {
	schema := jsonschema.Reflect(&NIC{})
	data, _ := schema.MarshalJSON()
	fmt.Println(string(data))
}

# output
{"$schema":"https://json-schema.org/draft/2020-12/schema","$ref":"#/$defs/NIC","$defs":{"HardwareAddr":{"type":"string","contentEncoding":"base64"},"NIC":{"properties":{"name":{"type":"string"},"mac":{"$ref":"#/$defs/HardwareAddr"}},"additionalProperties":false,"type":"object"}}}