Can we customise the schema validation error message

[yasassri]

Can we do something like the below?

"service_name": {
			"type": "string",
			"pattern": "^([0-9A-Za-z]+[-_\\s]?[0-9A-Za-z]+)+$"
                          **"errorMessage": "The service name is not valid. Take a step back."**
		},

[Relequestual]

This is a duplicate of #62
that was revived as #396
and resolved for draft 2019-09 (aka "draft 8").

You can use the output result of a failed validation process (which contains the keywords locations) to then access the error message in your schema.

You will need to determine which subschema is applicable to your situation if multiple subschemas fail.