custom validation: how to call validate()

[waleedashraf]

custom validation: how to call validate()

[nospam2000]

I think I found a solution by calling validator._ajv.compile() myself:

    let dt = dpMeta.dataType;
    let schemaDt = validator.schema.components.schemas.dpDataTypeV1.oneOf.find(element => element.const == dt);
    const vali = validator._ajv.compile(schemaDt["x-dpDataType"]);
    const result = vali(val.val);
    if (!result) {
      console.log(`Error: value "${val.val}" doesn't match type ${dt}`);
    }

[WaleedAshraf]

If I understood your problem correctly, the dpDataType_Bool is a message, then you should have it defined in your schema as a message.
It should have a topic (channel) and operation.

Something like this:

channels:
  data-types:
    description: data-types messages
    publish:
      message:
        name: dpDataType_Bool
        payload:
          oneOf:
            - type: boolean
            - type: integer
              minimum: 0
              maximum: 1
            - type: string
              oneOf:
                - const: 'true'
                - const: 'false'
                - const: '0'
                - const: '1'

va.validate('dpDataType_Bool', message, 'data-types', 'publish')

[nospam2000]

the part

      anyOf:
        - type: integer
        - type: number
        - type: string
        -...

is a variant value and only one little part of the value message. The value message can contain thousands of that variant value.

Another metadata message contains the definition which of the variant values of the value message has which concrete type. e.g. the anyof value 'Bool' in the metadata message uses x-dpDataType to reference dpDataType_Bool which means dpDataType_Bool needs to be used to validate the variant of the value message.

The point is just that I need to be able to verify one single schema part against a value and not a whole message, because the rest of the message is already validated. For a whole validation of the value message additional external information from the metadata message is needed which contains the datatype definition.

This seems to work with the lines I posted above.

When I'm back at work next year I can post a more exhaustive example, but the schema file alone without the validation script is around 900 lines long.

Thanks a lot for your validator, it is a big benefit for me!

[nospam2000]

the solution is already contained in the answers above

[WaleedAshraf]

Glad you found the solution 👍 . Thanks for the feedback.