What would be a good way to add custom Pydantic validators to the generated model?

[Iddodo]

First I want to start with a big thank you to the community for creating such a great package. It's been helping us a lot.

It would be nice to be able to add custom Pydantic validators to some of the classes that require non-trivial validation logic.

This would be helpful as the model is then consumed by FastAPI, which would run these validators during de-serialization.

While I understand this is probably not currently supported (unless I missed something), I was wondering if there was some way I could customize the codegen step such that these Pydantic validators can be added directly.

[goschtl]

Hi,

i have something similar. We have jsonschemas which do something like this:

...
   },
    "lastName": {
      "type": "string",
      "description": "The person's last name."
    },
    "age": {
      "description": "Age in years which must be equal to or greater than zero.",
      "type": "integer",
      "minimum": 0
    }
  },
  "allOf": [
    {
      "if": {
        "properties": {
          "lastName": { "const": "Doe" }
        }
      },
      "then": {
        "required": ["age"]
      }
    }
  ]
}

Do you have something like this in mind.

christian