Support multiple fields in the @validates decorator

[dpriskorn]

Currently the decorator only supports one field. pydantic supports multiple see https://pydantic-docs.helpmanual.io/usage/validators/

e.g.

This makes it easier to specify multiple fields.

[SJLC]

Agree that would be nice to have, but do you know the existing workaround of using @validates_schema decorator to validate multiple fields?

[dpriskorn]

Agree that would be nice to have, but do you know the existing workaround of using @validates_schema decorator to validate multiple fields?

Nope, is an example available somewhere?

[caspii]

Example: I have a schema that has multiple fields for colors:

• background_color
• text_color
• secondary_color

Then I want a validator method that works like this

    @validates("secondary_color")
    @validates("background_color")
    @validates("text_color")
    def validate_color(self, value):
        if not value or len(value) == 0:
            return
        if not value.startswith("#"):
            raise ValidationError("Color must start with #")
        if not all(c.upper() in "0123456789ABCDEF" for c in value[1:]):
            raise ValidationError("Invalid characters in color")
        if len(value) != 9:
            raise ValidationError("Color must be 9 characters long")

I am surprised that this issue is not more active.

[lafrech]

Achieved in #1965.