4.0.0 Breaking change, because CI jobs right now relies on the generated message pattern.

ValidationError messages are currently defined from a fixed pattern and a bit confusing.

• "field must ne x but is is x"
• "field must is_type_of but it is x"
• "field must not_in [1,2,3] but it is 1"

Messages are "ok" but not very descriptive, currently users have a way to set better messages.

Validator("name", eq=3, messages={"operations": "{name} has value {value} which is incorrect for {operation}({op_value}) !"})

I want to improve those messages, I dont have ideas right now on how to implement but I want more natural messages like:

• "ValidationError: name must not be equal to x"
• "ValidationError: invalid type 'int' for field 'name: str'

Also, ValidationError should expose only the data from Validator such as operations, op_value, env but never print out the current value of the settings.

On Schema

pizza_topping: Annotated[str, Ne("pineapple", msg="We dont respect pineapple on Pizza!")]