Validating against enum

[peterkronenberg]

Is there a way to validate an argument to ensure that it has only a list of specific values?

For example

func(
          suit = Json(hearts | clubs | spades | diamonds)
):

Or maybe validate against an existing Python enum

[smt5541]

Currently, the best way to do this is the func parameter passed to the decorator, but I can see type hints being used for ensuring a value is in the enum to make that smoother.

[peterkronenberg]

Where are the type hints documented? I don't recall seeing anything about arguments to the decorator

[smt5541]

Sorry, I misspoke - there are parameters that can be passed to the decorator, but those are to customize error handling. I meant to say the func parameter of Parameter's subclasses.

Currently in the midst of fleshing out and updating documentation in #45 , so that may help as well.

[peterkronenberg]

Ah, I see. An example of usage would be great. I'll keep on eye on the docs. Looks good so far.

[smt5541]

An existing example would be in the unit tests:

flask-parameter-validation/flask_parameter_validation/test/testing_blueprints/str_blueprint.py

Line 74 in 7b99414

def is_digit(v):

In addition to what's shown in that example, you can return a custom error message by returning a tuple of (valid: bool, error_message: str) instead of a single bool