Python eve method as a default value provider for field

Question

I have a basic schema that I'm messing with to see if eve is a good match for what I need. My question is whether I can set a default value for a field by using a method, also with params would be awesome though I doubt it's possible.

Something like:

from utils import generate_token

...
    'token': {
        'type': 'string',
        'default': generate_token,
        'unique': True,
        'required': True,
    }

Answer 1

With the new release of Cerberus (0.9) I managed to find a hack into this matter and specify 'coerce' which is a callable being applied to the value before the validation takes place so I just went ahead with the following which works as I need it:

'token': {
    'type': 'string',
    'default': None,
    'coerce': generate_token,
    'unique': True,
    'readonly': True
}