Marshmallow: ValidationError does not get raised when None is loaded (Marshmallow 2.LatestX)

[efake2002]

Hi, I am not sure if this is a bug or intended behavior but here I go... So, currently I am using the latest version Marshmallow 2 (Sidenote: Do you guys recommend using the latest 3.X release candidate instead? I'm trying to use the latest stable version so decided to go with 2...) I have the following schema:

class SimpleSchema(Schema):
    my_field = String(required=True)

When I load data into the schema, if i do SimpleSchema().load({}), it obviously fails and raises a ValidationError (Yes, I am using strict=True in the Meta class) because my_field is undefined. However, if I pass SimpleSchema().load(None), it says ok and it works (raises no errors) even though required fields are not defined.

Is this some sort of bug or am I doing something wrong here? It certainly seems like weird behavior that may need to be fixed. Would love some feedback. Thanks for the great library and your precious time!

[lafrech]

This is fixed in marshmallow 3 (https://github.com/marshmallow-code/marshmallow/pull/725).

We kept the "wrong" behaviour in marshmallow 2 as people may be relying on it.

If you're starting a development, I'd recommend using marshmallow 3 even if it is still in RC. Don't expect too many changes... but be aware some may occur.

[efake2002]

@lafrech Thanks a lot mate, will go with Marsh 3 then. G'day!