Python Marshmallow - Customize Formatting Of Class Member

I have Marshmallow serializer written as class TestSchema(Schema): created_date = fields.Str(required=False) class Test(database.Model): created_date = database.Colum

Solution 1:

Use fields.DateTime marshmallow field for SQLAlchemy datetime object instead of fields.Str. In fact, iso format is default format, but you can specify other in format parameter. Docs: here