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inflection_example.py
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30 lines (19 loc) · 888 Bytes
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from marshmallow import Schema, fields
def camelcase(s):
parts = iter(s.split("_"))
return next(parts) + "".join(i.title() for i in parts)
class CamelCaseSchema(Schema):
"""Schema that uses camel-case for its external representation
and snake-case for its internal representation.
"""
def on_bind_field(self, field_name, field_obj):
field_obj.data_key = camelcase(field_obj.data_key or field_name)
# -----------------------------------------------------------------------------
class UserSchema(CamelCaseSchema):
first_name = fields.Str(required=True)
last_name = fields.Str(required=True)
schema = UserSchema()
loaded = schema.load({"firstName": "David", "lastName": "Bowie"})
print(loaded) # => {'last_name': 'Bowie', 'first_name': 'David'}
dumped = schema.dump(loaded)
print(dumped) # => {'lastName': 'Bowie', 'firstName': 'David'}