Creating a Marshmallow schema to validate, serialize, and deserialize the model

Now, we will create a simple Marshmallow schema that we will use to validate, serialize, and deserialize the previously declared SurfboardMetricModel model.

Stay in the metrics.py file in the metrics/metrics/models subfolder. Add the following lines to declare SurferStatus Enum and the SurfboardMetricSchema class. The code file for the sample is included in the restful_python_2_09_01 folder, in the Pyramid01/metrics/metrics/models/metrics.py file:

class SurferStatus(Enum): 
    IDLE = 0 
    PADDLING = 1 
    RIDING = 2 
    RIDE_FINISHED = 3 
    WIPED_OUT = 4 
 
 
class SurfboardMetricSchema(Schema): 
    id = fields.Integer(dump_only=True) 
    status = EnumField(SurferStatus, required=True) 
    speed_in_mph = fields.Integer(required=True) 
    altitude_in_feet = fields.Integer(required=True) ...