Now we will create the Flask-Marshmallow schema that we will use to validate, serialize, and deserialize the previously declared User
model. Open the models.py
file within the service
folder and add the following code after the existing lines. The code file for the sample is included in the restful_python_2_03_02
folder, in the Flask01/service/models.py
file:
class UserSchema(ma.Schema): id = fields.Integer(dump_only=True) name = fields.String(required=True, validate=validate.Length(3)) url = ma.URLFor('service.userresource', id='<id>', _external=True)
The code declares the UserSchema
schema, specifically a subclass of the ma.Schema
class. Remember that the previous code we wrote for the service/models.py
file created a flask_marshmallow.Mashmallow
instance named ma
.
We declare the attributes that represent fields as instances of the appropriate class declared in the marshmallow...