use marshmallow to load json

requirements.txt

@@ -10,3 +10,5 @@ xeger
 pika
 psycopg2-binary
 marshmallow
+marshmallow-sqlalchemy
+flask-marshmallow

src/app.py

@@ -8,6 +8,7 @@ from sentry_sdk.integrations.flask import FlaskIntegration
 import rabbitmqqueue
 from config import *
 from db import db
+from marshm import ma
 from resources import SampleResource, SampleParameterResource
 
 """
@@ -33,6 +34,7 @@ app = Flask(__name__)
 app.config['SQLALCHEMY_DATABASE_URI'] = f"postgresql://{POSTGRES_USERNAME}:{POSTGRES_PASSWORD}@{POSTGRES_HOSTNAME}:5432/{POSTGRES_DB}"
 api = Api(app)
 db.init_app(app)
+ma.init_app(app)
 
 with app.app_context():
     db.create_all()

src/marshm.py

@@ -0,0 +1,14 @@
+#!/usr/bin/env python3
+
+from flask_marshmallow import Marshmallow
+
+"""
+Marshmallow
+"""
+
+__author__ = '@tormakris'
+__copyright__ = "Copyright 2020, Birbnetes Team"
+__module_name__ = "marshm"
+__version__text__ = "1"
+
+ma = Marshmallow()

src/resources.py

@@ -8,7 +8,7 @@ import requests
 from db import db
 from models import SampleMetadata
 from rabbitmqqueue import rabbitmq_channel
-from schemas import SampleSchema
+from schemas import SampleSchema, SampleMetadataSchema
 from config import *
 
 """
@@ -29,6 +29,9 @@ class SampleResource(Resource):
     See: https://swagger.kmlabz.com/?urls.primaryName=Input%20Service
     """
 
+    sampleschema = SampleSchema(many=False)
+    samplemetadataschema = SampleMetadataSchema(many=True)
+
     def post(self):
         """
         Post request send to the endpoint
@@ -50,15 +53,9 @@ class SampleResource(Resource):
             return {'err_msg': 'Input file not a wave file.'}, 415
 
         try:
-            desc = json.loads(description)
+            desc = self.sampleschema.loads(description)
         except Exception as e:
             LOGGER.exception(e)
-            return {'err_msg': 'Input JSON could not be parsed'}, 400
-
-        validate_errors = SampleSchema().validate(desc)
-        if validate_errors:
-            LOGGER.error(
-                "Input JSON did not conform to schema. It was: {}".format(desc))
             return {'err_msg': 'Input JSON schema invalid'}, 417
 
         xeger = Xeger(limit=30)
@@ -97,7 +94,7 @@ class SampleResource(Resource):
         :return:
         """
         samples = SampleMetadata.query.all()
-        return list(samples), 200
+        return self.samplemetadataschema.dumps(list(samples)), 200
 
 
 class SampleParameterResource(Resource):
@@ -105,6 +102,8 @@ class SampleParameterResource(Resource):
     Sample endpoint with parameters
     """
 
+    samplemetadataschema = SampleMetadataSchema(many=False)
+
     def get(self, tag: str):
         """
         Get a specific item
@@ -112,4 +111,4 @@ class SampleParameterResource(Resource):
         :return:
         """
         sample = SampleMetadata.query.filter_by(tag=tag).first_or_404()
-        return sample, 200
+        return self.samplemetadataschema.dumps(sample), 200

src/schemas.py

@@ -1,5 +1,7 @@
 #!/usr/bin/env python3
-from marshmallow import Schema, fields
+from models import SampleMetadata
+from marshm import ma
+from marshmallow import fields
 
 
 """
@@ -13,12 +15,21 @@ __module_name__ = "schemas"
 __version__text__ = "1"
 
 
-class SampleSchema(Schema):
+class SampleSchema(ma.Schema):
     """
     Parameters:
      - date (date)
      - device_id (str)
     """
 
-    date = fields.Date(required=True)
+    date = fields.DateTime(required=True)
     device_id = fields.Str(required=True)
+
+
+class SampleMetadataSchema(ma.SQLAlchemyAutoSchema):
+    """
+    Marshmallow schema generated
+    """
+    class Meta:
+        model = SampleMetadata
+