use marshmallow to load json

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
+