use new api

mealapi/schemas/ingredientschema.py

@@ -3,7 +3,8 @@ from .marshm import ma
 from model import Ingredient
 
 
-class IngredientSchema(ma.ModelSchema):
+class IngredientSchema(ma.SQLAlchemyAutoSchema):
 
     class Meta:
         model = Ingredient
+        load_instance = True

mealapi/schemas/mealschema.py

@@ -4,10 +4,11 @@ from model import Meal
 from .ingredientschema import IngredientSchema
 
 
-class MealSchema(ma.ModelSchema):
+class MealSchema(ma.SQLAlchemyAutoSchema):
 
     # A list of author objects
     authors = ma.Nested(IngredientSchema, many=True)
 
     class Meta:
         model = Meal
+        load_instance = True