made genre use the schemas properly to return actual joined data, not just genre_id. Also made author/publisher/genre all use many=True, while that is nto true for publisher, it makes the jinja code consisten -- Might need to fix this one day if the writing to the database is somehow more automatic and needs it to be an actual one-to-many, not a many-to-many

main.py

@@ -91,16 +91,14 @@ class Genre_LstSchema(ma.SQLAlchemyAutoSchema):
 
 class BookSchema(ma.SQLAlchemyAutoSchema):
     author = ma.Nested(AuthorSchema, many=True)
-    publisher = ma.Nested(PublisherSchema)
+    publisher = ma.Nested(PublisherSchema, many=True)
+    genre = ma.Nested(Genre_LstSchema, many=True)
     class Meta:
         model = Book
         include_relationships = True
         load_instance = True
 
 ### DDP: do I need many=True on Author as books have many authors? (or in BookSchema declaration above?)
-author_schema = AuthorSchema(many=True)
-publisher_schema = PublisherSchema()
-genre_schema = Genre_LstSchema(many=True)
 book_schema = BookSchema()
 
 ####################################### ROUTES #######################################