에러내용 :

sqlalchemy.exc.InvalidRequestError: When initializing mapper mapped class Nutrient->nutrients, expression 'nutrient.product_id == product.product_id' failed to locate a name ("name 'nutrient' is not defined"). If this is a class name, consider adding this relationship() to the <class 'market.models.Nutrient'> class after both dependent classes have been defined.

mysql에 있는 db의 정보와 models.py에 있는 정보가 불일치해서 나오는 현상.