symtom

client <-http-> nginx(proxy) <-http-> was

설정 - djangoProj/configs/settings.py

Symtoms

unhashable type: 'collections.OrderedDict'

N:M recursive 관계

the class to which the model is related, which works exactly the same as it does for ForeignKey, including recursive and lazy relationships.

• 하나의 모델 안에서 ManyToManyField 사용

  class Person(models.Model):
    friends = models.ManyToManyField("self")
  

• symmetrical=True 속성

  ManyToManyFields on self 에서만 사용 가능(default True)
  Person 모델에 person_set 속성을 추가 안하고 symmetrical 필드로 여겨짐
  intermediary 모델에서도 가능
  

• Through 모델 : 연관을 위해 DB 테이블로 암시적으로 생성됨
• Through 모델을 통한 필드는 시리얼라이저에서 Read-only 필드 ``` class Person(models.Model): name = models.CharField(max_length=50)

Symtoms

django rest response object should return correspond content type with request. ``` REST framework supports HTTP content negotiation by providing a Response class which allows you to return content that can be rendered into multiple content types, depending on the client request.