https://programmer.group/play-django-2.0-django-notes-foundation-11-music-website-development.html
https://buildmedia.readthedocs.org/media/pdf/django/latest/django.pdf
\
one-to-one vs ForeignKey
many-to-many, throughfield
https://docs.djangoproject.com/en/3.1/ref/models/fields/
https://velog.io/@k904808/ManyToManyField-in-Django
related_name / related_query_name
https://brunch.co.kr/@ddangdol/1
역참조 filter + annotate
https://leemoney93.tistory.com/24
URL parameter
https://velog.io/@swhybein/django-queryurl-%ED%8C%8C%EB%9D%BC%EB%AF%B8%ED%84%B0
reverse+related_name
https://velog.io/@brighten_the_way/Django%EC%99%80-Reverse-relations%EA%B3%BC-Relatedname
def backend_engineer():