[FastAPI] 14. SQLAlchemy์˜ One-to-Many, Many-to-Many, Self referential relationship

์ง€๋‚œ ํฌ์ŠคํŠธ์—์„œ๋Š” ๋‹จ์ˆœ Column ๋ฐ์ดํ„ฐ์™€ ๊ทธ๋ฆฌ๊ณ , ๋‹จ์ผ ์™ธ๋ž˜ํ‚ค ํ•˜๋‚˜์˜ ๊ด€๊ณ„ ๋ฐ์ดํ„ฐ๋ฅผ Pydantic์œผ๋กœ ๋งคํ•‘ํ•˜์—ฌ Serialize/Deserialize ํ•˜๋Š” ๊ฒƒ์— ๋Œ€ํ•ด ์•Œ์•„๋ดค์Šต๋‹ˆ๋‹ค. ์ด๋ฒˆ ํฌ์ŠคํŠธ์—์„œ๋Š” Many-to-Many, One-to-Many ํ˜•ํƒœ์˜ Foreig...