init project

backend/app/database.py

@@ -0,0 +1,26 @@
+import os
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker, DeclarativeBase
+
+DB_HOST = os.getenv("DB_HOST", "localhost")
+DB_PORT = os.getenv("DB_PORT", "3306")
+DB_USER = os.getenv("DB_USER", "root")
+DB_PASS = os.getenv("DB_PASS", "root123")
+DB_NAME = os.getenv("DB_NAME", "ai_doc_template")
+
+DATABASE_URL = f"mysql+pymysql://{DB_USER}:{DB_PASS}@{DB_HOST}:{DB_PORT}/{DB_NAME}?charset=utf8mb4"
+
+engine = create_engine(DATABASE_URL, echo=False)
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()