api impl

db/__init__.py

@@ -0,0 +1,23 @@
+#db/__init__.py
+from contextlib import contextmanager
+from models import Base
+
+
+from sqlalchemy.orm import sessionmaker
+from sqlalchemy import create_engine
+import env_provider
+
+engine = create_engine(env_provider.DB_CONNECT_STRING)
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+@contextmanager
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
+
+
+def create_all():
+    with engine.begin() as conn:
+        Base.metadata.create_all(bind=conn)