Add DB version with alimbic and add log system

fuware/db/db_setup.py

@@ -1,8 +1,8 @@
 from collections.abc import Generator
+from contextlib import contextmanager
 from sqlalchemy.orm.session import Session
-from sqlalchemy import create_engine, event, Engine, text
+from sqlalchemy import create_engine, event, Engine
 from sqlalchemy.orm import scoped_session, sessionmaker
-
 from fuware.core.config import get_app_settings
 
 settings = get_app_settings()
@@ -10,13 +10,13 @@ settings = get_app_settings()
 def sql_global_init(db_url: str):
   connect_args = {"check_same_thread": False}
 
-  engine = create_engine(db_url, echo=True, connect_args=connect_args, pool_pre_ping=True, future=True)
+  engine = create_engine(db_url, echo=False, connect_args=connect_args, pool_pre_ping=True, future=True)
 
   SessionLocal = scoped_session(sessionmaker(autocommit=False, autoflush=False, bind=engine, future=True))
 
   return SessionLocal, engine
 
-SessionLocal, engine = sql_global_init(settings.DB_URL)  # type: ignore
+SessionLocal, engine = sql_global_init(settings.DB_URL)
 
 @event.listens_for(Engine, "connect")
 def set_sqlite_pragma(dbapi_connection, connection_record):
@@ -24,10 +24,21 @@ def set_sqlite_pragma(dbapi_connection, connection_record):
   cursor.execute("PRAGMA foreign_keys=ON")
   cursor.close()
 
-# with engine.connect() as connection:
-#   result = connection.execute(text('select "Hello"'))
+@contextmanager
+def session_context() -> Session: # type: ignore
+    """
+    session_context() provides a managed session to the database that is automatically
+    closed when the context is exited. This is the preferred method of accessing the
+    database.
 
-#   print(result.all())
+    Note: use `generate_session` when using the `Depends` function from FastAPI
+    """
+    global SessionLocal
+    sess = SessionLocal()
+    try:
+        yield sess
+    finally:
+        sess.close()
 
 def generate_session() -> Generator[Session, None, None]:
   db = SessionLocal()