fix: add pre ping to create_engine call

Author: jiakf

indexd/default_settings.py

@@ -15,19 +15,22 @@
     "driver": SQLAlchemyIndexDriver(
         PG_URL,
         auto_migrate=AUTO_MIGRATE,
-        echo=SQLALCHEMY_VERBOSE,
+        # echo=SQLALCHEMY_VERBOSE,
         index_config={
             "DEFAULT_PREFIX": "testprefix:",
             "ADD_PREFIX_ALIAS": True,
             "PREPEND_PREFIX": True,
         },
-        pool_pre_ping=True,
+        # pool_pre_ping=True,
     ),
 }
 
 CONFIG["ALIAS"] = {
     "driver": SQLAlchemyAliasDriver(
-        PG_URL, auto_migrate=AUTO_MIGRATE, echo=SQLALCHEMY_VERBOSE, pool_pre_ping=True
+        PG_URL,
+        auto_migrate=AUTO_MIGRATE,
+        # echo=SQLALCHEMY_VERBOSE,
+        # pool_pre_ping=True
     ),
 }
 
@@ -52,6 +55,9 @@
     },
 ]
 
-AUTH = SQLAlchemyAuthDriver(PG_URL, pool_pre_ping=True)
+AUTH = SQLAlchemyAuthDriver(
+    PG_URL,
+    # pool_pre_ping=True
+)
 
 settings = {"config": CONFIG, "auth": AUTH}

indexd/driver_base.py

@@ -4,16 +4,17 @@
 
 Base = declarative_base()
 
+
 class SQLAlchemyDriverBase(object):
-    '''
+    """
     SQLAlchemy implementation of index driver.
-    '''
+    """
 
     def __init__(self, conn, **config):
-        '''
+        """
         Initialize the SQLAlchemy database driver.
-        '''
-        engine = create_engine(conn, **config)
+        """
+        engine = create_engine(conn, **config, pool_pre_ping=True, echo=True)
         if not database_exists(engine.url):
             create_database(engine.url)
         self.engine = engine