Set alchemysession core mode on by default

Bump minimum telethon-session-sqlalchemy version for core mode support on non-postgres engines
Fixes #263

example-config.yaml

@@ -27,9 +27,6 @@ appservice:
     #   SQLite:   sqlite:///filename.db
     #   Postgres: postgres://username:password@hostname/dbname
     database: sqlite:///mautrix-telegram.db
-    # Whether or not to use SQLAlchemy Core for common database actions. Use if the bridge is
-    # being bottlenecked on ORM commits. Only supported with PostgreSQL.
-    sqlalchemy_core_mode: false
 
     # Public part of web server for out-of-Matrix interaction with the bridge.
     # Used for things like login if the user wants to make sure the 2FA password isn't stored in

mautrix_telegram/__main__.py

@@ -79,11 +79,7 @@ Base.metadata.bind = db_engine
 session_container = AlchemySessionContainer(engine=db_engine, session=db_session,
                                             table_base=Base, table_prefix="telethon_",
                                             manage_tables=False)
-if config["appservice.sqlalchemy_core_mode"]:
-    try:
-        session_container.core_mode = True
-    except AttributeError:
-        log.error("Current version of teleton-session-sqlalchemy does not support core mode")
+session_container.core_mode = True
 
 loop = asyncio.get_event_loop()  # type: asyncio.AbstractEventLoop
 

mautrix_telegram/config.py

@@ -165,7 +165,6 @@ class Config(DictWithRecursion):
         copy("appservice.max_body_size")
 
         copy("appservice.database")
-        copy("appservice.sqlalchemy_core_mode")
 
         copy("appservice.public.enabled")
         copy("appservice.public.prefix")

setup.py

@@ -40,7 +40,7 @@ setuptools.setup(
         "future-fstrings>=0.4.2",
         "python-magic>=0.4.15,<0.5",
         "telethon>=1.5.5,<1.6",
-        "telethon-session-sqlalchemy>=0.2.6,<0.3",
+        "telethon-session-sqlalchemy>=0.2.7,<0.3",
     ],
     extras_require=extras,