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https://github.com/LonamiWebs/Telethon.git
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Fix SQLAlchemy implementation
This commit is contained in:
Tulir Asokan
parent
dc2229fdba
commit
c1a8896faa
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@ -1,3 +1,4 @@
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from .abstract import Session
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from .memory import MemorySession
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from .sqlite import SQLiteSession
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from .sqlalchemy import AlchemySessionContainer, AlchemySession
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@ -1,32 +1,63 @@
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from sqlalchemy.ext.declarative import declarative_base
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from sqlalchemy import Column, String, Integer, Blob, orm
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from sqlalchemy import Column, String, Integer, BLOB, orm
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import sqlalchemy as sql
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from ..crypto import AuthKey
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from ..tl.types import InputPhoto, InputDocument
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from .memory import MemorySession, _SentFileType
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Base = declarative_base()
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LATEST_VERSION = 1
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class DBVersion(Base):
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__tablename__ = "version"
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class AlchemySessionContainer:
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def __init__(self, engine=None, session=None, table_prefix="",
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table_base=None, manage_tables=True):
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if isinstance(engine, str):
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engine = sql.create_engine(engine)
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self.db_engine = engine
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if not session:
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db_factory = orm.sessionmaker(bind=self.db_engine)
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self.db = orm.scoping.scoped_session(db_factory)
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else:
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self.db = session
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table_base = table_base or declarative_base()
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(self.Version, self.Session, self.Entity,
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self.SentFile) = self.create_table_classes(self.db, table_prefix,
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table_base)
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if manage_tables:
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table_base.metadata.bind = self.db_engine
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if not self.db_engine.dialect.has_table(self.db_engine,
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self.Version.__tablename__):
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table_base.metadata.create_all()
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self.db.add(self.Version(version=LATEST_VERSION))
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self.db.commit()
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else:
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self.check_and_upgrade_database()
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@staticmethod
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def create_table_classes(db, prefix, Base):
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class Version(Base):
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query = db.query_property()
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__tablename__ = "{prefix}version".format(prefix=prefix)
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version = Column(Integer, primary_key=True)
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class DBSession(Base):
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__tablename__ = "sessions"
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class Session(Base):
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query = db.query_property()
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__tablename__ = "{prefix}sessions".format(prefix=prefix)
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session_id = Column(String, primary_key=True)
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dc_id = Column(Integer, primary_key=True)
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server_address = Column(String)
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port = Column(Integer)
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auth_key = Column(Blob)
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auth_key = Column(BLOB)
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class DBEntity(Base):
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__tablename__ = "entities"
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class Entity(Base):
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query = db.query_property()
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__tablename__ = "{prefix}entities".format(prefix=prefix)
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session_id = Column(String, primary_key=True)
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id = Column(Integer, primary_key=True)
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@ -35,51 +66,30 @@ class DBEntity(Base):
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phone = Column(Integer)
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name = Column(String)
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class DBSentFile(Base):
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__tablename__ = "sent_files"
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class SentFile(Base):
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query = db.query_property()
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__tablename__ = "{prefix}sent_files".format(prefix=prefix)
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session_id = Column(String, primary_key=True)
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md5_digest = Column(Blob, primary_key=True)
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md5_digest = Column(BLOB, primary_key=True)
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file_size = Column(Integer, primary_key=True)
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type = Column(Integer, primary_key=True)
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id = Column(Integer)
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hash = Column(Integer)
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class AlchemySessionContainer:
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def __init__(self, database):
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if isinstance(database, str):
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database = sql.create_engine(database)
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self.db_engine = database
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db_factory = orm.sessionmaker(bind=self.db_engine)
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self.db = orm.scoping.scoped_session(db_factory)
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if not self.db_engine.dialect.has_table(self.db_engine,
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DBVersion.__tablename__):
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Base.metadata.create_all(bind=self.db_engine)
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self.db.add(DBVersion(version=LATEST_VERSION))
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self.db.commit()
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else:
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self.check_and_upgrade_database()
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DBVersion.query = self.db.query_property()
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DBSession.query = self.db.query_property()
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DBEntity.query = self.db.query_property()
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DBSentFile.query = self.db.query_property()
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return Version, Session, Entity, SentFile
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def check_and_upgrade_database(self):
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row = DBVersion.query.get()
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version = row.version if row else 1
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row = self.Version.query.all()
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version = row[0].version if row else 1
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if version == LATEST_VERSION:
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return
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DBVersion.query.delete()
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self.Version.query.delete()
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# Implement table schema updates here and increase version
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self.db.add(DBVersion(version=version))
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self.db.add(self.Version(version=version))
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self.db.commit()
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def new_session(self, session_id):
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@ -97,7 +107,20 @@ class AlchemySession(MemorySession):
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super().__init__()
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self.container = container
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self.db = container.db
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self.Version, self.Session, self.Entity, self.SentFile = (
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container.Version, container.Session, container.Entity,
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container.SentFile)
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self.session_id = session_id
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self.load_session()
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def load_session(self):
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sessions = self._db_query(self.Session).all()
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session = sessions[0] if sessions else None
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if session:
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self._dc_id = session.dc_id
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self._server_address = session.server_address
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self._port = session.port
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self._auth_key = AuthKey(data=session.auth_key)
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def clone(self, to_instance=None):
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cloned = to_instance or self.__class__(self.container, self.session_id)
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@ -107,16 +130,17 @@ class AlchemySession(MemorySession):
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super().set_dc(dc_id, server_address, port)
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def _update_session_table(self):
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self.db.query(DBSession).filter(
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DBSession.session_id == self.session_id).delete()
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new = DBSession(session_id=self.session_id, dc_id=self._dc_id,
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server_address=self._server_address, port=self._port,
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auth_key=self._auth_key.key if self._auth_key else b'')
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self.Session.query.filter(
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self.Session.session_id == self.session_id).delete()
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new = self.Session(session_id=self.session_id, dc_id=self._dc_id,
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server_address=self._server_address,
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port=self._port,
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auth_key=(self._auth_key.key
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if self._auth_key else b''))
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self.db.merge(new)
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def _db_query(self, dbclass, *args):
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return self.db.query(dbclass).filter(
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dbclass.session_id == self.session_id,
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return dbclass.query.filter(dbclass.session_id == self.session_id,
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*args)
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def save(self):
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@ -127,12 +151,12 @@ class AlchemySession(MemorySession):
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pass
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def delete(self):
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self._db_query(DBSession).delete()
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self._db_query(DBEntity).delete()
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self._db_query(DBSentFile).delete()
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self._db_query(self.Session).delete()
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self._db_query(self.Entity).delete()
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self._db_query(self.SentFile).delete()
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def _entity_values_to_row(self, id, hash, username, phone, name):
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return DBEntity(session_id=self.session_id, id=id, hash=hash,
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return self.Entity(session_id=self.session_id, id=id, hash=hash,
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username=username, phone=phone, name=name)
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def process_entities(self, tlo):
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@ -140,29 +164,34 @@ class AlchemySession(MemorySession):
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if not rows:
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return
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self.db.add_all(rows)
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for row in rows:
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self.db.merge(row)
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self.save()
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def get_entity_rows_by_phone(self, key):
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row = self._db_query(DBEntity, DBEntity.phone == key).one_or_none()
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row = self._db_query(self.Entity,
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self.Entity.phone == key).one_or_none()
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return row.id, row.hash if row else None
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def get_entity_rows_by_username(self, key):
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row = self._db_query(DBEntity, DBEntity.username == key).one_or_none()
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row = self._db_query(self.Entity,
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self.Entity.username == key).one_or_none()
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return row.id, row.hash if row else None
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def get_entity_rows_by_name(self, key):
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row = self._db_query(DBEntity, DBEntity.name == key).one_or_none()
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row = self._db_query(self.Entity,
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self.Entity.name == key).one_or_none()
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return row.id, row.hash if row else None
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def get_entity_rows_by_id(self, key):
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row = self._db_query(DBEntity, DBEntity.id == key).one_or_none()
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row = self._db_query(self.Entity, self.Entity.id == key).one_or_none()
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return row.id, row.hash if row else None
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def get_file(self, md5_digest, file_size, cls):
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row = self._db_query(DBSentFile, DBSentFile.md5_digest == md5_digest,
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DBSentFile.file_size == file_size,
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DBSentFile.type == _SentFileType.from_type(
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row = self._db_query(self.SentFile,
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self.SentFile.md5_digest == md5_digest,
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self.SentFile.file_size == file_size,
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self.SentFile.type == _SentFileType.from_type(
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cls).value).one_or_none()
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return row.id, row.hash if row else None
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@ -171,7 +200,7 @@ class AlchemySession(MemorySession):
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raise TypeError('Cannot cache %s instance' % type(instance))
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self.db.merge(
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DBSentFile(session_id=self.session_id, md5_digest=md5_digest,
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self.SentFile(session_id=self.session_id, md5_digest=md5_digest,
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type=_SentFileType.from_type(type(instance)).value,
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id=instance.id, hash=instance.access_hash))
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self.save()
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