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import os | ||
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from alembic import command | ||
from alembic.config import Config | ||
from sqlalchemy import create_engine | ||
from sqlalchemy.engine.base import Engine | ||
from sqlalchemy.orm import Session as SQLAlchemySession | ||
from sqlalchemy.orm import scoped_session, sessionmaker | ||
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from .models import Base | ||
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class DatabaseManager: | ||
def __init__(self, echo: bool = False): | ||
self.database_uri = os.environ.get("EMBEDCHAIN_DB_URI") | ||
self.echo = echo | ||
self.engine: Engine = None | ||
self._session_factory = None | ||
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def setup_engine(self) -> None: | ||
"""Initializes the database engine and session factory.""" | ||
if not self.database_uri: | ||
raise RuntimeError("Database URI is not set. Set the EMBEDCHAIN_DB_URI environment variable.") | ||
connect_args = {} | ||
if self.database_uri.startswith("sqlite"): | ||
connect_args["check_same_thread"] = False | ||
self.engine = create_engine(self.database_uri, echo=self.echo, connect_args=connect_args) | ||
self._session_factory = scoped_session(sessionmaker(bind=self.engine)) | ||
Base.metadata.bind = self.engine | ||
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def init_db(self) -> None: | ||
"""Creates all tables defined in the Base metadata.""" | ||
if not self.engine: | ||
raise RuntimeError("Database engine is not initialized. Call setup_engine() first.") | ||
Base.metadata.create_all(self.engine) | ||
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def get_session(self) -> SQLAlchemySession: | ||
"""Provides a session for database operations.""" | ||
if not self._session_factory: | ||
raise RuntimeError("Session factory is not initialized. Call setup_engine() first.") | ||
return self._session_factory() | ||
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def close_session(self) -> None: | ||
"""Closes the current session.""" | ||
if self._session_factory: | ||
self._session_factory.remove() | ||
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def execute_transaction(self, transaction_block): | ||
"""Executes a block of code within a database transaction.""" | ||
session = self.get_session() | ||
try: | ||
transaction_block(session) | ||
session.commit() | ||
except Exception as e: | ||
session.rollback() | ||
raise e | ||
finally: | ||
self.close_session() | ||
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# Singleton pattern to use throughout the application | ||
database_manager = DatabaseManager() | ||
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# Convenience functions for backward compatibility and ease of use | ||
def setup_engine(database_uri: str, echo: bool = False) -> None: | ||
database_manager.database_uri = database_uri | ||
database_manager.echo = echo | ||
database_manager.setup_engine() | ||
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def alembic_upgrade() -> None: | ||
"""Upgrades the database to the latest version.""" | ||
alembic_config_path = os.path.join(os.path.dirname(__file__), "..", "..", "alembic.ini") | ||
alembic_cfg = Config(alembic_config_path) | ||
command.upgrade(alembic_cfg, "head") | ||
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def init_db() -> None: | ||
alembic_upgrade() | ||
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def get_session() -> SQLAlchemySession: | ||
return database_manager.get_session() | ||
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def execute_transaction(transaction_block): | ||
database_manager.execute_transaction(transaction_block) |
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import uuid | ||
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from sqlalchemy import TIMESTAMP, Column, Integer, String, Text, func | ||
from sqlalchemy.orm import declarative_base | ||
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Base = declarative_base() | ||
metadata = Base.metadata | ||
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class DataSource(Base): | ||
__tablename__ = "ec_data_sources" | ||
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id = Column(String, primary_key=True, default=lambda: str(uuid.uuid4())) | ||
app_id = Column(Text, index=True) | ||
hash = Column(Text, index=True) | ||
type = Column(Text, index=True) | ||
value = Column(Text) | ||
meta_data = Column(Text, name="metadata") | ||
is_uploaded = Column(Integer, default=0) | ||
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class ChatHistory(Base): | ||
__tablename__ = "ec_chat_history" | ||
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app_id = Column(String, primary_key=True) | ||
id = Column(String, primary_key=True) | ||
session_id = Column(String, primary_key=True, index=True) | ||
question = Column(Text) | ||
answer = Column(Text) | ||
meta_data = Column(Text, name="metadata") | ||
created_at = Column(TIMESTAMP, default=func.current_timestamp(), index=True) |
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Original file line number | Diff line number | Diff line change |
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@@ -1,6 +1,6 @@ | ||
[tool.poetry] | ||
name = "embedchain" | ||
version = "0.1.116" | ||
version = "0.1.117" | ||
description = "Simplest open source retrieval (RAG) framework" | ||
authors = [ | ||
"Taranjeet Singh <[email protected]>", | ||
|
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