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File size: 2,424 Bytes
c943274 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 | from sqlalchemy import create_engine, Column, Integer, String, Text, DateTime, Float, JSON, Boolean
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
from datetime import datetime
import os
Base = declarative_base()
class ChatSession(Base):
__tablename__ = 'chat_sessions'
id = Column(Integer, primary_key=True)
session_id = Column(String(100), unique=True, nullable=False, index=True)
created_at = Column(DateTime, default=datetime.utcnow)
last_active = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
class ChatMessage(Base):
__tablename__ = 'chat_messages'
id = Column(Integer, primary_key=True)
session_id = Column(String(100), nullable=False, index=True)
role = Column(String(20), nullable=False)
content = Column(Text, nullable=False)
sources = Column(JSON)
timestamp = Column(DateTime, default=datetime.utcnow)
class DatasetMetadata(Base):
__tablename__ = 'dataset_metadata'
id = Column(Integer, primary_key=True)
dataset_id = Column(String(100), unique=True, nullable=False, index=True)
name = Column(String(500))
category = Column(String(100))
description = Column(Text)
endpoint = Column(String(500))
fields = Column(JSON)
record_count = Column(Integer)
last_fetched = Column(DateTime)
is_active = Column(Boolean, default=True)
class EmbeddingMetadata(Base):
__tablename__ = 'embedding_metadata'
id = Column(Integer, primary_key=True)
dataset_id = Column(String(100), nullable=False, index=True)
chunk_id = Column(String(100), nullable=False, index=True)
content = Column(Text, nullable=False)
meta_info = Column(JSON)
embedding_model = Column(String(100))
created_at = Column(DateTime, default=datetime.utcnow)
def init_db():
database_url = os.getenv('DATABASE_URL')
if not database_url:
raise ValueError("DATABASE_URL environment variable not set")
engine = create_engine(database_url)
Base.metadata.create_all(engine)
Session = sessionmaker(bind=engine)
return Session()
def get_db_session():
database_url = os.getenv('DATABASE_URL')
if not database_url:
raise ValueError("DATABASE_URL environment variable not set")
engine = create_engine(database_url)
Session = sessionmaker(bind=engine)
return Session()
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