project-samarth

database/schema.py

@@ -0,0 +1,70 @@
+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()