[Feature] Add support to use any sql database as the metadata storage for embedchain apps (#1273)

embedchain/core/db/models.py

@@ -0,0 +1,31 @@
+import uuid
+
+from sqlalchemy import TIMESTAMP, Column, Integer, String, Text, func
+from sqlalchemy.orm import declarative_base
+
+Base = declarative_base()
+metadata = Base.metadata
+
+
+class DataSource(Base):
+    __tablename__ = "ec_data_sources"
+
+    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)
+
+
+class ChatHistory(Base):
+    __tablename__ = "ec_chat_history"
+
+    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)