[Bugfix] fix chat history management when app.reset (#1161)

Co-authored-by: Deven Patel <deven298@yahoo.com>

docs/api-reference/pipeline/delete.mdx

@@ -2,7 +2,7 @@
 title: 🗑 delete
 ---
 
-`delete_chat_history()` method allows you to delete all previous messages in a chat history.
+`delete_session_chat_history()` method allows you to delete all previous messages in a chat history.
 
 ## Usage
 
@@ -15,5 +15,5 @@ app.add("https://www.forbes.com/profile/elon-musk")
 
 app.chat("What is the net worth of Elon Musk?")
 
-app.delete_chat_history()
+app.delete_session_chat_history()
 ```

embedchain/embedchain.py

@@ -663,13 +663,17 @@ class EmbedChain(JSONSerializable):
         self.db.reset()
         self.cursor.execute("DELETE FROM data_sources WHERE pipeline_id = ?", (self.config.id,))
         self.connection.commit()
-        self.delete_chat_history()
+        self.delete_all_chat_history(app_id=self.config.id)
         # Send anonymous telemetry
         self.telemetry.capture(event_name="reset", properties=self._telemetry_props)
 
     def get_history(self, num_rounds: int = 10, display_format: bool = True):
         return self.llm.memory.get(app_id=self.config.id, num_rounds=num_rounds, display_format=display_format)
 
-    def delete_chat_history(self, session_id: str = "default"):
+    def delete_session_chat_history(self, session_id: str = "default"):
         self.llm.memory.delete(app_id=self.config.id, session_id=session_id)
         self.llm.update_history(app_id=self.config.id)
+
+    def delete_all_chat_history(self, app_id: str):
+        self.llm.memory.delete(app_id=app_id)
+        self.llm.update_history(app_id=app_id)

embedchain/memory/base.py

@@ -53,7 +53,7 @@ class ChatHistory:
         logging.info(f"Added chat memory to db with id: {memory_id}")
         return memory_id
 
-    def delete(self, app_id: str, session_id: str):
+    def delete(self, app_id: str, session_id: Optional[str] = None):
         """
         Delete all chat history for a given app_id and session_id.
         This is useful for deleting chat history for a given user.
@@ -63,8 +63,14 @@ class ChatHistory:
 
         :return: None
         """
-        DELETE_CHAT_HISTORY_QUERY = "DELETE FROM ec_chat_history WHERE app_id=? AND session_id=?"
-        self.cursor.execute(DELETE_CHAT_HISTORY_QUERY, (app_id, session_id))
+        if session_id:
+            DELETE_CHAT_HISTORY_QUERY = "DELETE FROM ec_chat_history WHERE app_id=? AND session_id=?"
+            params = (app_id, session_id)
+        else:
+            DELETE_CHAT_HISTORY_QUERY = "DELETE FROM ec_chat_history WHERE app_id=?"
+            params = (app_id,)
+
+        self.cursor.execute(DELETE_CHAT_HISTORY_QUERY, params)
         self.connection.commit()
 
     def get(self, app_id, session_id, num_rounds=10, display_format=False) -> list[ChatMessage]:
@@ -99,7 +105,7 @@ class ChatHistory:
                 history.append(memory)
         return history
 
-    def count(self, app_id: str, session_id: str):
+    def count(self, app_id: str, session_id: Optional[str] = None):
         """
         Count the number of chat messages for a given app_id and session_id.
 
@@ -108,8 +114,14 @@ class ChatHistory:
 
         :return: The number of chat messages for a given app_id and session_id
         """
-        QUERY = "SELECT COUNT(*) FROM ec_chat_history WHERE app_id=? AND session_id=?"
-        self.cursor.execute(QUERY, (app_id, session_id))
+        if session_id:
+            QUERY = "SELECT COUNT(*) FROM ec_chat_history WHERE app_id=? AND session_id=?"
+            params = (app_id, session_id)
+        else:
+            QUERY = "SELECT COUNT(*) FROM ec_chat_history WHERE app_id=?"
+            params = (app_id,)
+
+        self.cursor.execute(QUERY, params)
         count = self.cursor.fetchone()[0]
         return count
 

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "embedchain"
-version = "0.1.61"
+version = "0.1.62"
 description = "Data platform for LLMs - Load, index, retrieve and sync any unstructured data"
 authors = [
     "Taranjeet Singh <taranjeet@embedchain.ai>",

tests/memory/test_chat_memory.py

@@ -59,9 +59,26 @@ def test_delete_chat_history(chat_memory_instance):
 
         chat_memory_instance.add(app_id, session_id, chat_message)
 
+    session_id_2 = "test_session_2"
+
+    for i in range(1, 6):
+        human_message = f"Question {i}"
+        ai_message = f"Answer {i}"
+
+        chat_message = ChatMessage()
+        chat_message.add_user_message(human_message)
+        chat_message.add_ai_message(ai_message)
+
+        chat_memory_instance.add(app_id, session_id_2, chat_message)
+
     chat_memory_instance.delete(app_id, session_id)
 
     assert chat_memory_instance.count(app_id, session_id) == 0
+    assert chat_memory_instance.count(app_id) == 5
+
+    chat_memory_instance.delete(app_id)
+
+    assert chat_memory_instance.count(app_id) == 0
 
 
 @pytest.fixture