Fix slack bot creation with document sets

backend/danswer/db/persona.py

@@ -506,18 +506,29 @@ def get_prompt_by_id(
     return prompt
 
 
+def _get_default_prompt(db_session: Session) -> Prompt:
+    stmt = select(Prompt).where(Prompt.id == 0)
+    result = db_session.execute(stmt)
+    prompt = result.scalar_one_or_none()
+
+    if prompt is None:
+        raise RuntimeError("Default Prompt not found")
+
+    return prompt
+
+
+def get_default_prompt(db_session: Session) -> Prompt:
+    return _get_default_prompt(db_session)
+
+
 @lru_cache()
-def get_default_prompt() -> Prompt:
+def get_default_prompt__read_only() -> Prompt:
+    """Due to the way lru_cache / SQLAlchemy works, this can cause issues
+    when trying to attach the returned `Prompt` object to a `Persona`. If you are
+    doing anything other than reading, you should use the `get_default_prompt`
+    method instead."""
     with Session(get_sqlalchemy_engine()) as db_session:
-        stmt = select(Prompt).where(Prompt.id == 0)
-
-        result = db_session.execute(stmt)
-        prompt = result.scalar_one_or_none()
-
-        if prompt is None:
-            raise RuntimeError("Default Prompt not found")
-
-        return prompt
+        return _get_default_prompt(db_session)
 
 
 def get_persona_by_id(

backend/danswer/db/slack_bot_config.py

@@ -51,7 +51,7 @@ def create_slack_bot_persona(
 
     # create/update persona associated with the slack bot
     persona_name = _build_persona_name(channel_names)
-    default_prompt = get_default_prompt()
+    default_prompt = get_default_prompt(db_session)
     persona = upsert_persona(
         user=None,  # Slack Bot Personas are not attached to users
         persona_id=existing_persona_id,

backend/danswer/llm/answering/prompts/citations_prompt.py

@@ -5,7 +5,7 @@ from danswer.chat.models import LlmDoc
 from danswer.configs.chat_configs import MULTILINGUAL_QUERY_EXPANSION
 from danswer.configs.model_configs import GEN_AI_SINGLE_USER_MESSAGE_EXPECTED_MAX_TOKENS
 from danswer.db.models import Persona
-from danswer.db.persona import get_default_prompt
+from danswer.db.persona import get_default_prompt__read_only
 from danswer.file_store.utils import InMemoryChatFile
 from danswer.llm.answering.models import PromptConfig
 from danswer.llm.factory import get_llm_for_persona
@@ -96,7 +96,7 @@ def compute_max_document_tokens_for_persona(
     actual_user_input: str | None = None,
     max_llm_token_override: int | None = None,
 ) -> int:
-    prompt = persona.prompts[0] if persona.prompts else get_default_prompt()
+    prompt = persona.prompts[0] if persona.prompts else get_default_prompt__read_only()
     return compute_max_document_tokens(
         prompt_config=PromptConfig.from_model(prompt),
         llm_config=get_llm_for_persona(persona).config,