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@omertuc omertuc commented Sep 2, 2025

Description

When checking whether an existing conversation already exists before persisting user conversation details, the user_id filter is unnecessary - the conversation_id is already unique, and ownership has already been validated in prior steps.

This change removes the redundant user_id filter from the query.

Inspired by this comment

Type of change

  • Refactor
  • New feature
  • Bug fix
  • CVE fix
  • Optimization
  • Documentation Update
  • Configuration Update
  • Bump-up service version
  • Bump-up dependent library
  • Bump-up library or tool used for development (does not change the final image)
  • CI configuration change
  • Konflux configuration change
  • Unit tests improvement
  • Integration tests improvement
  • End to end tests improvement

Related Tickets & Documents

  • Related Issue #
  • Closes #

Checklist before requesting a review

  • I have performed a self-review of my code.
  • PR has passed all pre-merge test jobs.
  • If it is a core feature, I have added thorough tests.

Testing

  • Please provide detailed steps to perform tests related to this code change.
  • How were the fix/results from this change verified? Please provide relevant screenshots or results.

Tested manually. User conversations are still persisted correctly. Unit tests are still passing

Summary by CodeRabbit

  • Refactor
    • Streamlined conversation persistence to identify existing conversations by ID, ensuring consistent updates to metadata (last used model/provider, last activity time, message counts).
    • Creation of new conversations remains unchanged.
    • Expected impact: more reliable conversation history continuity across sessions; no visual changes.

When checking whether an existing conversation already exists before
persisting user conversation details, the `user_id` filter is
unnecessary - the `conversation_id` is already unique, and ownership has
already been validated in prior steps.

This change removes the redundant `user_id` filter from the query.
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coderabbitai bot commented Sep 2, 2025

Walkthrough

The lookup for an existing UserConversation in persist_user_conversation_details now filters only by conversation id, not by both id and user_id. Update and create paths remain unchanged, and the session is still committed.

Changes

Cohort / File(s) Summary
Query endpoint update
src/app/endpoints/query.py
In persist_user_conversation_details, changed existing record lookup from filter_by(id, user_id) to filter_by(id) only; update and insert logic unchanged; still commits session.

Sequence Diagram(s)

sequenceDiagram
  autonumber
  participant Client
  participant Endpoint as query.persist_user_conversation_details
  participant DB as Database

  Client->>Endpoint: persist_user_conversation_details(user_id, conversation_id, ...)
  Note over Endpoint: Check existing conversation by id only
  Endpoint->>DB: SELECT * FROM UserConversation WHERE id = :conversation_id
  alt Found
    DB-->>Endpoint: existing_conversation
    Note over Endpoint: Update last_used_model/provider, last_message_at, increment message_count
    Endpoint->>DB: UPDATE UserConversation SET ...
  else Not Found
    DB-->>Endpoint: None
    Note over Endpoint: Create new UserConversation with provided user_id
    Endpoint->>DB: INSERT INTO UserConversation (...)
  end
  Endpoint->>DB: COMMIT
  DB-->>Endpoint: OK
  Endpoint-->>Client: Return updated/created details
Loading

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

Suggested reviewers

  • tisnik

Poem

A twitch of whiskers, hop and glide,
We query chats by id, not side.
If found, we nudge the count anew,
If not, we craft a fresh debut.
Commit, and thump—our work is done,
Carrots logged, another run! 🥕🐇

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@omertuc omertuc mentioned this pull request Sep 2, 2025
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Actionable comments posted: 0

🧹 Nitpick comments (2)
src/app/endpoints/query.py (2)

83-85: Prefer primary-key load via session.get for clarity and efficiency.

Apply:

-        existing_conversation = (
-            session.query(UserConversation).filter_by(id=conversation_id).first()
-        )
+        existing_conversation = session.get(UserConversation, conversation_id)

100-105: Make updates atomic to prevent lost increments under concurrent requests.

Two workers can overwrite message_count or last_message_at. Use a single SQL UPDATE with a DB-side increment and timestamp.

Apply:

-        else:
-            existing_conversation.last_used_model = model
-            existing_conversation.last_used_provider = provider_id
-            existing_conversation.last_message_at = datetime.now(UTC)
-            existing_conversation.message_count += 1
+        else:
+            session.execute(
+                update(UserConversation)
+                .where(UserConversation.id == conversation_id)
+                .values(
+                    last_used_model=model,
+                    last_used_provider=provider_id,
+                    last_message_at=func.now(),
+                    message_count=UserConversation.message_count + 1,
+                )
+            )

Add import (outside this hunk):

+from sqlalchemy import update, func
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📥 Commits

Reviewing files that changed from the base of the PR and between c017e78 and d7a3c09.

📒 Files selected for processing (1)
  • src/app/endpoints/query.py (1 hunks)
🧰 Additional context used
🧬 Code graph analysis (1)
src/app/endpoints/query.py (1)
src/models/database/conversations.py (1)
  • UserConversation (11-36)
⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (2)
  • GitHub Check: build-pr
  • GitHub Check: e2e_tests
🔇 Additional comments (1)
src/app/endpoints/query.py (1)

83-85: Ensure ownership validation before persisting conversation details
Confirm that every call to persist_user_conversation_details —in src/app/endpoints/query.py (around line 242) and src/app/endpoints/streaming_query.py (around line 652)—occurs only after the user’s ownership of the conversation has been validated.

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LGTM

@tisnik tisnik merged commit 7d1d95e into lightspeed-core:main Sep 2, 2025
19 checks passed
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2 participants