📢 Hivemind Bug Fix: Solve the Problem of Users Having Empty Subscribed Content

Summary

We've fixed two critical bugs in the bridge.get_ranked_posts API endpoint that were affecting users when querying their subscribed communities.

Issues Fixed

1. Cache Key Bug for Personal Feed (tag='my')

Problem: When using bridge.get_ranked_posts with tag='my' to get posts from subscribed communities, the cache key was not including the observer_id. This caused different users (or the same user with different subscription states) to share the same cache entry, resulting in incorrect or empty results.

Impact: Users couldn't reliably get posts from their subscribed communities when using the tag='my' parameter.

Fix: The cache key now includes observer_id when tag='my', ensuring each user gets their personalized results correctly cached.

Commit: a3f1090266fe33400bb246afa97785bd297a0851

2. Query Timeout for created Sort

Problem: When using sort='created' with tag='my', the query had no time limit and would attempt to scan all historical posts from subscribed communities. For communities with large amounts of historical data (hundreds of thousands of posts), this caused query timeouts.

Impact: Users experienced request timeouts when trying to get posts sorted by creation date from their subscribed communities.

Fix: Added a 30-day time limit for created sort queries to prevent timeouts while still providing useful results.

Commit: 20f18f4eab44c49f9b778a0886b1e362d2a40a66

Technical Details

API Endpoint

• bridge.get_ranked_posts

Parameters Affected

• tag='my' - Personal feed from subscribed communities
• sort='created' - Sort by creation date

Example Request

{
  "jsonrpc": "2.0",
  "method": "bridge.get_ranked_posts",
  "params": {
    "sort": "created",
    "tag": "my",
    "observer": "username"
  }
}

Pull Request

These fixes are included in PR #358.

Status

✅ Fixed and Deployed

Both issues have been resolved and the fixes are now live. Users should now be able to:

• Reliably get posts from their subscribed communities using tag='my'
• Successfully query posts sorted by creation date without experiencing timeouts

Testing

If you were previously experiencing issues with:

• Empty results when using tag='my'
• Timeout errors when using sort='created' with tag='my'

Please test again and confirm the issues are resolved. If you encounter any problems, please report them in the Hivemind GitHub repository.

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Note: The cache for created sort has a 3-second TTL, so you may need to wait a few seconds after the fix is deployed before seeing the corrected behavior if you had previously cached empty results.