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Redis Enhanced

Get, send and update data in Redis with enhanced operations

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Overview

The node "Redis Enhanced" provides a comprehensive interface to interact with a Redis database, supporting a wide range of Redis operations. Specifically, the "Sorted Set Remove" operation allows users to remove one or more members from a sorted set stored in Redis. This is useful for managing ranked or scored collections where certain elements need to be deleted based on application logic.

Common scenarios include:

  • Removing outdated or irrelevant entries from leaderboards.
  • Cleaning up sorted sets that track time-sensitive data.
  • Managing priority queues by removing specific items.

For example, if you have a sorted set representing user scores in a game, you can remove players who are no longer active by specifying their member names.

Properties

Name Meaning
Sorted Set The name of the sorted set in Redis from which members will be removed.
Members Space-separated list of members to remove from the sorted set (e.g., "member1 member2").

Output

The output JSON object contains information about the removal operation:

  • sortedSet: The name of the sorted set affected.
  • removed: The number of members successfully removed.
  • members: An array of the members that were requested to be removed.

Example output:

{
  "sortedSet": "mySortedSet",
  "removed": 2,
  "members": ["member1", "member2"]
}

This confirms which members were targeted and how many were actually removed.

Dependencies

  • Requires a connection to a Redis instance.
  • Needs an API key credential or equivalent authentication configured in n8n to connect securely to Redis.
  • The node uses the Redis client library internally to perform commands.

Troubleshooting

  • Issue: No members are removed even though specified.

    • Cause: Members may not exist in the sorted set.
    • Solution: Verify the member names are correct and exist in the sorted set.

  • Issue: Error related to connection or authentication.

    • Cause: Invalid or missing Redis credentials.
    • Solution: Check the Redis credentials configuration in n8n and ensure connectivity.

  • Error: "Score-member pairs must be even number of arguments"

    • Note: This error applies to the "Sorted Set Add" operation but indicates input format issues; ensure inputs are correctly formatted.

  • If the node throws errors during execution, enabling "Continue On Fail" can help process other items without stopping the workflow.

Links and References

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