While connect to external knowledge base, cannot publish app without rerank model

[gavinlichn]

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Dify version

1.0.0

Cloud or Self Hosted

Self Hosted (Docker)

Steps to reproduce

I have created an app with external knowledge-base, and disabled rerank in knowledge-base setting.
while trying to publish app, it failed with "A configured rerank model is required"

✔️ Expected Behavior

success to pubsh app

❌ Actual Behavior

app cannot publish, with a failure notification

[dosubot]

Hey @gavinlichn! 👋 I'm here to help you with any bugs, questions, or contributions you have for Dify. Let's tackle this issue together!

There are similar issues related to the requirement of a rerank model when publishing an app with an external knowledge base in Dify.

1. Open Issue: The "Rerank Model is required" error occurs because the Multi-Path Retrieval mode in Dify requires a Rerank model to function correctly, even if you have set the Rerank option to off. To resolve this issue, you need to configure a Rerank model by entering the "Model Provider" page and filling in the Rerank model's API key ^[1].

2. Closed Issue: To resolve the issue '[Knowledge Retrieval] Rerank model cannot be empty,' ensure that the rerank model is properly configured in the retrieval settings. This error typically occurs when the rerank model is not set up correctly, especially when the retrieval mode is set to multiWay. Verify that the multiple_retrieval_config is correctly set up with a rerank model ^[2].

You might want to check your configuration settings and ensure that a rerank model is properly set up, even if you have disabled it in the settings.

To continue talking to Dosu, mention @dosu.

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[crazywoola]

Fixed in Fix: reranker OFF logic to preserve user setting (#15235)