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[PR #28681] fix: truncate auto-populated description to prevent 400-char limit error #32136

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opened 2026-02-21 20:50:49 -05:00 by yindo · 0 comments
yindo commented 2026-02-21 20:50:49 -05:00
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Original Pull Request: https://github.com/langgenius/dify/pull/28681

State: closed
Merged: Yes

Fixes #28680

Important

  1. Make sure you have read our contribution guidelines
  2. Ensure there is an associated issue and you have been assigned to it
  3. Use the correct syntax to link this PR: Fixes #<issue number>.

Summary

When application description is empty, the system automatically uses the prompt as description via desc_or_prompt property. This caused issues when prompts exceeded 400 characters, preventing users from modifying application names due to description length validation.

Changes:

  • Truncate pre_prompt to 200 characters when used as description
  • Add ellipsis ("...") to indicate truncation
  • Ensure auto-populated description stays well within 400-char limit

Fixes the issue where Agent/Chatbot applications with long prompts could not be renamed after creation.

Screenshots

Before After
... ...

Checklist

  • This change requires a documentation update, included: Dify Document
  • I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
  • I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
  • I've updated the documentation accordingly.
  • I ran dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods
**Original Pull Request:** https://github.com/langgenius/dify/pull/28681 **State:** closed **Merged:** Yes --- Fixes #28680 > [!IMPORTANT] > > 1. Make sure you have read our [contribution guidelines](https://github.com/langgenius/dify/blob/main/CONTRIBUTING.md) > 1. Ensure there is an associated issue and you have been assigned to it > 1. Use the correct syntax to link this PR: `Fixes #<issue number>`. ## Summary <!-- Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change. --> When application description is empty, the system automatically uses the prompt as description via desc_or_prompt property. This caused issues when prompts exceeded 400 characters, preventing users from modifying application names due to description length validation. Changes: - Truncate pre_prompt to 200 characters when used as description - Add ellipsis ("...") to indicate truncation - Ensure auto-populated description stays well within 400-char limit Fixes the issue where Agent/Chatbot applications with long prompts could not be renamed after creation. ## Screenshots | Before | After | |--------|-------| | ... | ... | ## Checklist - [ ] This change requires a documentation update, included: [Dify Document](https://github.com/langgenius/dify-docs) - [x] I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!) - [x] I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change. - [x] I've updated the documentation accordingly. - [x] I ran `dev/reformat`(backend) and `cd web && npx lint-staged`(frontend) to appease the lint gods
yindo added the pull-request label 2026-02-21 20:50:49 -05:00
yindo closed this issue 2026-02-21 20:50:49 -05:00
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Reference: langgenius/dify#32136
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