langgenius/dify
1
0
Fork 0
mirror of https://github.com/langgenius/dify.git synced 2026-07-21 12:05:30 -04:00
Code Issues 775 Packages Projects Releases 10 Wiki Activity

/chat-messages API handle VL model input error #7860

New Issue
Closed
opened 2026-02-21 18:22:44 -05:00 by yindo · 3 comments
yindo commented 2026-02-21 18:22:44 -05:00
Owner
Copy Link
Copy Source

Originally created by @arzen on GitHub (Jan 23, 2025).

Self Checks

  • This is only for bug report, if you would like to ask a question, please head to Discussions.
  • I have searched for existing issues search for existing issues, including closed ones.
  • I confirm that I am using English to submit this report (我已阅读并同意 Language Policy).
  • [FOR CHINESE USERS] 请务必使用英文提交 Issue，否则会被关闭。谢谢！:）
  • Please do not modify this template :) and fill in all the required fields.

Dify version

0.15.0

Cloud or Self Hosted

Self Hosted (Docker)

Steps to reproduce

use qwen2.5 -VL model, set response_mode to "blocking" such as :

{
  "inputs": {},
    "query": "有什么手机？",
    "response_mode": "blocking",
    "conversation_id": "",
    "user": "abc-123",
    "files": [],
  "auto_generate_name": false
}

post call API /chat-messages

✔️ Expected Behavior

it can work well

❌ Actual Behavior

then respone error message:

{
    "code": "completion_request_error",
    "message": "[tongyi] Error: 2 validation errors for AssistantPromptMessage\ncontent.str\n  Input should be a valid string [type=string_type, input_value=[{'text': '你好！我...的新篇章！😊'}], input_type=list]\n    For further information visit https://errors.pydantic.dev/2.9/v/string_type\ncontent.json-or-python[json=list[PromptMessageContent],python=chain[is-instance[Sequence],function-wrap[sequence_validator()]]].0.type\n  Field required [type=missing, input_value={'text': '你好！我们...活的新篇章！😊'}, input_type=dict]\n    For further information visit https://errors.pydantic.dev/2.9/v/missing",
    "status": 400
}

if set response_mode to "streaming", it can work,

Originally created by @arzen on GitHub (Jan 23, 2025). ### Self Checks - [x] This is only for bug report, if you would like to ask a question, please head to [Discussions](https://github.com/langgenius/dify/discussions/categories/general). - [x] I have searched for existing issues [search for existing issues](https://github.com/langgenius/dify/issues), including closed ones. - [x] I confirm that I am using English to submit this report (我已阅读并同意 [Language Policy](https://github.com/langgenius/dify/issues/1542)). - [x] [FOR CHINESE USERS] 请务必使用英文提交 Issue，否则会被关闭。谢谢！:） - [x] Please do not modify this template :) and fill in all the required fields. ### Dify version 0.15.0 ### Cloud or Self Hosted Self Hosted (Docker) ### Steps to reproduce use qwen2.5 -VL model, set response_mode to "blocking" such as : ``` { "inputs": {}, "query": "有什么手机？", "response_mode": "blocking", "conversation_id": "", "user": "abc-123", "files": [], "auto_generate_name": false } ``` post call API /chat-messages ### ✔️ Expected Behavior it can work well ### ❌ Actual Behavior then respone error message: ``` { "code": "completion_request_error", "message": "[tongyi] Error: 2 validation errors for AssistantPromptMessage\ncontent.str\n Input should be a valid string [type=string_type, input_value=[{'text': '你好！我...的新篇章！😊'}], input_type=list]\n For further information visit https://errors.pydantic.dev/2.9/v/string_type\ncontent.json-or-python[json=list[PromptMessageContent],python=chain[is-instance[Sequence],function-wrap[sequence_validator()]]].0.type\n Field required [type=missing, input_value={'text': '你好！我们...活的新篇章！😊'}, input_type=dict]\n For further information visit https://errors.pydantic.dev/2.9/v/missing", "status": 400 } ``` if set response_mode to "streaming", it can work,
yindo added the 🐞 bug label 2026-02-21 18:22:44 -05:00
yindo closed this issue 2026-02-21 18:22:44 -05:00
yindo commented 2026-02-21 18:22:44 -05:00
Author
Owner
Copy Link
Copy Source

@dosubot[bot] commented on GitHub (Jan 23, 2025):

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

I found a similar unsolved discussion titled "Help：agent not support blocking mode in restful api，why?" which might be related to the issue you're experiencing [1].

The error message you're encountering indicates validation errors for the AssistantPromptMessage model. Specifically, it seems that the content field is expected to be a valid string, but a list is being provided instead. Additionally, a required field within the content is missing.

To resolve this, ensure that the content field in your request is a valid string and that all required fields are included. If switching to "streaming" mode works, it might be due to differences in how the modes handle input validation. You may need to adjust the input format or structure when using "blocking" mode to meet the validation requirements.

To continue talking to Dosu, mention @dosu.

Help Dosu learn! Give it feedback: Great Response | Irrelevant Answer | Incorrect Sources | Too Verbose | Hallucination | Other

@dosubot[bot] commented on GitHub (Jan 23, 2025): <!-- Greeting --> Hey @arzen! I'm here to help you with any bugs, questions, or contributions you have for our project. Let's tackle this issue together! <!-- Answer --> I found a similar unsolved discussion titled "[Help：agent not support blocking mode in restful api，why?](https://github.com/langgenius/dify/discussions/7805)" which might be related to the issue you're experiencing <sup>[[1]](https://github.com/langgenius/dify/discussions/7805)</sup>. The error message you're encountering indicates validation errors for the `AssistantPromptMessage` model. Specifically, it seems that the `content` field is expected to be a valid string, but a list is being provided instead. Additionally, a required field within the `content` is missing. To resolve this, ensure that the `content` field in your request is a valid string and that all required fields are included. If switching to "streaming" mode works, it might be due to differences in how the modes handle input validation. You may need to adjust the input format or structure when using "blocking" mode to meet the validation requirements. <!-- Dosu Comment Footer --> *To continue talking to [Dosu](https://dosu.dev), mention @dosu.* --- <sup>Help Dosu learn! Give it feedback: [Great Response](https://app.dosu.dev/response-feedback/9e24259e-6a67-4711-9c7a-78d55311e73d?feedback_type=great_response) | [Irrelevant Answer](https://app.dosu.dev/response-feedback/9e24259e-6a67-4711-9c7a-78d55311e73d?feedback_type=irrelevant_answer) | [Incorrect Sources](https://app.dosu.dev/response-feedback/9e24259e-6a67-4711-9c7a-78d55311e73d?feedback_type=incorrect_sources) | [Too Verbose](https://app.dosu.dev/response-feedback/9e24259e-6a67-4711-9c7a-78d55311e73d?feedback_type=too_verbose) | [Hallucination](https://app.dosu.dev/response-feedback/9e24259e-6a67-4711-9c7a-78d55311e73d?feedback_type=hallucination) | [Other](https://app.dosu.dev/response-feedback/9e24259e-6a67-4711-9c7a-78d55311e73d?feedback_type=other)</sup>
yindo commented 2026-02-21 18:22:44 -05:00
Author
Owner
Copy Link
Copy Source

@crazywoola commented on GitHub (Jan 23, 2025):

Can you share the configuration of the LLM node.

@crazywoola commented on GitHub (Jan 23, 2025): Can you share the configuration of the LLM node.
yindo commented 2026-02-21 18:22:44 -05:00
Author
Owner
Copy Link
Copy Source

@hieheihei commented on GitHub (Jan 25, 2025):

When using Qwen-VL-Max in blocking mode, I also encountered this problem.

@hieheihei commented on GitHub (Jan 25, 2025): When using Qwen-VL-Max in blocking mode, I also encountered this problem.
Sign in to join this conversation.
No Branch/Tag Specified
Branches Tags
Labels
Clear labels
Knowledge Pipeline
Proposal
WIP
cloud
dependencies
feat:webapp
good first issue
outdated
performance
pull-request
Mirrored from GitHub Pull Request
 python:uv
refactor
size:L
stale
status: accepting prs
status: blocked
status: in discussion
stt & tts
vulnerablity
web
wont-fix
🌊 feat:workflow
🌚 invalid
🐞 bug
👻 feat:rag
💪 enhancement
📚 documentation
🔨 feat:tools
🙋‍♂️ question
🙏 help wanted
🤔 cant-reproduce
🤖 feat:agent
No Label 🐞 bug
Milestone
No items
No Milestone
Projects
Clear projects
No project
Assignees
Clear assignees
yindo
No Assignees
1 Participants
Notifications
Due Date
No due date set.
Dependencies

No dependencies set.

Reference: langgenius/dify#7860
Delete Branch "%!s()"

Deleting a branch is permanent. Although the deleted branch may continue to exist for a short time before it actually gets removed, it CANNOT be undone in most cases. Continue?