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'NoneType' object is not iterable while adding DALL-E #5084

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opened 2026-02-21 18:09:18 -05:00 by yindo · 1 comment
yindo commented 2026-02-21 18:09:18 -05:00
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Originally created by @ChenZhongPu on GitHub (Aug 16, 2024).

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

0.7

Cloud or Self Hosted

Self Hosted (Docker)

Steps to reproduce

Dify is self-hosted using Docker in a Linux machine without public IP, so I used port forwarding techs to access it with a customized domain.

The chatbot works fine with a proxy OpenAI API endpoint, but it reports 'NoneType' object is not iterable while adding DALL-E in tool tab. I also checked the web console:

XHRPOST
https://xxx.com/console/api/workspaces/current/tool-provider/builtin/dalle/update
Uncaught (in promise)
Response { type: "basic", url: "https://xxx.com/console/api/workspaces/current/tool-provider/builtin/dalle/update", redirected: false, status: 400, ok: false, statusText: "BAD REQUEST", headers: Headers(11), body: ReadableStream, bodyUsed: false }

where xxx.com is my domain.

✔️ Expected Behavior

No response

❌ Actual Behavior

No response

Originally created by @ChenZhongPu on GitHub (Aug 16, 2024). ### 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 0.7 ### Cloud or Self Hosted Self Hosted (Docker) ### Steps to reproduce Dify is self-hosted using Docker in a Linux machine without public IP, so I used port forwarding techs to access it with a customized domain. The chatbot works fine with a proxy OpenAI API endpoint, but it reports **'NoneType' object is not iterable** while adding DALL-E in `tool` tab. I also checked the web console: > XHRPOST https://xxx.com/console/api/workspaces/current/tool-provider/builtin/dalle/update Uncaught (in promise) Response { type: "basic", url: "https://xxx.com/console/api/workspaces/current/tool-provider/builtin/dalle/update", redirected: false, status: 400, ok: false, statusText: "BAD REQUEST", headers: Headers(11), body: ReadableStream, bodyUsed: false } where `xxx.com` is my domain. ### ✔️ Expected Behavior _No response_ ### ❌ Actual Behavior _No response_
yindo added the 🐞 bug label 2026-02-21 18:09:18 -05:00
yindo closed this issue 2026-02-21 18:09:18 -05:00
yindo commented 2026-02-21 18:09:19 -05:00
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@dosubot[bot] commented on GitHub (Aug 16, 2024):

@ChenZhongPu Hello there! I'm here to help you with any bugs, questions, or contributions you have for the Dify repository. Let me know how I can assist you!

To resolve the "'NoneType' object is not iterable" error when adding DALL-E in the tool tab of a self-hosted Dify version 0.7 using Docker, ensure that the credentials dictionary passed to the _validate_credentials method is not None and contains the necessary keys and values.

Here's the relevant code snippet from dalle.py:

class DALLEProvider(BuiltinToolProviderController):
    def _validate_credentials(self, credentials: dict[str, Any]) -> None:
        try:
            DallE2Tool().fork_tool_runtime(
                runtime={
                    "credentials": credentials,
                }
            ).invoke(
                user_id='',
                tool_parameters={
                    "prompt": "cute girl, blue eyes, white hair, anime style",
                    "size": "small",
                    "n": 1
                },
            )
        except Exception as e:
            raise ToolProviderCredentialValidationError(str(e))

Make sure that when you are adding DALL-E, the credentials dictionary is properly populated. For example:

credentials = {
    "api_key": "your_api_key_here",
    "other_required_field": "value"
}

If credentials is None or missing required fields, the fork_tool_runtime method will fail, leading to the "'NoneType' object is not iterable" error. Ensure that the credentials dictionary is correctly passed and contains all necessary information [1].

Additionally, the required field in the credentials dictionary for the DALL-E tool is openai_api_key:

credentials_for_provider:
  openai_api_key:
    type: secret-input
    required: true
    label:
      en_US: OpenAI API key
      zh_Hans: OpenAI API key
      pt_BR: OpenAI API key
    help:
      en_US: Please input your OpenAI API key
      zh_Hans: 请输入你的 OpenAI API key
      pt_BR: Please input your OpenAI API key
    placeholder:
      en_US: Please input your OpenAI API key
      zh_Hans: 请输入你的 OpenAI API key
      pt_BR: Please input your OpenAI API key

Ensure that you provide the openai_api_key in the credentials [2].

To continue talking to Dosu, mention @dosu.

@dosubot[bot] commented on GitHub (Aug 16, 2024): <!-- Greeting --> @ChenZhongPu Hello there! I'm here to help you with any bugs, questions, or contributions you have for the Dify repository. Let me know how I can assist you! <!-- Answer --> To resolve the "'NoneType' object is not iterable" error when adding DALL-E in the tool tab of a self-hosted Dify version 0.7 using Docker, ensure that the `credentials` dictionary passed to the `_validate_credentials` method is not `None` and contains the necessary keys and values. Here's the relevant code snippet from `dalle.py`: ```python class DALLEProvider(BuiltinToolProviderController): def _validate_credentials(self, credentials: dict[str, Any]) -> None: try: DallE2Tool().fork_tool_runtime( runtime={ "credentials": credentials, } ).invoke( user_id='', tool_parameters={ "prompt": "cute girl, blue eyes, white hair, anime style", "size": "small", "n": 1 }, ) except Exception as e: raise ToolProviderCredentialValidationError(str(e)) ``` Make sure that when you are adding DALL-E, the `credentials` dictionary is properly populated. For example: ```python credentials = { "api_key": "your_api_key_here", "other_required_field": "value" } ``` If `credentials` is `None` or missing required fields, the `fork_tool_runtime` method will fail, leading to the "'NoneType' object is not iterable" error. Ensure that the `credentials` dictionary is correctly passed and contains all necessary information <sup>[[1]](https://github.com/langgenius/dify/blob/main/api/core/tools/provider/builtin/dalle/dalle.py)</sup>. Additionally, the required field in the `credentials` dictionary for the DALL-E tool is `openai_api_key`: ```yaml credentials_for_provider: openai_api_key: type: secret-input required: true label: en_US: OpenAI API key zh_Hans: OpenAI API key pt_BR: OpenAI API key help: en_US: Please input your OpenAI API key zh_Hans: 请输入你的 OpenAI API key pt_BR: Please input your OpenAI API key placeholder: en_US: Please input your OpenAI API key zh_Hans: 请输入你的 OpenAI API key pt_BR: Please input your OpenAI API key ``` Ensure that you provide the `openai_api_key` in the credentials <sup>[[2]](https://github.com/langgenius/dify/blob/main/api/core/tools/provider/builtin/dalle/dalle.yaml)</sup>. <!-- Dosu Comment Footer --> *To continue talking to [Dosu](https://dosu.dev), mention @dosu.*
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Reference: langgenius/dify#5084
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