Troubleshooting of Ollama API: Difference between revisions
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(Created page with " Troubleshooting of [https://ollama.com/ Ollama] [https://github.com/ollama/ollama/blob/main/docs/api.md API] {{Raise hand | text = If you have any questions about the Ollama API, you can post them on the [https://github.com/ollama/ollama/issues Ollama GitHub Repository].}} == How to fix "json: cannot unmarshal object ..." == '''Error message:''' <pre> HTTP Error 400: {"error": "json: cannot unmarshal object into Go struct field ChatRequest.messages of type []api.Mess...") |
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HTTP Error 400: {"error": "json: cannot unmarshal object into Go struct field ChatRequest.messages of type []api.Message"} | HTTP Error 400: {"error": "json: cannot unmarshal object into Go struct field ChatRequest.messages of type []api.Message"} | ||
</pre> | </pre> | ||
'''Applicable Model:''' | |||
* {{kbd | key=gpt-oss:120b}} | |||
'''Solution''' | '''Solution''' | ||
| Line 15: | Line 19: | ||
Root Cause: Incorrect `messages` format. The API expects an array format, but a single object was being sent. | Root Cause: Incorrect `messages` format. The API expects an array format, but a single object was being sent. | ||
Incorrect Format: ❌ This is an object | Incorrect Format in PHP: ❌ This is an object | ||
<pre> | <pre> | ||
'messages' => ['role' => 'user', 'content' => $message] | 'messages' => ['role' => 'user', 'content' => $message] | ||
</pre> | </pre> | ||
Correct Format: ✅ This is an array containing an object | Correct Format in PHP: ✅ This is an array containing an object | ||
<pre> | <pre> | ||
'messages' => [['role' => 'user', 'content' => $message]] | 'messages' => [['role' => 'user', 'content' => $message]] | ||
| Line 29: | Line 33: | ||
This fix resolves the `"cannot unmarshal object into Go struct field ChatRequest.messages"` error. | This fix resolves the `"cannot unmarshal object into Go struct field ChatRequest.messages"` error. | ||
== Related links == | |||
* Forum: [https://www.reddit.com/r/ollama/ ollama] | |||
[[Category: Tools]] | [[Category: Tools]] | ||
Latest revision as of 10:46, 3 September 2025
If you have any questions about the Ollama API, you can post them on the Ollama GitHub Repository.
How to fix "json: cannot unmarshal object ..."[edit]
Error message:
HTTP Error 400: {"error": "json: cannot unmarshal object into Go struct field ChatRequest.messages of type []api.Message"}
Applicable Model:
- gpt-oss:120b
Solution
Root Cause: Incorrect `messages` format. The API expects an array format, but a single object was being sent.
Incorrect Format in PHP: ❌ This is an object
'messages' => ['role' => 'user', 'content' => $message]
Correct Format in PHP: ✅ This is an array containing an object
'messages' => [['role' => 'user', 'content' => $message]]
Explanation: The `messages` parameter must be an array of message objects, not a single message object. Each message object should contain `role` and `content` properties. The extra square brackets `[]` wrap the message object into an array, which matches the API's expected format.
This fix resolves the `"cannot unmarshal object into Go struct field ChatRequest.messages"` error.
Related links[edit]
- Forum: ollama