Model APIs: “TypeError: build_error_response() missing 1 required positional argument: 'model_time_ms'” error when sending a POST request

Version/Environment (if relevant):

This applies to all versions of Domino.

Issue:

The Model API works on the Tester tab. However, it doesn’t work when you hit the Model API with a POST request. It does not accept the POST request from the endpoint.

The Instance logs show errors indicating that there is a missing argument (model_time_ms) to the function build_response_error():

ERROR in app: Exception on /model [POST]

else (harness_lib.build_error_response('"data" or "parameters" must be supplied'), 400)
TypeError: build_error_response() missing 1 required positional argument: 'model_time_ms'

Root Cause:

The error indicates that the request body is not in the correct format.

Resolution:

Change the format to the JSON document in the form either:

{
  "data": {
    ...
  }
}

or

{
   "parameters": [
     ...
   ]
}

Notes/Information:

For more about Model API's:

• Host Models as REST APIs
• Model APIs section of Domino University's Publishing in Domino