Model API QA: Errors met when testing model training and replacing loaded model

Problem description:

1. Testing /model/train endpoint with the example in the docs leads to a YAML validation error (400 Bad Request error:

"The request body does not contain valid YAML. Error: Failed to validate YAML. Please make sure the file is correct and all mandatory parameters are specified. Here are the errors found during validation:\n  in Line 1:\n      Value 'b'- intent: greet\\\\n examples: |\\\\n - hey\\\\n - hello\\\\n - hi'' is not a list. Value path: '/nlu'"

1. Testing PUT /model endpoint with this request body (existing file on disk) leads to 400 Bad Request:

{
"model_file": "/models/20211110-091805-impulsive-birth.tar.gz"
}

It seems not to be able to identify the path given, this is the response error message: "Agent with name '/models/20211110-091805-impulsive-birth.tar.gz' could not be loaded." The debug log shows this user warning: UserWarning: No valid configuration given to load agent. Agent loaded with no model!

[ancalita]

@ancalita I think the model replacement 400s because of the absolute path - was the model really at the root of the machine?

@melindaloubser1 Oh that could have been the problem, not using absolute path, because indeed the models were not really at the root directory. But probably this could be made clearer in the docs (to use absolute paths) for those naive folks like myself copy-pasting examples 😅

[melindaloubser1]

@tayfun Could you get the model replacement to work? Since the docs change the path instructions only, seems the endpoint itself may not be behaving as it ought?