REST API: Process Instantiation problem

Q&A
1

Hi, I’m trying to instantiate a process via rest api
“/API/bpm/process/”+process_definition_id+“/instantiation”

and json:

{
‘description’: ‘test’,
‘supplierIds’: 6,
‘summary’: ‘test’
}

but I get this error:
Exception: HTTP STATUS: 400 {“exception”:“class org.bonitasoft.engine.bpm.contract.ContractViolationException”,“message”:“Error while validating expected inputs”,“explanations”:[“6 cannot be assigned to INTEGER”]}

someone can help me?
thanks
Claudio

2

You are trying to instantiate the process named “Procurement request” that is part of the Procurement example.

The contract of this process expect three inputs:

  • summary: a text
  • description: a text
  • supplierIds: an array of number (JSON) translate to a List

So your JSON is currently invalid. A valid equivalent would be:

{
‘description’: ‘test’,
‘supplierIds’: [6],
‘summary’: ‘test’
}

Actually the error message is misleading. Instead of “6 cannot be assigned to INTEGER” it should be “6 cannot be assigned to List of INTEGER”. I open a request to get that fixed.

3

Hello
I have seen similar error in my Processes before.
I stopped using integer and started using strings to store all values.
But i have seen that the variable of type double works better.
Usually I save all numeric data as double.
Try and see if double is allowed.
Also make sure the datatype in your contract is formatted correctly.

regards

4

If you can share the process .bos file (using Google Drive, Dropbox,…) I’d like to reproduce the issue.

Thanks

5

the bos file is https://github.com/Bonitasoft-Community/procurement-example

6

thx so much antoine!

7

You’re welcome.

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