Error Handling Conventions changed?

[brandon.bowersox-johnson]

Hi Dev Forum,

I see that the Requisition Service responds with a JSON error message that does not follow our documented conventions. JSON and links below with details.

Is there a reason we changed our convention? Do we need to either update our convention or go back and update Requisition Service to follow the pre-existing convention?

JSON today from a Requisition Service 400 Bad Request:

{

    "requisitionLineItems": "requisition.error.validation.reasonNotInRequisitionReasonList: Requisition cannot be saved because of adjustment reason with id d9aa0af6-f7f8-4aab-908f-15c660493be5 not being present on the list of allowed reasons."

}

Error Handling Convention JSON:

{

  "message" : "Action prohibited because user does not have permission at the facility",

  "messageKey" : "requisition.error.prohibited.noFacilityPermission"

}

OpenLMIS Error Handling Convention:

http://docs.openlmis.org/en/latest/conventions/errorHandling.html#how-the-api-responds-with-validation-error-messages

Perhaps the reason for changing the JSON structure was to allow an Array of multiple errors returned on a single request. Our conventions document still has that flagged under "Future: Arrays of Messages" as something we need to establish a convention for. If we are going to make a convention for that, I would still suggest we want the messageKey and the message string as separate properties in the JSON so that API consumers can get each piece without parsing/regex'ing a string.

-Brandon

[Paweł Albecki]

Hi,

I don't think any convention was changed. The pattern for requisition validation errors was there from the beginning: https://github.com/OpenLMIS/openlmis-requisition/commit/64e31f05ee4c3f44950ea586a09c441f6ab429e7. I don't know why it wasn't changed yet to follow conventions, maybe because convention has missing part about array of errors. In April, we started a discussion in Dev Group: https://groups.google.com/forum/#!topic/openlmis-dev/iwGo2mLR3wk. Maybe it's a good time to follow-up.

Paweł

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Paweł Albecki
Software Developer
palb...@soldevelo.com

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