Stream: hapi
Topic: Conditional Create Issue/Bug?
Brian Reinhold (May 12 2021 at 12:56):
I have an identifier in an Observation resource that looks as follows:
"identifier": [
{
"value": "B4E782FFFF4B4A10-VL-testing-Ren-urn:oid:2.2.2.333-150364-41.34-6048-20210427133226.444+0800"
}
]
The search on this identifier works fine. However, when I have a Conditional Create in a transaction bundle
"request": {
"method": "POST",
"url": "Observation",
"ifNoneExist": "identifier=B4E782FFFF4B4A10-VL-testing-Ren-urn:oid:2.2.2.333-150364-41.34-6048-20210427133226.444+0800"
}
It does not work and now I have multiple resources with identical content loaded on the server.
However, if my resource has a 'system' entry as well as a 'value' entry, then the conditional create works. Am I doing something wrong?
Just in case the problem is due to the lack of a system field I added one to the identifier, gave it a constant value, and added that to the conditional create so it mirrored the Device case. It still failed to work.
Brian Reinhold (May 14 2021 at 11:36):
Turns out (thanks James Agnew) that my identifier has a '+' sign in it which is okay but when used in the URL of the 'ifNoneExist' field, the '+' sign needs to be escaped. I did not know this but there are two ways to escape a 'space' in a URL, the common %20 but also a '+' sign. Since I did not escape the plus sign, HAPI FHIR decoded the URL and the '+' sign became a 'space'. Thus the conditional create did not find such an identifier.
The solution was to escape the '+' sign (%2B).
Last updated: Apr 12 2022 at 19:14 UTC
