How to use pattern variable replacement in SAP PO/PI adapter

[former_member293707]

I have a scenario where I post from SAP ABAP via a proxy to an API endpoint.

In this case, I have to update the user. The URL looks like this https://company.com/api/v2/users/<user_id>;
And the payload for example like this:
{
"user_id": "12344556",
"name": "Edwin",
"nickname": "Edwin",
}

I have set up a REST receiver like this, and the call to the server is indeed to https://company.com/api/v2/users/12344556

But, the receiving party is complaining that user_id should not be in the payload!

So bottom question, how do I get the user_id from the payload and put in the URL (which works), but how to prevent it for being send to the receiver?

[fprokopiuk]

Hi Edwin,

So you want to send request with user_id in url and payload like below?

{
"name": "Edwin",
"nickname": "Edwin",
}

[former_member293707]

Hi Filip,

Yes, exactly!

[fprokopiuk · Accepted solution]

What you can do is:

1. Sender channel: put user_id to Adapter-Specific Attribute, you can either choose predefined one or choose own name.
2. Sender channel: Map json to XML.
3. Mapping: prepare two structures for mapping one with and the other without user_id, map the one with id to the one without.
4. Receiver channel: Map XML to json.
5. Receiver channel: Read user_id from ASMA with the same id as you've chosen in sender and put into URL.

Maybe there are some easier ways but this should work.

[former_member293707 · Accepted solution]

Hi Filip,

Thanks for your suggestion! This really helped a lot.
I have taken a little different approach: I added the user_id to the ASMA with a UDF in the mapping.

[fprokopiuk · Accepted solution]

Great! I'm happy that I could help 🙂