Accessing Parameters in Connect-REST Rule
Until now, all my REST integrations involved passing variable data in the request bodies. Any headers I needed to pass didn't vary. So I used to use Map from = Constant and simply enter value in Map from Key.
Lately, my requirements have changed. I need to be able to pass Parameter Page from my Data Page to my Connect-REST rule and then use those values within the rule. However, I'm unable to figure it out. Syntax Param.MyParamValue doesn't work regardless of whether I use Map From = Constant / Clipboard - and I agree it should not. On the other hand, how do I solve my problem?
Ideally I want to pass a key as parameter to Connect-REST and using that key I could use a Data Page to retrieve whatever variable data I want. I cannot even refer to a Data-Page either on the rule form, but at this time it is less of an issue.
One way I'm thinking is to add properties at the root of my Pega generated API request class. Then I can chose Map From = Clipboard and access as .request.MyHeaderValue. That'll do it. However, I don't think it is portable solution. If I upgrade my connector and Pega regenerates my class I will have to define MyHeaderValue property again.
Someone please give me a better option. At this time, I'm concluding the ability of passing Parameters to Connect-REST rule is useless if I cannot use Param.MyParamValue syntax anywhere within the form. Not that it should matter, but I am using version 8.6 PE.
Until now, all my REST integrations involved passing variable data in the request bodies. Any headers I needed to pass didn't vary. So I used to use Map from = Constant and simply enter value in Map from Key.
Lately, my requirements have changed. I need to be able to pass Parameter Page from my Data Page to my Connect-REST rule and then use those values within the rule. However, I'm unable to figure it out. Syntax Param.MyParamValue doesn't work regardless of whether I use Map From = Constant / Clipboard - and I agree it should not. On the other hand, how do I solve my problem?
Ideally I want to pass a key as parameter to Connect-REST and using that key I could use a Data Page to retrieve whatever variable data I want. I cannot even refer to a Data-Page either on the rule form, but at this time it is less of an issue.
One way I'm thinking is to add properties at the root of my Pega generated API request class. Then I can chose Map From = Clipboard and access as .request.MyHeaderValue. That'll do it. However, I don't think it is portable solution. If I upgrade my connector and Pega regenerates my class I will have to define MyHeaderValue property again.
Someone please give me a better option. At this time, I'm concluding the ability of passing Parameters to Connect-REST rule is useless if I cannot use Param.MyParamValue syntax anywhere within the form. Not that it should matter, but I am using version 8.6 PE.
At this time I will even accept ONE example of how to access Connect-REST parameter value *anywhere* on the Connect-REST rule form.
Maantic Inc.
IN
I am assuming that you are calling your Connect-REST from a Data Page.
- Just make sure that you set your parameter in the request data transform.
- Select "Pass current parameter page" in both the Connect-REST and the Request Data Transform parameter window.
- In the Connect-REST rule where you want to pass this parameter set that "Map From" to clipboard and pass the value as Param.ABC
You should be able to pass parameters to your Connect-REST rule.
Updated: 17 Aug 2021 18:22 EDT
Booz Allen Hamilton
US
I am passing Current Parameter Page to Connect-REST and Request Data Transform. This is not the problem. The problem is I need to be able to specify header value. Third party API I'm consuming is asking some data to be sent as an HTTP header on a HTTP Get.
In the Connect-REST rule where you want to pass this parameter set that "Map From" to clipboard and pass the value as Param.ABC
I tried this - it does not work. Param page is not a clipboard page to the best of my knowledge. In any case I get Client Error at run time if I refer to Param.MyValue.
So I don't know if I'm able to pass parameters to Connect-REST rule from my Data Page. All I'm saying is when I'm trying to use it on the Methods tab it is not working. I hope someone can try this and let me know what I'm missing.
PLEASE - one person somewhere verify for me Parameters defined on Parameters tab are *not* usable within Connect-REST rule.
PS I hardcoded parameter value on the Parameters tab to rule out any external issues. Param.XXX within Connect-REST does not work for me on the Method tab trying to pass in value of header.
PPS Using a Data-Page lookup with / without = in front as in DPage[..].value and =DPage[...].value also does not work on Method Tab. Does not work on Parameter tab. NOTHING works.
Maantic Inc.
IN
In that case I am not able to understand the problem here. Because I have passed parameters in the header (in method tab) , used Map from as Clipboard and passed the value as Param.ABC and it has always worked for me fine.
Can you please provide screenshots if possible and may be someone can help if that is not the case.
Updated: 18 Aug 2021 9:41 EDT
Booz Allen Hamilton
US
My screen shot looks exactly like yours. I know it seems unbelievable, but like I said, I hard coded default values on the Parameters tab of the rule to rule out any other issues. When I Trace, the parameter value is not picked up .The connector then actually seems to pass "Param.XXX" as a string value.
Please let me know what version you are using. I'm using Personal Edition 8.6.
PS - If you can also confirm either on Method tab directly OR setting Param on Parameters tab with a Data Page also works would really appreciate it.
Booz Allen Hamilton
US
I found my problem...I think...it is probably a Personal Edition thing. Will try my best to explain it.
I used to have a parameter X on the REST connector and parameter Y on data page.
I removed X from Rest Connector and defined Y instead.
I checked "Pass Parameter Page" on Data Page form for Rest Connector. When I uncheck, I still see X on the REST connector. Basically Data Page has permanent memory of Parameter X of the REST connector. I have refreshed 10 times, cleared all browser history. logged off / on. I cannot get the Data Page to forget X existed.
So this is a ridiculous problem to have but if anyone has a suggestion?