.check([status.is](http://status.is)(200))
)
.pause(1)
```
If needed, you can save a new `rqId` whenever you want.
---
### Author:  [@Richard\_Livingstone](https://community.gatling.io/u/Richard_Livingstone)
#### Post date: [March 17, 2021, 4:29pm UTC](https://community.gatling.io/t/unique-post-param-value-for-every-call/6019/5 "2021-03-17T16:29:50Z")
Many thanks. I think this will do what I need. Scala is great - never used it before, I’ve done most of my development in Java, C++, C and JS to date.
---
### Author:  [@Richard\_Livingstone](https://community.gatling.io/u/Richard_Livingstone)
#### Post date: [March 18, 2021, 9:24am UTC](https://community.gatling.io/t/unique-post-param-value-for-every-call/6019/6 "2021-03-18T09:24:56Z")
Hmm - not quite right yet. My code is :
def generateRqId = “MYLOADTEST\_” + Verification.randomAlpha(20)
val scn = scenario(“RSL”)
.exec(session =\> session.set(“rqId”, generateRqId))
.exec(
http(“MYLOAD”)
.post(“myurl”)
.formParam(“requestId”, “${rqId}”)
.formParam(“verify”, Verification.processIntoValue(“DATASTARTrequestid=${rqId}|otherstuff=xyz”))
.check(status.is(200))
.check(substring(“seqNumber=”).exists)
)
.pause(1)
Unfortunately, although it passes the right value as the form param requestId, it passes the literal ${rqId} into the method Verification.processIntoValue rather than the session value. If I separate it into “DATASTARTrequestid=” + “${rqId}” + “|otherstuff=xyz”, the same. So the form param verify ends up incorrect. That’s what I was meaning by using the same value in two places.
Apologies if this gets posted twice, I posted and it seems to have vanished 🙂
---
### Author:  [@sbrevet](https://community.gatling.io/u/sbrevet)
#### Post date: [March 18, 2021, 9:35am UTC](https://community.gatling.io/t/unique-post-param-value-for-every-call/6019/7 "2021-03-18T09:35:50Z")
`Verification.processInfoValue` is your own method, I guess.
And this is not aware of the session.
The code I provided use some scala magic to change `formParam("requestId", "${rqId}")` into `formParam("requestId", session => session.get("rqId"))` (in reality, there is something more complicated, but the idea is here).
So, in your case, you need to build your own value:
```auto
.formParam("verify", Verification.processIntoValue("DATASTARTrequestid=${rqId}|otherstuff=xyz"))
```
to something like:
```auto
.formParam("verify", Verification.processIntoValue(session => "DATASTARTrequestid=" + session("rqId").as[String] +|otherstuff=xyz"))
```
Source: [https://gatling.io/docs/current/session/session\_api/](https://gatling.io/docs/current/session/session_api/)
---
### Author:  [@Richard\_Livingstone](https://community.gatling.io/u/Richard_Livingstone)
#### Post date: [March 18, 2021, 10:55am UTC](https://community.gatling.io/t/unique-post-param-value-for-every-call/6019/8 "2021-03-18T10:55:51Z")
Cheers - I had to change to this:
.formParam(“verify”, session =\> Verification.getHash(“DATASTARTrequestid=” + session(“rqId”).as[String] +…
but it now does exactly what I need. Many thanks for your help. Impressed with Gatling - first time I’ve used it, easy to use and gather results.
---
### Author:  [@sbrevet](https://community.gatling.io/u/sbrevet)
#### Post date: [March 18, 2021, 11:05am UTC](https://community.gatling.io/t/unique-post-param-value-for-every-call/6019/9 "2021-03-18T11:05:02Z")
You’re right.
I edited the line directly in the mail and didn’t put the `session =>` in the good parentheses.
Good to know it works for you ^^
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