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Instance Manager - how to reference?


Level 4
hi 🙂

i have a dynamic subform, which i am adding and deleting (users).

the subform has such information as name, address, phone etc.

is there a way for me to reference last (or second, or third) instance of that subform, and get the last address that has been added/deleted?

i can't seem to find a way to do it.

6 Replies


Level 10
The innstanceManager has a count property which will give you how many occurances of that subform that exists. Also if you know which occurance that you want to look at you can address the field by using the full somExpression and giving the occurance number on the subform. Something like this:


Note that the [] will cause a problem in Javascript (they are used to indicate array elements) hence you need this syntax in javascript:


Depending on where your code is runnning, if it is on a field level event you can get the occurance that the object is in by using this.parent.index

Hope this helps


Level 4

when I do this:


it works, but when i put in the count, instaed of 1


i get "Malformed SOM expression" error....


Level 10
The quotes signify a string. count needs to be a calculated value so you woudl do smething like this:

xfa.resolveNode("form1.page1.dynamicSubFormName[" + count + "]").address.rawValue

I assume count is a variable that contains the occurance that you want to test.


Level 4
that is correct....

but i still don't understand what i am doing wrong.....

this is my code now:

var myCount = userSub.instanceManager.count-1;


i'm still getting the "Malformed SOM expression" error....


Level 10
The issue is that myCount is not getting resolved beacuse it is inside of the quotes and is being interpretted as a string. I believe the expression should be:

app.alert(xfa.resolveNode("form1.formPage.mainSub.userSub[" + myCount + "]").userName.rawValue);


Level 4
yeay! it's working, thanks!

sorry, i didn't realize that " + myCount + " was the exact code i was to use 🙂

Thanks again!