Compare Data Changes in CDT

@Shashank please find the below shared component forum.appian.com/.../summary
hope this is helpful

Yes above one helped you to get changed attributes data from your CDTs. but your CDTs should contains primitive data types and shouldn't contain array variables

It also will not work if the CDT is nested

@shashankb Is it temporary or are you trying to persist it to the database? If it's later, did you consider delegating it to the database?

@sikhivahans , it is temporary only , i am not considering persisting the data for now as @chetany mentioned , the plugin is not able to handle nested cdts , I am still trying to figure out a way for that , any suggestion on that part also would be helpful , according to my requirement , the rule should be a generic one , which can handle any type of CDT and get the differences in data ( latest and the very previous one only)

@Bolluru Mahesh Sachin Anand , thanks for the shared component , it was helpful , but i am still trying to figure out a way to handle nested CDTs

Using some ideas from forum.appian.com/.../e-238884 you should be able to implement a recursive expression to handle nested CDTs. First expression gets all field names. Then you create an expression that is applied to all fields in the CDT. It checks if the datatype is a multiple and/or a CDT. If yes, it calls the first expression on the sub structure.

Did some small tests. It might not work for all cases, but can be a start:

CdtDiff(cdt1, cdt2):
=with(
local!fieldNames: apply(xpathsnippet(_, "name(*)"), xpathsnippet(toxml(ri!cdt1), "/*/*")),
apply(rule!CdtDiffField(ri!cdt1, ri!cdt2, _), local!fieldNames)
)

CdtDiffField(cdt1, cdt2, fieldName):
=with(
local!fieldOneType: runtimetypeof(index(ri!cdt1, ri!fieldName, null)),
local!fieldTwoType: runtimetypeof(index(ri!cdt2, ri!fieldName, null)),
local!fieldOneExits: tostring(index(ri!cdt1, ri!fieldName, "x_#")) <> "x_#",
local!fieldTwoExits: tostring(index(ri!cdt2, ri!fieldName, "x_#")) <> "x_#",
if(and(local!fieldOneExits, local!fieldTwoExits, local!fieldOneType = local!fieldTwoType),
if(local!fieldOneType < 1000,
{field: ri!fieldname, same: ri!cdt1[ri!fieldName] = ri!cdt2[ri!fieldName]},
{field: ri!fieldname, children: apply(rule!CdtDiff(_,_), merge(ri!cdt1[ri!fieldName], ri!cdt2[ri!fieldName]))}
),
false
)
)

@stefanh , thanks a lot it was very helpful, the "xpathsnippet" would be of great use to me , never thought of xpathsnippet for getting the field names

You are welcome :-)