Saving Data from List of data using CDT in a localvariable or input rule

hi everyone

i need help to understand something with saving an item in variable which use CDT , 

i create a variable with a CDT ( type document that i defined ) and i created a list which bring me some data , which is also use CDT

now i create a for each because i  want to to save data each time with the function save!() , but after  that i click on test rule it doesnt show nothing everythin is null . 

what am i doing wrong ??? if i using a rule input i have the same issue ... 

what is the way to get the data in another variable .

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  • I agree with the earlier commentors - what is your input state, and what is your desired output? 

    Expression rules are powerful but you have to think of them as a transformation from input X to output Y.  That can be simple (think of the rule "upper()", if input is "a", then output will be "A"), or more complicated (a query, where your input is perhaps a few different filters, and the output is an array of data from the DB which matches those filters).

    In your screenshot I can neither tell what your input will be in a real world use case (a single instance of "document"?), nor what your desired output will be.  Knowing these is pretty much a requirement before even starting on creating a workable expression rule.

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  • I agree with the earlier commentors - what is your input state, and what is your desired output? 

    Expression rules are powerful but you have to think of them as a transformation from input X to output Y.  That can be simple (think of the rule "upper()", if input is "a", then output will be "A"), or more complicated (a query, where your input is perhaps a few different filters, and the output is an array of data from the DB which matches those filters).

    In your screenshot I can neither tell what your input will be in a real world use case (a single instance of "document"?), nor what your desired output will be.  Knowing these is pretty much a requirement before even starting on creating a workable expression rule.

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