How can I use cast() in an expression to cast something to an array of a CDT? I

Jason Ruvinsky

Certified Senior Developer

over 11 years ago

How can I use cast() in an expression to cast something to an array of a CDT? I can cast to a single version of the CDT with cast('type!{namespace}type-name',{fieldName:ri!fieldName}) How can I do this with multiples?

I've been browsing the docs, if there is a good page that explains this I would appreciate the pointers. I think that cast() documentation could be enhanced with some additional examples, too. Thanks!...

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0 Patty Isecke
Appian Employee
over 11 years ago

Can you use the apply() function to cast each element in your array?
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0 Jason Ruvinsky
Certified Senior Developer
over 11 years ago

As an example: I have a Rule that takes an array of a CDT as a parameter, however I have to specify "Any Type" for the parameter. If I want to explicitly cast it to the array of the CDT before using it in the rule, is there a way to do this? I could do it for a singular CDT as

=with(a:cast('type!{namespace}type-name',{ri!myCDTParameter}), expression_that_uses_the_cdt)
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0 robbier over 10 years ago

This is pretty much the same issue that I just posted a question about..was there ever any resolution to this?
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0 Jason Ruvinsky
Certified Senior Developer
over 9 years ago

It looks like in Appian 7.9 you can now explicitly declare CDTs as the inputs in a rule, so you don't need to use "Any Type" any longer.

I'm not sure about casting an array of a type, although you can use typeof() to cast to the type of something you know is what you want.
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