I want to get the diff text between expression rule to integration some automation flow.
Do Appian exposed any API to support such?
Or is there any API could get object source by version?
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Use an API to export the package and after that read the contents of the package (zip file) and compare the files.
It's a little bit complicated, but as Stpehan said, there is no api with that functionality.... you'll have to create it from scratch
> export the package and after that read the contents of the package (zip file) and compare the files.
I want to compare the diffs for same object but in different version, how to achieve this by exporting package?
WHen you export the package, the objects will have the same id.. open files with the same name (*.xml), parse the xml, and compare the contents of the files. YOU ahve to check wiich nodes you want to compare.... BUt it's quite complicated
But ... how do you get other versions? A package only contains the latest version.