Build list attribute by compressing existing one in FME
Geographic Information Systems Asked by pfadenhw on February 25, 2021
I currently have an attribute table that is exploded – attribute A is repeated for each unique value of attribute B. But I want to "compress" attribute A and change attribute B to a list – so that the new table has only unique values of A and all of the corresponding unique values for B are complied in a comma delimited list attribute (so they’re all in the same cell).
One Answer
I think the Aggregator transformer will do what you need here. Set it up to aggregate with a Group-By on attribute A, and attribute B is the "Attribute to Concatenate"
With that you'll get a separate feature for each unique A value, with all of the B values in a comma-separated list.
I'm not sure if you wanted a real FME list, or just a plain attribute with a comma-delimited list. My version is just a plain attribute, but to get an FME style list, just check the box for Generate List.
Here's the results. I'm hoping this is what you wanted:
Correct answer by Mark Ireland on February 25, 2021
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