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Using the Field Mapping data type as a parameter for a script tool?

Question asked by shanetreed on Aug 21, 2019
Latest reply on Aug 22, 2019 by shanetreed

Hello,

 

I am trying to create a script tool, and I'd like to use the Field Mappings data type for my 2nd parameter (1st parameter is a Feature Class, Table, etc.).   It seems like this type of parameter should have the Obtained from property enabled, but I cannot find a data type, for use with the 1st parameter, that enables the Obtained from property.

 

While trying to troubleshoot the issue, I place code in the updateParameters validation function that logs debug messages to a text file.  When I try to find the data type of the Field Mappings parameter, using the type() function with self.params[1].value or self.params[1], I get: <type 'NoneType'>.

 

Can someone please explain how to use the Field Mapping data type with a script tool?  Specifically, I'd like to know how to populate the control associated with the Field Mappings data type.

 

Thank you

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