Table of Contents
The Video
Introduction
You are creating an ArcGIS Pro custom tool with ArcPy and you want to allow the user to select from a dropdown list or type in free-text for the input. This is now possible out-of-the-box and requires a small bit of tinkering with the tool properties Validation tab.
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In your custom script tool. Add the below to the updateMessages() function in the Validation tab. This will clear the error message you receive when you apply free-text to an input that has a list of values as a dropdown. Check out the video above for more information.
def updateMessages(self):
# Modify the messages created by internal validation for each tool
# parameter. This method is called after internal validation.
if self.params[0].altered and self.params[0].value:
self.params[0].clearMessage()
return
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