Workflow path depending on User's Input

Carrot_WinWin

Hi Team, 

I'm currently using the drop down tool for user to choose the column they want to process. And I want to enable the [None] option for user. but I found it would be very hard to deal with the following workflow if the user choose [None]. 

Is there any way I can realize the logic like "if the user choose a column from the dropdown tool, then process this column into the following steps, but if the user choose [None] from dropdown tool, then enter into another path"?

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bgreedy

You could use control containers to disable/enable parts of the workflow depending on a condition, hopefully the workflow attached helps

I did try initially to hook-up some action tools to the containers directly, but alteryx was having trouble recognizing when none was selected. 

Workflow path depending on User's Input.yxzp