Array of documents in constant

Question

I would like to create a constant LIST_OF_CATEGORY_AVATARS which will contain all the images (at least their IDs) from my images folder. 
 This is the case with my excercise interface:

The wanted result is: if I select developer category, automatically show me the developer category avatar below. If I select Analyst category, automatically show me the analyst category avatar below etc. 
 I believe I need to do these things: 
 - create constant that will represent content of my images folder (even though it looks to me that this cannot be done by with constant as content of that folder will change at some point) 
 - create expression rule on image component that will calculate which image to show depending on category rule input 
 What is the best way to create this connection between categories and images? Do I need the constant at all and does it have to be defined in a manner that I explicitly write down all the image document IDs in it?

Mike Schmitt · Accepted Answer

For the constant-based solution, I don't believe there's any easy way to work around the issue of having to update the constant to account for the added images. I would almost suggest you instead consider using an expression rule where you feed in a folder ID and it spits out the list of files found within (see getdocumentsfromfolder() and similar OOB functions).

Array of documents in constant

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