# Subcategories demo missing one explanation

**URL:** <https://community.glideapps.com/t/subcategories-demo-missing-one-explanation/21733>\
**Category:** Ask for Help\
**Created:** [January 26, 2021, 1:45am UTC](https://community.glideapps.com/t/subcategories-demo-missing-one-explanation/21733 "2021-01-26T01:45:41Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![belzoni](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/belzoni/32/20862_2.png) [@belzoni](https://community.glideapps.com/u/belzoni)\
**Post date:** [January 26, 2021, 1:45am UTC](https://community.glideapps.com/t/subcategories-demo-missing-one-explanation/21733/1 "2021-01-26T01:45:41Z")

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Continuing the discussion from [Help Using Categories and Subcategories](https://community.glideapps.com/t/help-using-categories-and-subcategories/1127/8):

There’s one thing I don’t understand about the demo linked above. When using the GSheet shared by @JackVaughan as the basis for a new Glide App, **Sheet 2 \> Parent 1** column is automatically made into a Relation Column. How/why?

Also, I can’t edit the Relation for that column, so I can’t even see how it’s relating to something else.

This is what it looks like before I’ve done anything to it. Can someone please explain? ![Screen Shot 2021-01-25 at 8.41.24 PM](https://us1.discourse-cdn.com/flex002/uploads/glideapps/original/3X/b/b/bbaa5e92f1d2e197d2a47eba83ee88de2067e03a.png)

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**Author:** ![Darren\_Murphy](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/darren_murphy/32/47326_2.png) [@Darren\_Murphy](https://community.glideapps.com/u/Darren_Murphy)\
**Post date:** [January 26, 2021, 2:21am UTC](https://community.glideapps.com/t/subcategories-demo-missing-one-explanation/21733/2 "2021-01-26T02:21:19Z")

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That’s not a relation, it’s an [array column](https://docs.glideapps.com/all/reference/data-editor/computed-columns/array-column).  
If you look at the source sheet, there are two columns named ‘Parent 1’ and ‘Parent 2’ respectively.  
Glide automagically converts those into an array column named ‘Parent’

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**Author:** ![Eric\_Penn](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/eric_penn/32/73888_2.png) [@Eric\_Penn](https://community.glideapps.com/u/Eric_Penn)\
**Post date:** [January 26, 2021, 5:31am UTC](https://community.glideapps.com/t/subcategories-demo-missing-one-explanation/21733/3 "2021-01-26T05:31:47Z")

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I couldn’t help but notice that “ **automagically** ” is a very fitting word 🤩

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**Author:** ![Darren\_Murphy](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/darren_murphy/32/47326_2.png) [@Darren\_Murphy](https://community.glideapps.com/u/Darren_Murphy)\
**Post date:** [January 26, 2021, 5:34am UTC](https://community.glideapps.com/t/subcategories-demo-missing-one-explanation/21733/4 "2021-01-26T05:34:30Z")

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It’s one of my favourite words, I use it a lot 😂

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**Author:** ![belzoni](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/belzoni/32/20862_2.png) [@belzoni](https://community.glideapps.com/u/belzoni)\
**Post date:** [January 26, 2021, 4:05pm UTC](https://community.glideapps.com/t/subcategories-demo-missing-one-explanation/21733/5 "2021-01-26T16:05:57Z")

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Ha! I didn’t even notice “automagically”. Guess I was too busy smacking myself in the forehead, V8 style.

Thanks!

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**Author:** ![NoCodeAndy](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/nocodeandy/32/62530_2.png) [@NoCodeAndy](https://community.glideapps.com/u/NoCodeAndy)\
**Post date:** [January 17, 2024, 4:53pm UTC](https://community.glideapps.com/t/subcategories-demo-missing-one-explanation/21733/6 "2024-01-17T16:53:46Z")

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