"Is not" is not not "Is". Where did I miss that about advanced filters?

[styrobrain]

Hi all! Assuming I have this task hierarchy:

Fruit [Folder]

- Apple

- Orange

Wood [Folder]

- Alder

- Ovangkol

Mood [Folder]

- Happy

- Sad

Assuming further that I don't want to see the (ill-fitting) "Mood" branch, and I want to continue not seeing it if I later add a "Metal" branch.

To only see "Mood", I can use an advanced filter "TopLevelFolderName" "is" 'Mood'. So to see everything but, I tried the inverse: "TopLevelFolderName" "is not" 'Mood'. Did not do anything.

I started writing this post lamenting my stupidity keeping me from figuring this out... then a hunch crept up on me. Maybe a faint echo of my CS studies. This advanced filter does the trick:

- "TopLevelFolderName" "is not empty" AND

- "TopLevelFolderName" "is not" 'Mood'

Now my question is: how could I have known that? Is it documented anywhere (apart from ancient CS textbooks) and I was too blind to spot it?

If so: where?

If not: why?

[Alexander W.]

not sure what you want to achieve... so - just one thought:

are you aware that

- childs of filtered tasks can be displayed - or not

- the filters can be applied to child tasks too?

if not - the path to outcome could be:

- tag the wanted folders with a feature of MLO like (context, flag, ... other attributes)

- filter a "wanted" folders

- .. and have the child tasks displayed too.

done

-a