feature request: list the items which have no due date set

[obbardc]

How would you feel about ttdl accepting none as an argument like --due none to show items with no due date?

[VladimirMarkelov]

due already supports none(and its alias -):

$ ttdl list
# D P Created    Finished   Due        Subject
-----------------------------------------------
5                           2020-07-12 new line
6                                      no due date
-----------------------------------------------

# the same output for: ttdl list --due -
$ ttdl list --due none
# D P Created    Finished   Due        Subject
-----------------------------------------------
6                                      no due date
-----------------------------------------------

[VladimirMarkelov]

It should be mentioned in docs - I did not find it. I'll add it

[VladimirMarkelov]

As it works, I'm closing it in favor of #33 that is a broader issue and includes a bullet for document update.

[obbardc]

thanks! it works in v0.9.0

[obbardc]

With the new syntax, ability to chain none to a due-date range doesn't appear to work correctly:

$ ttdl list --due=none..today
invalid value invalid date 'none' for date range

[VladimirMarkelov]

Yeah, I forgot about none. Now, I think, we should agree on how none works in all the cases:

1. Original one --due=none (a synonym is --due=-) - show all todos without a due date
2. Left side of "normal" range --due=none..<date>: it is a handy way to combine two lists --due=..<date> and --due=none in one
3. Right side of "normal" range --due=<date>..none: similar to 2 but combines --due=<date>.. and --due=none
4. Open range which starts with none: --due=none... To me, it just shows all the todo as if a command omits a range. So this case can be ignored when detected.
5. Open range which ends with none: --due=..none. To me, it looks like a synonym for --due=none
6. Crazy range --due=none..none: I think it is the same as 5 (just for making a full set)

Am I missing anything? Does it look OK?