How can we assign a boolean value to null

RE: How can we assign a boolean value to null

Abhay Dalsaniya — Tue, 06 Feb 2024 21:32:43 GMT

Anything other than true (including null) evaluates else block.

RE: How can we assign a boolean value to null

Harshit Bumb (Appyzie) — Mon, 05 Feb 2024 20:00:54 GMT

I wish every function in Appian was designed this way, but sadly it varies. So this is a standard practice I use every time when dealing with booleans.

RE: How can we assign a boolean value to null

Stefan Helzle — Mon, 05 Feb 2024 19:55:39 GMT

if() treats null just like false already.

RE: How can we assign a boolean value to null

Harshit Bumb (Appyzie) — Mon, 05 Feb 2024 19:43:11 GMT

or() with booleans is used to convert null into false.

RE: How can we assign a boolean value to null

Abhay Dalsaniya — Mon, 05 Feb 2024 19:35:46 GMT

if(
  ri!outageEligible,
  {},
  a!save(ri!outage, null)
)

RE: How can we assign a boolean value to null

preethas0001 — Wed, 31 Jan 2024 11:38:26 GMT

Thank you , this worked

RE: How can we assign a boolean value to null

preethas0001 — Wed, 31 Jan 2024 11:38:04 GMT

Yeah , I am using into the saveinto of button widget

RE: How can we assign a boolean value to null

Harshit Bumb (Appyzie) — Tue, 30 Jan 2024 13:34:12 GMT

In your code, you are comparing a boolean with a boolean.

Instead, it could be further simplified as

if(
  or(ri!outageEligible),
  {},
  a!save(ri!outage, null)
)

RE: How can we assign a boolean value to null

Harshmodi — Tue, 30 Jan 2024 13:29:56 GMT

Hey,

a!save( target, value)

In interface saveInto parameters, updates the target with the given value. Use a!save for each item that you want to modify or alter in a saveInto parameter. This function has no effect when called outside of a component (saveInto parameter).

According to your question, you can give this a try based on my understanding:

If outageEligible is false, save null in the outage rule input; otherwise, not

if(or(ri!outageEligible)=false,a!save(ri!outage,null),{})

RE: How can we assign a boolean value to null

Konduru Chaitanya — Tue, 30 Jan 2024 13:19:18 GMT

Hello preethas0001

[quote userid="75747" url="~/discussions/f/user-interface/33884/how-can-we-assign-a-boolean-value-to-null"]a!save(ri!ouage,null(), a!save(null(),null())) [/quote]

Is your rule input named the same? Why do you have a second a!save(null(),null()) which does not make any sense.

Also can you share your code properly and the button widget code.(Hope you are using this logic in a saveInto parameter)

RE: How can we assign a boolean value to null

Stefan Helzle — Tue, 30 Jan 2024 13:19:18 GMT

I tried to turn your code into a more readable version.

if(
  rule!GBL_isnull(ri!outageEligible,false()),
  a!save(
    target: ri!ouage,
    value: null()
  ),
  a!save(
    target: null(),
    value: null()
  )
)

Not sure what you are trying to do here, or where this code snippet is used.

Maybe something like this might work better:

if(
  rule!GBL_isnull(ri!outageEligible,false()),
  a!save(
    target: ri!ouage,
    value: null()
  ),
  {}
)