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two dependent field updating each other

For Clinicians by Clinicians

Last Post by Anonymous 1 second ago

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amaskey

(@amaskey)

Posts: 88

Estimable Member

Topic starter

as en example user could enter height data as cm or inch. regardless of what field they enter, I want to update the other automatically.

{! if height_inch <> "" then

height_cm = convert_inch_to_cm(height_inch)

else

height_cm=""

endif}

{! if height_cm <> "" then

height_inch= convert_cm_to_inch(height_cm)

else

height_inch=""

endif}

depending on which function run first, it is possible that both height_inch and height-cm are blank. How can I make sure the correct fun runs first?

Posted : October 11, 2017 6:45 am

bhoover

(@bhoover)

Posts: 360

Honorable Member

Could you combine the two functions? Something like this:

{! if height_inch <> “” then

height_cm = convert_inch_to_cm(height_inch)

else if height_cm <> “” then

height_inch= convert_cm_to_inch(height_cm)

else

height_cm=””

height_inch=””

endif

endif}

This way you have a bit more control over how the function is being fired. Otherwise I might look at trying to move the values into a obs term and fire the functions when an obs term is updated.

Posted : October 11, 2017 7:22 am

amaskey

(@amaskey)

Posts: 88

Estimable Member

Topic starter

Thank you for your response @bhoover. I tried watcher expression using obs term and global variable and it has never quite worked

The problem with combining both as you suggested the function only gets activated when height_inch changes. If the changes are made to height_cm, the above function is skipped over.

Posted : October 11, 2017 8:25 am

rwilliams

(@rwilliams)

Posts: 454

Honorable Member

I would approach it like this:

In your code area put the following. (assuming they are document variables) The code should execute every time there is a change to the corresponding document variable.

{convert_inch_to_cm(DOCUMENT.HEIGHT_INCH)}
{convert_cm_to_inch(DOCUMENT.HEIGHT_CM)}

Then in your functions make sure they set the proper values in the other fields. You could replace either or both DOCUMENT.HEIGHT* with observations if that is what you are using.
{convert_inch_to_cm(OBSNOW("HEIGHT"))}

Posted : October 12, 2017 3:16 am

amaskey

(@amaskey)

Posts: 88

Estimable Member

Topic starter

@rwilliams, I did not quite understand

Posted : October 16, 2017 5:53 am

rwilliams

(@rwilliams)

Posts: 454

Honorable Member

I just created a form with two edit fields, HIGHT_IN and HEIGHT_CM, both document variables. The following code works to immediately convert inches to CM and visa-versa as soon as you click off the field. If you would like a copy of a working version of this form please send me an email.

{!convert_inch_to_cm(DOCUMENT.HEIGHT_IN)} {!convert_cm_to_inch(DOCUMENT.HEIGHT_CM)}


{!

fn convert_inch_to_cm(inches){

	local cm

	if val(inches) > 0 then

		cm = val(inches) * 2.54

		cm = round(cm, 2)

		DOCUMENT.HEIGHT_CM = str(cm)

	endif
}

}

{! fn convert_cm_to_inch(cm){ local inches = 0 if val(cm) > 0 then inches = val(cm) / 2.54 inches = round(inches, 2) DOCUMENT.HEIGHT_IN = str(inches) endif } }

Posted : October 16, 2017 6:20 am

amaskey

(@amaskey)

Posts: 88

Estimable Member

Topic starter

awesome that works. Thank you very much.

Also in the my original functions, I removed the watched "!" and that fixed the issue too.

Posted : October 16, 2017 7:29 am

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