Always one selected value or non-selected in Field

[Arthur_Fong]

Hi all,

Is there a way to configure a field to only allow user to select one value at each time? 

I came across "always one selected" in field settings but this option does not have the flexibility to not select anything at all for the field.

Any idea how can we allow user to select only one value for the specific field, and also allows the user to remove this field selection?

Thanks and regards,
Arthur Fong

[ArnadoSandoval]

Hi @Arthur_Fong 

Yes there is a way to restrict a field to a single selection, take a look at this Set the Always one selected value 

Hope this helps,

[Arthur_Fong]

This will not allow user to deselect the specific field.

Thanks.

[Or]

By definition, "Only one selected value" requires one selected value meaning it can't be de-selected.

Some extensions will allow you to set a filter to only allow one selection, without actually enabling Qlik's "Always one selected value" option. However, if a user accesses this field from another source, e.g. the "Selections" screen or smart search or current selections, they will be able to select multiple values or no values at all.

We've worked around this by concatenating the text value "Please select one value" or "Default" or "All" into our field and setting that as a default value for Always One Selected. Our objects then have a calculation condition which requires the user select a value as appropriate (that is, objects which require this selections will not load if the selection is "Please select one value", but you could also set your formulas to ignore this selection, e.g. if our field is  Country, then selecting "All" will make the formula select all countries, and if any other value is selected it will respect the selected value. 

[Arthur_Fong]

You have a sample app on this?

[Or · Accepted solution]

Nothing that I am able to share.

Scriptside, CONCATENATE OriginalTable Load * INLINE [

MyDimension

Please Select Value ];

Object-side, e.g.

if(myDimension = 'Please Select Value',

Sum({<myDimension = >}myMeasure),

Sum(myMeasure) )

[Arthur_Fong · Accepted solution]

Hi @Or ,

Thanks for the idea provided.
Gave me an idea on how to proceed with the Script and Front End Expression.

Refer sample app attached as reference.