Math with numeric values derived from a dropdown field












2















I had a dropdown field with a handle of hLevel, with only numeric values in it, anticipating that I could do math with the values in my template. But it seems I can't.



{% set dif = subhead.hLevel - subhead.next.hLevel %}



…returns an error message ending in:




“could not be converted to int”




I found a thread convinced that number_format “converts a string to a number”, so I tried that:



{% set dif = subhead.hLevel|number_format - subhead.next.hLevel|number_format %}



…but that doesn't work either. The error message changes to:




“could not be converted to double”




Which doesn't surprise me as I did think that number_format is for float to formatted string conversion, not the other way round as well. ¯_(ツ)_/¯



When I change the field format to number everything works fine, but…



It would be good if there is an option to have dropdown field values be parsed as numbers, because from a UX perspective I would prefer that the field is a dropdown.



Or is there some workaround I've missed?










share|improve this question





























    2















    I had a dropdown field with a handle of hLevel, with only numeric values in it, anticipating that I could do math with the values in my template. But it seems I can't.



    {% set dif = subhead.hLevel - subhead.next.hLevel %}



    …returns an error message ending in:




    “could not be converted to int”




    I found a thread convinced that number_format “converts a string to a number”, so I tried that:



    {% set dif = subhead.hLevel|number_format - subhead.next.hLevel|number_format %}



    …but that doesn't work either. The error message changes to:




    “could not be converted to double”




    Which doesn't surprise me as I did think that number_format is for float to formatted string conversion, not the other way round as well. ¯_(ツ)_/¯



    When I change the field format to number everything works fine, but…



    It would be good if there is an option to have dropdown field values be parsed as numbers, because from a UX perspective I would prefer that the field is a dropdown.



    Or is there some workaround I've missed?










    share|improve this question



























      2












      2








      2








      I had a dropdown field with a handle of hLevel, with only numeric values in it, anticipating that I could do math with the values in my template. But it seems I can't.



      {% set dif = subhead.hLevel - subhead.next.hLevel %}



      …returns an error message ending in:




      “could not be converted to int”




      I found a thread convinced that number_format “converts a string to a number”, so I tried that:



      {% set dif = subhead.hLevel|number_format - subhead.next.hLevel|number_format %}



      …but that doesn't work either. The error message changes to:




      “could not be converted to double”




      Which doesn't surprise me as I did think that number_format is for float to formatted string conversion, not the other way round as well. ¯_(ツ)_/¯



      When I change the field format to number everything works fine, but…



      It would be good if there is an option to have dropdown field values be parsed as numbers, because from a UX perspective I would prefer that the field is a dropdown.



      Or is there some workaround I've missed?










      share|improve this question
















      I had a dropdown field with a handle of hLevel, with only numeric values in it, anticipating that I could do math with the values in my template. But it seems I can't.



      {% set dif = subhead.hLevel - subhead.next.hLevel %}



      …returns an error message ending in:




      “could not be converted to int”




      I found a thread convinced that number_format “converts a string to a number”, so I tried that:



      {% set dif = subhead.hLevel|number_format - subhead.next.hLevel|number_format %}



      …but that doesn't work either. The error message changes to:




      “could not be converted to double”




      Which doesn't surprise me as I did think that number_format is for float to formatted string conversion, not the other way round as well. ¯_(ツ)_/¯



      When I change the field format to number everything works fine, but…



      It would be good if there is an option to have dropdown field values be parsed as numbers, because from a UX perspective I would prefer that the field is a dropdown.



      Or is there some workaround I've missed?







      drop-down number math






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Feb 1 at 18:23







      Jonathan Schofield

















      asked Feb 1 at 18:16









      Jonathan SchofieldJonathan Schofield

      1516




      1516






















          1 Answer
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          Have you tried subhead.hLevel.value?






          share|improve this answer
























          • Doh! I am an idiot. That works. Thanks Olivier :)

            – Jonathan Schofield
            Feb 1 at 18:26






          • 1





            @JonathanSchofield Happened to me, that's the only reason I picked up on it ;) Glad I could help

            – Olivier Bon
            Feb 1 at 18:30











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          1 Answer
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          active

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          1 Answer
          1






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes









          4














          Have you tried subhead.hLevel.value?






          share|improve this answer
























          • Doh! I am an idiot. That works. Thanks Olivier :)

            – Jonathan Schofield
            Feb 1 at 18:26






          • 1





            @JonathanSchofield Happened to me, that's the only reason I picked up on it ;) Glad I could help

            – Olivier Bon
            Feb 1 at 18:30
















          4














          Have you tried subhead.hLevel.value?






          share|improve this answer
























          • Doh! I am an idiot. That works. Thanks Olivier :)

            – Jonathan Schofield
            Feb 1 at 18:26






          • 1





            @JonathanSchofield Happened to me, that's the only reason I picked up on it ;) Glad I could help

            – Olivier Bon
            Feb 1 at 18:30














          4












          4








          4







          Have you tried subhead.hLevel.value?






          share|improve this answer













          Have you tried subhead.hLevel.value?







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Feb 1 at 18:21









          Olivier BonOlivier Bon

          64437




          64437













          • Doh! I am an idiot. That works. Thanks Olivier :)

            – Jonathan Schofield
            Feb 1 at 18:26






          • 1





            @JonathanSchofield Happened to me, that's the only reason I picked up on it ;) Glad I could help

            – Olivier Bon
            Feb 1 at 18:30



















          • Doh! I am an idiot. That works. Thanks Olivier :)

            – Jonathan Schofield
            Feb 1 at 18:26






          • 1





            @JonathanSchofield Happened to me, that's the only reason I picked up on it ;) Glad I could help

            – Olivier Bon
            Feb 1 at 18:30

















          Doh! I am an idiot. That works. Thanks Olivier :)

          – Jonathan Schofield
          Feb 1 at 18:26





          Doh! I am an idiot. That works. Thanks Olivier :)

          – Jonathan Schofield
          Feb 1 at 18:26




          1




          1





          @JonathanSchofield Happened to me, that's the only reason I picked up on it ;) Glad I could help

          – Olivier Bon
          Feb 1 at 18:30





          @JonathanSchofield Happened to me, that's the only reason I picked up on it ;) Glad I could help

          – Olivier Bon
          Feb 1 at 18:30


















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