Interface

hema.mathivathanan

Certified Associate Developer

over 1 year ago

In the interface. I am getting error message for the below piece of code.

Error message :

Expression evaluation error in rule 'sshs_startformquestions' at function a!cardLayout [line 48]: Cannot compare incompatible operands of type Null and type Number (Integer).

Line: showWhen: {
local!selected1 = 2
}

It would be great if someone can help.

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Konduru Chaitanya over 1 year ago +1 verified
Certified Senior Developer

There are two Possibilities of why you see the error, 1. Either your Local variable local!selected1 has no value, if it is giving this message as soon as you write the code, may be you can do a null…
Konduru Chaitanya over 1 year ago in reply to hema.mathivathanan +1 verified
Certified Senior Developer

a!localVariables( local!selected1, local!selected2, local!selected3, { a!richTextDisplayField( value: { a!richTextItem(text: "", style: "PLAIN") } ), a!radioButtonField( label: "1", …

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+1 Konduru Chaitanya
Certified Senior Developer
over 1 year ago

There are two Possibilities of why you see the error,

1. Either your Local variable local!selected1 has no value,

if it is giving this message as soon as you write the code, may be you can do a null check for your showWhen. Lets say if-isnullorempty-{}-your condition.

2. It has a non integer value. If you are fetching or indexing it from somewhere else, may be you can wrap it in the tointeger() function.
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0 hema.mathivathanan
Certified Associate Developer
over 1 year ago in reply to Konduru Chaitanya

Thanks for your reply. I have 3 local variables defined. It would be great if you can help here on how to use the isnullorempty condition
showWhen: and(
local!selected1 =1,
local!selected2=2
)
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0 hema.mathivathanan
Certified Associate Developer
over 1 year ago in reply to Konduru Chaitanya

Thanks for your reply. I have 3 local variables defined. It would be great if you can help here on how to use the isnullorempty condition
showWhen: and(
local!selected1 =1,
local!selected2=2
)
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0 Konduru Chaitanya
Certified Senior Developer
over 1 year ago in reply to hema.mathivathanan

Hello hema.mathivathanan,

Can you please share your code? It would be more clear in order to provide an answer.
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0 hema.mathivathanan

Certified Associate Developer

over 1 year ago in reply to Konduru Chaitanya

a!localVariables(
  local!selected1,
  local!selected2,
  local!selected3,
  {
    a!richTextDisplayField(
      value: {
        a!richTextItem(
          text: "Please answer the below question(s)",
          style: "PLAIN"
        )
      }
    ),
    a!radioButtonField(
      label: "1.",
      labelPosition: "ABOVE",
      choiceLabels: { "Yes", "No" },
      choiceValues: { 1, 2 },
      value: local!selected1,
      saveInto: local!selected1,
      choiceLayout: "COMPACT",
      choiceStyle: "STANDARD",
      required: true,
    ),
    a!cardLayout(
      contents: {
        a!richTextDisplayField(
          value: {
            a!richTextItem(
              text: {
""
              },
              link: a!safeLink(
                label: "Appian Hardware Sizing methods",
                openLinkIn: "SAME_TAB"
              ),
              linkstyle: "STANDALONE"
            )
          }
        ),
        
      },
      style: "INFO",
      showBorder: false,
      showWhen:if(
        a!isNullOrEmpty(
          local!selected1),null,local!selected1 = 2
        )
      
      /*showWhen: local!selected1=2,*/
      ),
      
         a!radioButtonField(
      label: "2",
      labelPosition: "ABOVE",
      choiceLabels: { "Yes", "No" },
      choiceValues: { 1, 2 },
      value: local!selected2,
      saveInto: local!selected2,
      choiceLayout: "COMPACT",
      choiceStyle: "STANDARD",
      required: true,
      showWhen:if(
        a!isNullOrEmpty(
          local!selected1),null,local!selected1 = 1
      )
      
      /*showWhen: local!selected1 =1*/
    ),
    a!cardLayout(
      contents: {
        a!richTextDisplayField(
          value: {
            a!richTextItem(
              text: {
                "document",
                
              },
              link: a!documentDownloadLink(document: 2354149, ),
              linkstyle: "STANDALONE"
            )
          }
        ),
        
      },
      style: "INFO",
      showBorder: false,
      /*showWhen: if(*/
       /*a!isNullOrEmpty(local!selected1),null, */
/**/
       /*local!selected1=1*/
/*)*/
      
      showWhen: and(
        local!selected1 =1, 
        local!selected2=2
      )
    ),
    a!radioButtonField(
      label: "3.",
      labelPosition: "ABOVE",
      choiceLabels: { "Yes", "No" },
      choiceValues: { 1, 2 },
      value: local!selected3,
      saveInto: local!selected3,
      choiceLayout: "COMPACT",
      choiceStyle: "STANDARD",
      required: true,
      showWhen: {
        and(local!selected2 = 1, local!selected1 = 1)
      }
      
     
    ),
    /*a!cardLayout(*/
      /*contents: {*/
        /*a!richTextDisplayField(*/
          /*value: {*/
            /*a!richTextItem(*/
              /*text: {*/
                /*"document",*/
/*                */
              /*},*/
              /*link: a!documentDownloadLink(document: 2354149, ),*/
              /*linkstyle: "STANDALONE"*/
            /*)*/
          /*}*/
        /*),*/
/*        */
      /*},*/
      /*style: "INFO",*/
      /*showBorder: false,*/
      /*showWhen: {*/
        /*and(*/
          /*local!selected1 = 1,*/
          /*local!selected2 = 1,*/
          /*local!selected3 = 1*/
        /*)*/
      /*}*/
    /*),*/
    /*a!cardLayout(*/
      /*contents: {*/
        /*a!richTextDisplayField(*/
          /*value: {*/
            /*a!richTextItem(*/
              /*text: {*/
                /*" ocument",*/
/*                */
              /*},*/
              /*link: a!documentDownloadLink(document: 2354149, ),*/
              /*linkstyle: "STANDALONE"*/
            /*)*/
          /*}*/
        /*),*/
/*        */
      /*},*/
      /*style: "INFO",*/
      /*showBorder: false,*/
      /*showWhen: {*/
        /*and(*/
          /*local!selected1 = 1,*/
          /*local!selected2 = 1,*/
          /*local!selected3 = 2*/
        /*)*/
      /*}*/
    /*),*/
/*    */
  },
  
)

0 hema.mathivathanan

Certified Associate Developer

over 1 year ago in reply to Konduru Chaitanya

a!localVariables(
  local!selected1,
  local!selected2,
  local!selected3,
  {
    a!richTextDisplayField(
      value: {
        a!richTextItem(
          text: "",
          style: "PLAIN"
        )
      }
    ),
    a!radioButtonField(
      label: "1",
      labelPosition: "ABOVE",
      choiceLabels: { "Yes", "No" },
      choiceValues: { 1, 2 },
      value: local!selected1,
      saveInto: local!selected1,
      choiceLayout: "COMPACT",
      choiceStyle: "STANDARD",
      required: true,
    ),
    a!cardLayout(
      contents: {
        a!richTextDisplayField(
          value: {
            a!richTextItem(
              text: {
                "document",
                
              },
              link: a!safeLink(
                label: " methods",
                openLinkIn: "SAME_TAB"
              ),
              linkstyle: "STANDALONE"
            )
          }
        ),
        
      },
      style: "INFO",
      showBorder: false,
      showWhen:if(
        a!isNullOrEmpty(
          local!selected1),null,local!selected1 = 2
        )
      
      /*showWhen: local!selected1=2,*/
      ),
      
         a!radioButtonField(
      label: "2.",
      labelPosition: "ABOVE",
      choiceLabels: { "Yes", "No" },
      choiceValues: { 1, 2 },
      value: local!selected2,
      saveInto: local!selected2,
      choiceLayout: "COMPACT",
      choiceStyle: "STANDARD",
      required: true,
      showWhen:if(
        a!isNullOrEmpty(
          local!selected1),null,local!selected1 = 1
      )
      
      /*showWhen: local!selected1 =1*/
    ),
    a!cardLayout(
      contents: {
        a!richTextDisplayField(
          value: {
            a!richTextItem(
              text: {
                " document",
                
              },
              linkstyle: "STANDALONE"
            )
          }
        ),
        
      },
      style: "INFO",
      showBorder: false,
      /*showWhen: if(*/
       /*a!isNullOrEmpty(local!selected1),null, */
/**/
       /*local!selected1=1*/
/*)*/
      
      showWhen: and(
        local!selected1 =1, 
        local!selected2=2
      )
      

      
      

      
    ),
    a!radioButtonField(
      label: "3.",
      labelPosition: "ABOVE",
      choiceLabels: { "Yes", "No" },
      choiceValues: { 1, 2 },
      value: local!selected3,
      saveInto: local!selected3,
      choiceLayout: "COMPACT",
      choiceStyle: "STANDARD",
      required: true,
      showWhen: {
        and(local!selected2 = 1, local!selected1 = 1)
      }
      
     
    ),
   
    /*a!cardLayout(*/
      /*contents: {*/
        /*a!richTextDisplayField(*/
          /*value: {*/
            /*a!richTextItem(*/
              /*text: {*/
                /*" document",*/
/*                */
              /*},*/
              /*linkstyle: "STANDALONE"*/
            /*)*/
          /*}*/
        /*),*/
/*        */
      /*},*/
      /*style: "INFO",*/
      /*showBorder: false,*/
      /*showWhen: {*/
        /*and(*/
          /*local!selected1 = 1,*/
          /*local!selected2 = 1,*/
          /*local!selected3 = 2*/
        /*)*/
      /*}*/
    /*),*/
/*    */
  },
  
)

This is the code.

+1 Konduru Chaitanya

Certified Senior Developer

over 1 year ago in reply to hema.mathivathanan

a!localVariables(
  local!selected1,
  local!selected2,
  local!selected3,
  {
    a!richTextDisplayField(
      value: { a!richTextItem(text: "", style: "PLAIN") }
    ),
    a!radioButtonField(
      label: "1",
      labelPosition: "ABOVE",
      choiceLabels: { "Yes", "No" },
      choiceValues: { 1, 2 },
      value: local!selected1,
      saveInto: local!selected1,
      choiceLayout: "COMPACT",
      choiceStyle: "STANDARD",
      required: true,
      
    ),
    a!cardLayout(
      contents: {
        a!richTextDisplayField(
          value: {
            a!richTextItem(
              text: { "document",  },
              link: a!safeLink(label: " methods", openLinkIn: "SAME_TAB"),
              linkstyle: "STANDALONE"
            )
          }
        ),
        
      },
      style: "INFO",
      showBorder: false,
      showWhen: if(
        a!isNullOrEmpty(local!selected1),
        {},
        local!selected1 = 2
      )/*showWhen: local!selected1=2,*/
      
    ),
    a!radioButtonField(
      label: "2.",
      labelPosition: "ABOVE",
      choiceLabels: { "Yes", "No" },
      choiceValues: { 1, 2 },
      value: local!selected2,
      saveInto: local!selected2,
      choiceLayout: "COMPACT",
      choiceStyle: "STANDARD",
      required: true,
      showWhen: if(
        a!isNullOrEmpty(local!selected1),
        null,
        local!selected1 = 1
      )/*showWhen: local!selected1 =1*/
      
    ),
    a!cardLayout(
      contents: {
        a!richTextDisplayField(
          value: {
            a!richTextItem(
              text: { " document",  },
              linkstyle: "STANDALONE"
            )
          }
        ),
        
      },
      style: "INFO",
      showBorder: false,
      /*showWhen: if(*/
      /*a!isNullOrEmpty(local!selected1),null, */
      /**/
      /*local!selected1=1*/
      /*)*/
      showWhen: if(
        and(
          a!isNotNullOrEmpty(local!selected1),
          a!isNotNullOrEmpty(local!selected2)
        ),
        and(local!selected1 = 1, local!selected2 = 2),
        {}
      )
    ),
    a!radioButtonField(
      label: "3.",
      labelPosition: "ABOVE",
      choiceLabels: { "Yes", "No" },
      choiceValues: { 1, 2 },
      value: local!selected3,
      saveInto: local!selected3,
      choiceLayout: "COMPACT",
      choiceStyle: "STANDARD",
      required: true,
      showWhen: {
        if(
          and(
            a!isNullOrEmpty(local!selected1),
            a!isNullOrEmpty(local!selected2)
          ),
          {},
          and(
            tointeger(local!selected2) = 1,
            tointeger(local!selected1) = 1
          )
        )
      }
    ),
    /*a!cardLayout(*/
    /*contents: {*/
    /*a!richTextDisplayField(*/
    /*value: {*/
    /*a!richTextItem(*/
    /*text: {*/
    /*" document",*/
    /*                */
    /*},*/
    /*linkstyle: "STANDALONE"*/
    /*)*/
    /*}*/
    /*),*/
    /*        */
    /*},*/
    /*style: "INFO",*/
    /*showBorder: false,*/
    /*showWhen: {*/
    /*and(*/
    /*local!selected1 = 1,*/
    /*local!selected2 = 1,*/
    /*local!selected3 = 2*/
    /*)*/
    /*}*/
    /*),*/
    /*    */
    
  },
  
)

Just few changes in the show When. You can also create an expression rule and call it multiple places avoiding typing of same code lines with different values.

When there is no value in your Local variable it will not be able to determine the type. hence the error.