How to display data dynamically based on previous selected data

RE: How to display data dynamically based on previous selected data

Jayapriya Muthu — Thu, 16 Jul 2020 11:18:57 GMT

Please check the example

load(
  local!countryLabelConstant:{"IND","USA","UK"},
  local!countryValuesConstant:{1,2,3},
  local!indStatesConstant:{"TN","AP"},
  local!usaStatesConstant:{"AL","AK"},
  local!ukStatesConstant:{"JK","JL"},
  local!states,
  local!selectedCountry,
  local!selectedState,
  {
    a!dropdownField(
      label: "Country",
      placeholderLabel: "Please select",
      choiceLabels: local!countryLabelConstant,
      choiceValues: local!countryValuesConstant,
      value: local!selectedCountry,
      saveInto: {
        local!selectedCountry,
        a!save(
          local!selectedState,
          NULL
        ),
        a!save(
          local!states,
          choose(
            save!value,
            local!indStatesConstant,
            local!usaStatesConstant,
            local!ukStatesConstant
          )
        )
      }
    ),
    a!dropdownField(
      showWhen: not(
        rule!APN_isBlank(
          local!selectedCountry
        )
      ),
      label: "States",
      placeholderLabel: "Please select",
      choiceLabels: local!states,
      choiceValues: local!states,
      value: local!selectedState,
      saveInto: local!selectedState
    )
  }
)

RE: How to display data dynamically based on previous selected data

Timo — Thu, 16 Jul 2020 07:00:18 GMT

Yes agree,
Its possible with 2 but because you have a trimmed down second dropDown it will be though to do.

If its only 2 you can have

1 constant with countires
1 with states

STATE_CONSTANT[value of country constant]

RE: How to display data dynamically based on previous selected data

Jayapriya Muthu — Thu, 16 Jul 2020 06:44:43 GMT

In this case, you have to maintain States constant for each country. Based on selected country, you have to map the corresponding States constant to the variable of choiceLabels/ChoiceValues in Country dropdown SaveInto

I suggest you to go for a table option if you are having many Countries

RE: How to display data dynamically based on previous selected data

sirid — Thu, 16 Jul 2020 06:23:29 GMT

Hi Priya,

I tried but i can use this only when i have two lists in first dropdown. But i have more than 2. In this way it is not allowing more than one IF condition.

RE: How to display data dynamically based on previous selected data

sirid — Thu, 16 Jul 2020 06:17:36 GMT

Hi Timo,

Yes we can but i want to try using constants.

RE: How to display data dynamically based on previous selected data

Jayapriya Muthu — Wed, 15 Jul 2020 07:42:36 GMT

Update the States drop-down choiceLabels / choiceValues array in Country drop-down saveInto. Set showWhen for States dropdown to display if a values is selected in Country

Please refer for example : community.appian.com/.../cascade-dropdown

RE: How to display data dynamically based on previous selected data

Timo — Wed, 15 Jul 2020 07:40:59 GMT

Why not have a table

State / Country

So you query the unique countries in the first dropdown, save that value.
And based on the saved value you query the next dropdown.