Cascading drop downs

RE: Cascading drop downs

Mike Schmitt — Tue, 21 Dec 2021 16:56:51 GMT

Another way to put it would be, to get used to coding for basic functionality before trying more advanced functionality. Someone who doesn't actually understand the workings of basic functionality will run into many issues when trying to implement more complex things, based simply on not understaning what's happening in their code - such as what we're seeing in this example.

RE: Cascading drop downs

Tanvir Sarkar — Tue, 21 Dec 2021 08:05:33 GMT

I would suggest to make your basic concepts clear before achieving anything. The code you have posted its wrong in the very basic. you cant declare ri!ri!subCategory the way you've done in the middle of the code. If you aren't familiar with expresion mode coding, try the drag & drop design mode interface design. also the above suggestions are useful to clear your basic concepts first & then implement something

RE: Cascading drop downs

praveen1989 — Tue, 21 Dec 2021 02:47:49 GMT

I would like to achieve cascading drop down values

RE: Cascading drop downs

Peter Lewis — Mon, 20 Dec 2021 21:17:57 GMT

I believe Stefan's suggestion is the right one from the code perspective. One other thing to point out - you define rule inputs entirely separately from expressions via the inputs pane on the right hand side. This then lets you expose these rule inputs outside of your rule to other objects as necessary.

I'd suggest reading this section in particular to understand rule inputs better: docs.appian.com/.../SAIL_Tutorial.html

RE: Cascading drop downs

Stefan Helzle — Mon, 20 Dec 2021 11:11:37 GMT

As I have no idea what you want to achieve.

Please check the linked documentation. Also consider to attend the online trainings to better understand how Appian works.

https://docs.appian.com/suite/help/21.4/Expressions.html

docs.appian.com/.../SAIL_Tutorial.html

Maybe something in line with this might get you started:

a!localVariables(
  local!availableSubCategories: choose(
    if(isnull(ri!category),1,ri!category),
    {"Laptop Issue","Internet Issue"},
    {"Cabs Issue","AC Issue"},
    {"Salary Issue","Project Allocation Issue"},
    {"Finance Planning","Fund Raising"}
  ),
  ....
  <YOUR CODE>
  a!dropdownFieldByIndex(
                  label: "Sub Category",
                  labelPosition: "ABOVE",
                  placeholder: "--- Select a Value ---",
                  choiceLabels:local!availableSubCategories,
                  value: ri!subCategory,
                  saveInto:{ri!subCategory},
                  disabled: isnull(ri!category),
                  searchDisplay: "AUTO",
                  validations: {}
                )
)

Be aware that this is mostly guesswork!

RE: Cascading drop downs

praveen1989 — Mon, 20 Dec 2021 11:01:39 GMT

Can you please provide the resolution for this

RE: Cascading drop downs

Stefan Helzle — Mon, 20 Dec 2021 10:58:35 GMT

It seems like you try to assign a value to a rule input. It does not work like this in Appian.

   ri!subCategory: choose(
      if(isnull(ri!category),1,ri!category),
      {"Laptop Issue","Internet Issue"},
      {"Cabs Issue","AC Issue"},
      {"Salary Issue","Project Allocation Issue"},
      {"Finance Planning","Fund Raising"}
    ),

docs.appian.com/.../Local_Variables.html

RE: Cascading drop downs

praveen1989 — Mon, 20 Dec 2021 10:53:38 GMT

What is wrong you found in line 42?

RE: Cascading drop downs

Stefan Helzle — Mon, 20 Dec 2021 07:25:21 GMT

Line 42 is wrong. What is the intention here?