local variable

RE: local variable

Selvakumar Kumarasamy — Thu, 21 Jan 2021 03:28:18 GMT

That's a good solution. But the only problem which accompanies this solution is a change in the CDT structure in the future.

Let's say at first we have 10 fields in the CDT and we use this type! constructor solution in 5 places. After 6 months, we add 2 more fields to the CDT due to business requirements. Now again, we need to revisit all the above 5 places to add those two fields in our logic. Hence futuristic code change is a considerable factor for this solution.

Whereas the update dictionary function performs multiple field value updates and it does not have any impact based on CDT change.

RE: local variable

davel001150 — Wed, 20 Jan 2021 19:19:06 GMT

There's a fairly tedious solution, which makes a good bit of code, but it's reliable and works with Appian right out of the box. You use type! constructor in a forEach.

a!forEach(

items: yourArray,

expression: type!<yourCDTsName>(

field1: fv!item.field1,

field2: fv!item.field2,

field3: fv!item.field3,

/*The only thing you actually wanted to change*/

field4: ri!newValue,

field5: fv!item.field5,

and so on.....

)

We all actually have the same idea about the forEach. The reason yours isn't working is because you're attempting to use the save! function. That only works in an interface component's saveInto block. It's designed to not work unless a user has actively clicked on a thing. It won't work outside a saveInto by design.

The plugin works, if you want to deal with the plugin, but this version also works too. You build a NEW CTD exactly like the old one in every detail, except for the one detail you want changed. This method also allows you to alter multiple details as you see fit simultaneously.

RE: local variable

Ahmad yaqoup — Tue, 19 Jan 2021 08:23:12 GMT

thanks Selvakumar_Kumarasamy

RE: local variable

Selvakumar Kumarasamy — Mon, 18 Jan 2021 14:21:06 GMT

Hi Ahmad,

For updating a particular field in a dictionary object, the function updateDictionary() from the "Dictionary Manipulation" custom plug-in would be more helpful. An example code is attached.

a!localVariables(
  local!msg: {
    { id: 1, isDeleted: false(), seenBy: "You" },
    { id: 2, isDeleted: false(), seenBy: null }
  },
  a!forEach(
    items: local!msg,
    expression: updatedictionary(
      dictionary: fv!item,
      fieldsAndValues: if(
        isnull(fv!item.seenBy),
        { seenBy: "Me" },
        { seenBy: concat(fv!item.seenBy, ",", "Me") }
      )
    )
  )
)

Hope this helps you.