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displayvalue() Function

Function

displayvalue( value, inArray, replacement, default )

Tries to match a value in a given array with a value at the same index in a replacement array and returns either the value at the same index or a default value if the value is not found.

See also: resource()

Parameters

Keyword Type Description

value

Any Type

The value to search for in the array. Will cast to the type of inArray.

inArray

Any Type Array

The array to be searched.

replacement

Any Type Array

The array of replacement values.

default

Any Type

The default value to be returned if the search value is not found.

Returns

Any Type

Usage considerations

Suggested uses

This function is typically used to return a text display value that corresponds to an ID value stored in a process variable and makes it easier to generate reports that show human-readable values instead of numeric IDs in process data.

You can also use it to search a CDT array and return the CDT that has a field value matching a process variable value. Do this by creating an expression similar to the following: displayvalue(pv!departmentID, pv!departments.departmentID, pv!departments, "none")

Using the value parameter

The type of the argument passed to value must match the types in the replacement array, otherwise the default value will be returned.

Using the replacement parameter

If the length of the replacement array is shorter than the inArray array, the replacement array will be repeatedly extended until it is the same length as the longer inArray array.

Using displayvalue() with arrays

This function supports expressions or process variables for arrays.

Examples

Return a priority level based on the number in an array

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a!localVariables(
  local!priority: 2,
  displayvalue(
    local!priority,
    {0,1,2},
    {"Low","Medium","High"},
    "Unknown"
  )
)

Returns High. If you change local!priority to 3, the expression returns Unknown.

Working with string values

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displayvalue(
  { "Group 1" },
  { "Group 1", "Group 2", "Group 3", "Group 4" },
  { "Order", "Customer", "Invoice", "Parts" },
  "Unknown Group"
)

Returns "Order".

Working with integer values

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displayvalue(
  { 3 },
  { 1, 2, 3, 4, 5 },
  { "A", 2, "C", "D", 5 },
  "Unknown"
)

Returns "C".

Working with boolean values

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displayvalue(
  { true },
  { true, false },
  { "First", "Second" },
  "Unknown"
)

Returns "First".

Return a value not found in replacement

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displayvalue(
  { "Group 4" },
  { "Group 1", "Group 2", "Group 3", "Group 4" },
  { "Order", "Customer", "Invoice" },
  "Unknown Group"
)

Returns "Order". If the matching index from inArray is not found in replacement, then the the index loops back to beginning of the list. In this case, the first value from replacement is returned.

Use with the resource() function to display internationalized text

In the custom_locale_en_US.properties file located in the <INSTALL_HOME>/server/_conf directory, define the following key value pairs:

  • low=Low
  • medium=Medium
  • high=High

Define a pv!priority process variable of type Number and set the current locale to en_US.

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displayvalue(
  pv!priority,
  {0,1,2},
  {resource("low"),resource("medium"),resource("high")},
  "Unknown"
)

Returns High when pv!priority = 2 because the resource() function looked up the value for the key high.

Feature compatibility

The table below lists this function's compatibility with various features in Appian.
Feature Compatibility Note
Portals Compatible
Offline Mobile Compatible
Sync-Time Custom Record Fields Compatible

Can be used to create a custom record field that only evaluates at sync time.

Real-Time Custom Record Fields Incompatible

Custom record fields that evaluate in real time must be configured using one or more Custom Field functions.

Process Reports Compatible
Process Events Compatible
Open in Github Built: Fri, Mar 01, 2024 (07:35:43 PM)

displayvalue() Function

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