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a!pagingInfo() Function

Function

a!pagingInfo( startIndex, batchSize, sort )

Creates a value of type PagingInfo for use with grids, queries, and todatasubset().

See also: PagingInfo, Read-Only Grid, a!sortInfo(), a!queryRecordType()

Parameters

Keyword Type Description

startIndex

Integer

Index of the array in which to start returning values for the subset. Valid values include those greater than zero.

batchSize

Integer

The number of items to return. When used with records, valid values are 0 to 5,000. When used with an entity, valid values include those greater than or equal to -1. See Using the batchSize parameter for more information about the allowed values.

sort

SortInfo Array

Valid values include null, an empty array of SortInfo, or an array of SortInfo where <SortInfo>.field is the name of a field on the input array elements or "dot" notation for a nested field.

Returns

PagingInfo

Usage considerations

Using the startIndex parameter

If the startIndex value is greater than the total number of items in the list the PagingInfo value is applied to, a null array is returned as the data.

Using the batchSize parameter

The batchSize parameter determines the number of items to return. Depending on the data you are querying, the valid values for a batchSize may vary.

batchSize value Returns
-1 All items are returned. This value is only supported in a!queryEntity().
0 or null Only the totalCount and startIndex of the array are returned (no data). This value is only supported in a!queryEntity() and a!queryRecordType where the source is a database or Salesforce.
>1 Returns the specified number of results, starting at the startIndex.

If the batchSize is 0, the total count of records will be returned, but no data.

If the batchSize value is -1, all items are returned. When People Functions contain PagingInfo, the batchSize parameter must be greater than or equal to zero; -1 is not a valid option.

A batch size of 0 cannot be used for the following record types:

  • Service-backed record types that have data sync disabled
  • Process-backed record types
  • Legacy record types

Using the sort parameter

If the sort value is not null or empty, the function your PagingInfo is applied to returns a subset of the input sorted by the field value of the SortInfo. If the value is null or empty, it returns an unsorted subset of the input.

Examples

You can copy and paste these examples into the Expression Rule Designer to see how this works.

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a!pagingInfo(
  startIndex: 1,
  batchSize: 4,
  sort: a!sortInfo(
    field: "name",
    ascending: true()
  )
)

returns

[startIndex=1, batchSize=4, sort=[field=name, ascending=true]]

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 Incompatible
Real-Time Custom Record Fields Incompatible
Process Reports Incompatible

You cannot use this function to configure a process report.
Process Events Incompatible

You cannot use this function to configure a process event node, such as a start event or timer event.

a!pagingInfo() Function

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