Foreach directive

Use the Foreach directive to repeat an action for each property in a page, for each page in a Page List, or for each property in any list or group. Properties that have a mode other than Single Value are known as aggregates. The Foreach directive iterates through the parts of an aggregate property.

For example, assume a clipboard page named Operators contains embedded pxResults() pages. These pages each hold a property pyUserIdentifier identifying one customer. Use the Foreach directive to create an HTML table that contains a row for each customer. For example:

<TABLE>
  {foreach Operators.pxResults}
     <TR>
       <TD>{$THIS.pyUserIdentifier}</TD>
     </TR>
  {endforeach}
</TABLE>

JSP Equivalent

The pega:forEach JavaServer Page tag provides a functionally identical capability. See JSP Tags — forEach.

Complete syntax

In the syntax presentations below:

Square bracket characters [ and ] define optional parts of the directive. Do not type the brackets.
Curly brace characters { and } mark the start and end of the directive.
Replace any text in italics with your choice of value of that type.

Use one of the three syntax variations.

To do something for each property in a Value List, Value Group, Page, Page List, or Page Group, use this syntax. In place of the word aggregate-reference, enter the name of the aggregate property.

{foreach [IN[=]] aggregate-reference}
actionToRepeat
{end}

To do something for each property in a top-level page, use this syntax:

{foreach INPAGE [=] page-name}
actionToRepeat
{end}

Use a pipe character (|) to separate pages in the list-of-page-names. If no page name appears, the pipe identifies the current page. For example, A|B||C refers to four pages: A, B, the current page, and C. Similarly, X|Y| refers to three pages: X, Y, and the current page.

Examples

These examples use the Foreach directive to display values from clipboard pages.

Remember that $THIS refers to the current active property reference. You can use $THIS to display a read-only value or to display an input field. To use $THIS to display an input field, add the keyword input:

{$THIS input}.

Obtain values for each assignment in a flow

To use the Foreach directive to obtain values from an embedded group of pages into HTML, use this syntax:

{foreach in=.pxFlow}
value="{$this.pxAssignmentKey}"
{end}

This example uses the Work-.pxFlow property, a Page Group. It identifies, in sequence, the value of the pxAssignmentKey property for each page in the Page Group.

Using the Foreach directive in control rules

To create a selection box, use syntax similar to the following:

<select>
{foreach in .pyKeyDefList}
<option value="{$this.pyKeyName}">{$this.pyKeyCaption}
{end}
</select>

To create option (radio) buttons, use syntax similar to the following:

{with target=$this}
{foreach in .pyKeyDefList}
<input type=radio
value="{$this.pyKeyName}">{$this.pyKeyCaption}
{end}
{end}

Directives