Summary

This command returns true if the parameter specified exists. It is typically used to check for the existence of a form in a subject record, and will return false if that form has not yet been created or has been deleted.

Attributes

  • none

Parameters

  • one command

Example

For alerts that are checking values on dependent questions/forms that may not yet exist (are created by scripts), the alert must be programmed using a script rather than a traditional dependency expression. This triggers the logic to re-evaluate if the dependent form is created and answered at a later date.

<script scriptId="karnofskyCheckFinalRunIn1">
    <body>
        <s:alert>
            <s:expression>
                <s:or>
                    <s:not>
                    
                        <s:exists>
                            <s:form path="/runIn1RS2/peVsRunInRS2"/>
                        </s:exists>
                        
                    </s:not>
                    <s:not>
                        <s:isSet>
                            <s:question>
                                <s:question path="/runIn1RS2/peVsRunInRS2.karnofsc"/>
                            </s:question>
                        </s:isSet>
                    </s:not>
                    <s:not>
                        <s:isSet/>
                    </s:not>
                    <s:ne>
                        <s:stringPath path="/runIn1RS2/ieRS2.inc13:value"/>
                        <s:string value="y"/>
                    </s:ne>
                    <s:gte>
                        <s:numberPath path="/runIn1RS2/peVsRunInRS2.karnofsc:value"/>
                        <s:number value="60"/>
                    </s:gte>
                </s:or>
            </s:expression>
            <s:correction>
                <s:string value="optional"/>
            </s:correction>
            <s:text>
                <s:string value="The 'Karnofsky score' entered is less than 60%.  
                Please clarify the 'Karnofsky score' or the response to this Inclusion.
                Criteria."/>
            </s:text>
        </s:alert>
    </body>
    <target typeId="inc13"  when="preprocess" shouldReconcile='true' />
    <dependent path="/runIn1RS2/peVsRunInRS2.karnofsc"/>
</script>


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