User Guide

86 Chapter 2: ColdFusion Tags
Attributes
Usage
If you specify the extends attribute, the data and methods of the parent component are available
to any as if they were parts of the current component. If the managerCFC component extends the
employeeCFC component, and the employeeCFC component has a getEmployeeName method,
you can call this method using the managerCFC, as follows:
<cfinvoke component="managerCFC" method="getEmployeeName"
returnVariable="managerName" EmployeeID=#EmpID#>
This tag requires an end tag.
Example
<cfcomponent>
<cffunction name="getEmp">
<cfquery
name="empQuery" datasource="ExampleApps" >
SELECT FIRSTNAME, LASTNAME, EMAIL
FROM tblEmployees
</cfquery>
<cfreturn empQuery>
</cffunction>
<cffunction name="getDept">
<cfquery
name="deptQuery" datasource="ExampleApps" >
SELECT *
FROM tblDepartments
</cfquery>
<cfreturn deptQuery>
</cffunction>
</cfcomponent>
Attribute Req/Opt Default Description
extends Optional Name of parent component from which to inherit methods
and properties.
output Optional Component
body
displayable
text is
processed
as standard
CFML
Specifies whether constructor code in the component can
generate HTML output; does not affect output in the body
of
cffunction tags in the component.
• yes: Constructor code is processed as if it were within a
cfoutput tag. Variable names surrounded by number
signs (#) are automatically replaced with their values.
• no: Constructor code is processed as if it were within a
cfsilent tag.
• If you do not specify this attribute, constructor code is
processed as standard CFML. Any variables must be in
cfoutput tags.
displayname Optional name
attribute
value
A string to be displayed when using introspection to show
information about the CFC. The information appears on the
heading, following the component name.
hint Optional Text to be displayed when using introspection to show
information about the CFC. The hint attribute value
appears below the component name heading. This attribute
can be useful for describing the purpose of the parameter.