How to check for the variable passed to a function inside a component

Question

I'm trying to pass a variable to a function inside of a
component in a conditional statement.
How to check the existance of this variable inside the
function so that I can use the right <CFarguments>:
in aForm.cfm I have:
<cfinvoke component="#application.cfcroot#.business.Order"
method="selOrderItems"
returnvariable="q_OrderItems"
OrderItemAbbreviation="Min"></cfinvoke>
<cfset MCompIDs = ValueList(q_OrderItems.OrderItemID)>
<cfif listFind(MCompIDs,attributes.CompID)>
<cfset isM = true>
<cfelse>
<cfset isM = false>
</cfif>
<cfinvoke component="#application.cfcroot#.business.Order"
method="selOrderItems"
returnvariable="q_OrderItems"
OrderItemAbbreviation="SMEnroll"></cfinvoke>
<cfset SM_CompIDs =
ValueList(q_OrderItems.OrderItemID)>
<cfif listFind(SM_CompIDs,attributes.CompID)>
<cfset isSM = true>
<cfelse>
<cfset isSM = false>
</cfif>
<CFIF isSM>
<cfset temppath = frmcreator.buildFrm(isSMFlag=isSM)>
<CFELSE>
<cfset temppath = frmcreator.buildFrm(isMFlag=isM)>
</CFIF>
On aFormComp.cfc where the function is,
I checked the existance of isSMFlag this way and I got error
saying that :
Context validation error for tag CFARGUMENT.; The tag must be
nested inside a CFFUNCTION tag.
How can I properly check the existance of isSMFlag inside the
function so I can use the right cfarguments?
<CFFUNCTION NAME="buildFrm" access="public"
returntype="String" output="No">
<cfif StructKeyExists(arguments, "isSMFlag")>
<CFARGUMENT NAME="isSMFlag" REQUIRED="YES"
TYPE="NUMERIC">
<cfelse>
<CFARGUMENT NAME="isMFlag" REQUIRED="YES"
TYPE="NUMERIC">
</cfif>
........ etc
</CFFUNCTION>

Answer 1

<CFFUNCTION NAME="buildFrm" access="public"
returntype="String"
output="No">
<cfif StructKeyExists(arguments, "isSMFlag")>
<CFARGUMENT NAME="isSMFlag" REQUIRED="YES"
TYPE="NUMERIC">
<cfelse>
<CFARGUMENT NAME="isMFlag" REQUIRED="YES"
TYPE="NUMERIC">
</cfif>
........ etc
</CFFUNCTION>
NOT this way, that is for sure.
The <cfargument ...> tag is for defining the arguments
a function
accepts either optional or not, but they are not required.
Give this a
try to see the differences.
test.cfc
<cfcomponent>
<cffunction name="a">
<cfdump var="#arguments#">
</cffunction>
<cffunction name="b">
<cfargument name="foo">
<cfargument name="bar">
<cfdump var="#arguments#>
</cffunction>
</cfcomponent>
test.cfm
<cfset something = createObject("component","test")>
<cfoutput>
#something.a("blue","green")#
#something.b("blue","green")#
</cfoutput>
Not tested or debugged so watch out for typos.