Count variables in a loop - variables

Question

I want to count the variables and show it somewhere in my code. I have a loop:
<cfloop query="get_serial">
<cfif PROCESS_ID eq attributes.action_id> #SERIAL_NO# </cfif>
</cfloop>
and its query:
<cfquery name="get_serial" datasource="#dsn3#">
SELECT *
FROM SERVICE_GUARANTY_NEW
WHERE STOCK_ID = #attributes.action_row_id#
ORDER BY SERIAL_NO
</cfquery>
Everything works fine, but I want to count how many variables are displayed exactly. I actually want to do it in this way because I lack of database variables. Actually it is possible to get the amount of these variables from database, I just don't know which variables to use. That is why I want to count it manually.

Answer 1

ColdFusion exposes a variable that tells you how many rows are returned in your query, without running a loop to count them:
<cfquery name="get_serial" datasource="#dsn3#">
SELECT *
FROM SERVICE_GUARANTY_NEW
WHERE STOCK_ID = #attributes.action_row_id#
ORDER BY SERIAL_NO
</cfquery>
<cfoutput>There are #get_serial.recordCount# rows.</cfoutput>
<cfoutput query="get_serial">
<p>#get_serial.serial_no#</p>
</cfoutput>

Answer 2

If I understand you correctly you can do it with a counter in your loop.
<cfset counter = 0 />
<cfloop query="get_serial">
<cfif PROCESS_ID eq attributes.action_id>
#SERIAL_NO#
<cfset counter ++ />
</cfif>
</cfloop>
<cfoutput>Output #counter# times!</cfoutput>
EDIT: to answer your follow up question:
<cfset counter = 0 />
<cfsavecontent variables="myContent">
<cfloop query="get_serial">
<cfif PROCESS_ID eq attributes.action_id>
#SERIAL_NO#
<cfset counter ++ />
</cfif>
</cfloop>
</cfsavecontent>
<cfoutput>
<p>Output #counter# times!</p>
<p>#myContent#</p>
</cfoutput>
Hope that helps!

Answer 3

Here's another couple answers, just for fun :), although having the counter is probably the best way since you're already incurring the performance hit of using the loop.
<cfquery name="getCount" dbtype="query">
SELECT PROCESS_ID FROM get_serial WHERE PROCESS_ID = #attributes.action_id#
</cfquery>
<cfset total = getCount.RecordCount />
And using lists, always fun:
<cfset total = ListValueCount(ValueList(get_serial.PROCESS_ID), attributes.action_id) />
Point being that there are a multiple ways to solve that kind of problem, so have fun :)