----- Original Message -----
From: "Owens, Howard" <[EMAIL PROTECTED]>
To: "CF-Talk" <[EMAIL PROTECTED]>
Sent: Wednesday, December 26, 2001 5:36 PM
Subject: Pulling My Hair Out (a shopping cart question)
> <cflock timeout="#createtimespan(0,0,30,0)#"
> name="#session.sessionID#"
> type="EXCLUSIVE">
A cflock timeout value is specified in seconds. Using CreateTimeSpan() with
30 minutes gives you a CF date/time object of 1/48th, or 0.625. Just
specify a whole number of seconds. I've never really seen a guide to
determining intelligent cflock timeout values, so I just use something like
5 or 10 seconds.
> session.cart = ArrayNew(1);
> session.item = StructNew();
> session.item.PRODUCT_ID = 0;
> session.item.NAME = "#FindItem.SONG_TITLE#";
> session.item.DESCRIPTION = "#FindItem.ARTIST_FIRST_NAME#
> #FindItem.ARTIST_LAST_NAME#";
> session.item.QUANTITY = 1;
> session.item.PRICE = "#request.songprice#";
> session.item.ITEMTOTAL = "3";
> session.item.SONG_ID = "#FindItem.SONG_ID#";
In this block of code, session.item is just used as a temporary variable, so
create it in the variables (or the request) scope. As a rule, you should
minimize the amount of code encapsulated by a cflock, so this would help
toward that goal, since you can create and define the struct outside of the
lock.
>
> session.CartItems = ArrayAppend(session.cart, session.item);
>
Could this be the source of the problems you're having? Did you mean to do
this, or do you mean:
session.cart = ArrayAppend(session.cart, session.item);
Simplified, the code becomes something like:
<cfscript>
item = StructNew();
item.PRODUCT_ID = 0;
item.NAME = "#FindItem.SONG_TITLE#";
item.DESCRIPTION = "#FindItem.ARTIST_FIRST_NAME#
#FindItem.ARTIST_LAST_NAME#";
item.QUANTITY = 1;
item.PRICE = "#request.songprice#";
item.ITEMTOTAL = "3";
item.SONG_ID = "#FindItem.SONG_ID#";
</cfscript>
<cflock name="#session.sessionID#" type="EXCLUSIVE" timeout="5">
<!--- If no shopping cart exists, create one --->
<cfparam name="session.newcart" default="no">
<cfif session.newcart is "no">
<cfset session.cart = ArrayNew(1)>
<cfset session.newcart = "yes">
</cfif>
<!--- Add item to the cart --->
<cfset session.cart = ArrayAppend(session.cart, item)>
</cflock>
Jim
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