RE: [CFCDev] Just starting CFC's -- Session Question

[Hardy Jonck]

Ok now that you have a Application.cfm - great. But you can still run into problems.   cfinvoke creates a new object and then destroys it after the request is completed. With the way you are doing it, your component just lives for the request event. I would do it like this.    But further than? In Application.cfm page:   <cfapplication name="ShoppingApplication" sessionmanagement="yes" />   // and, you setup your session something like: <cfif not isDefined("cookie.userID")>  <cfcookie name="userID" value="#createuuid()#"/> </cfif>   cfif (not isDefined("session.user")) or (session.user.userid neq cookie.userID)><cfscript>  cftrace(text="Init Session variables like user and MainViewController" ,category = "Execution Trace");  session.user = createObject("component", "user");  session.user.init(userid=cookie.userID);  session.shoppingCart = createObject("component","cartModule");  session.shoppingCart.init(); // If you do not place the init in the Component 'autorun' section (ie between the <component> tag and before any <cffunction tags </cfscript></cfif> // End Application.cfm   Assuming that is done:   When you invoke a cfc from the web with CfObject.cfc?method etc - it creates a new instance - and maps the Form vars to method arguments where applicable. Note that if this cartModule instance does not have ANY relation to the one in the session - it is a new one created in response to the post from the cfm page. This means that in your cartModule method that accepts the post - you have to dispatch further calls to the session.shoppingCart  instance of cartModule. I would do this like this:   <cfcomponent name="ShoppingCart"><cfscript>     // Public Instance Vars            // Private Instance Vars     shopingItems = ArrayNew(1);             function addCart()     {         var newItem = StructNew();         newItem.quantity = url.qty;         newItem.id = url.id;         arrayAppend(shopingItems,newItem)     }     function getCartItems()     {         return duplicate(shopingItems);     } </cfscript> <cffunction name="shopingCartDispatch" access="remote" output="Yes">  <cfargument name="mode" default="viewCart" />  <cfscript>     <cftrace text="Executing: " & #shoppingCart# & " from shopingCartDispatchmethod" category="Execution Flow" />      <cfset evaluate("session.shoppingCart." & mode & '()') />  <!--- This is the key Bind to instance in Session.... --->  </cfscript>   <cfinclude template="MainView.cfm" /> </cffunction>   <cffunction name="fiewCart" output='Yes" .......   Anyway hope that helps   Cheers Hardy -----Original Message----- From: Paul Giesenhagen [mailto:[EMAIL PROTECTED] Sent: 03 October 2003 17:10 To: [EMAIL PROTECTED] Subject: [CFCDev] Just starting CFC's -- Session Question I am just now starting my learning on CFC's and having issues with sessions .. it is quite frustrating.   I created a VERY simple little input for building an array populated with a struct and then sticking it into a session.   I am not getting any session information from the calling CFM page .. if I set the session inside of the CFC.   Can anyone see what I am doing wrong?   If I run cart.cfm?mode=addCart  (I see the session set in the CFC -- cfdump)   AND then Run cart.cfm?mode=viewCart it says cartData is undefined in SESSION.   <!--- Calling CFM page ---> <cfparam name="url.mode" default="">   <cfswitch _expression_="#url.mode#">  <cfcase value="delCart">   <cfset variables.foo = StructDelete(session, "cartData")>  </cfcase>  <cfcase value="addCart">   <cfparam name="url.qty" default="1">   <cfparam name="url.id" default="1">   <!--- <cfobject type="component" name="addCart" component="test.components.cartModule"> --->   <cfinvoke component="test.components.cartModule" method="addCart"/>  </cfcase>  <cfcase value="viewCart">   <cfdump var="#session.cartData#">  </cfcase> </cfswitch>     <!--- cartModule.cfc ---> <cfcomponent displayname="cartModule" hint="manages  Items to the Cart">  <cffunction name="addCart" output="true" displayname="Adds Cart Stuff" hint="Adds Cart Stuff">   <cfif IsDefined("session.cartData")>    <cfset cartLen = ArrayLen(cart) + 1>    <cfset cart[cartLen] = structNew()>    <cfset cart[cartLen].qty = url.qty>    <cfset cart[cartLen].id = url.id>   <cfelse>    <cfset cart = arrayNew(1)>    <cfset cartLen = ArrayLen(cart) + 1>    <cfset cart[cartLen] = structNew()>    <cfset cart[cartLen].qty = url.qty>    <cfset cart[cartLen].id = url.id>   </cfif>   <cfset session.cartData = cart>   <cfdump var="#session.cartData#">  </cffunction>  </cfcomponent>     Also: If I call this component via CFOBJECT the <CFDUMP in the function doesn't display anything -- If I use <CFINVOKE it displays the dump.   Thanks Paul Giesenhagen QuillDesign