Custom Tag and CFC : Nate Weiss

Question

Hi,
being a beginner I'm trying with some marginal degree of
success to understand CFC's and Custome Tags.
In the CFMX7 W.A.C.K. There is an example shopping cart. This
start off as a basic affair then expands into more object based
principles using a custom tag add products to the cart
(ShoppingCart.cfc) and later on the same page uses a custome Tag to
display the cart items, calling it once for each item to display.
I am using the MVC structure under Fusebox 4, so this method
of using the same template, (reloading etc) is alien to me as with
MVC you usually have the data type intructions in different files
(anyway, I digress)
Now that I have the thing adding products and generally
working with my "shop", I thought about having a "special offer"
facility. With these "Hot Deals" being stored in another database
table, with their productID and new price.
However, obviously the shopping cart needs to be made aware
of this. With I would have thought an extra variable in the array
telling the custom tag to retrieve the special price and the
product information using a diufferent inner join query to normal.
I have attemtped this by adding an additional URL parameter
thus /..../HSOP/Y ("Has Special Offer Price" being set to "Y")
When this reloads the page the CFC invoke is set thus
<CFIF IsDefined("URL.HSOP") AND #URL.HSOP# EQ "Y">
<CFINVOKE
COMPONENT="#SESSION.MyShoppingCart#"
METHOD="Add"
MERCHID="#URL.AddMerchID#"
SOPH="Y">
<cfelse>
This successfully passes
Add(SOPH = Y, MERCHID = xxxx)
to the CFC. However I get this error......,
..................Element SOPH is undefined in ARGUMENTS.
the CFC simpley isnt adding the new variable to the array...
I think... it wont do a CFDump so there is no way of telling
<CFFUNCTION
NAME="Add"
HINT="Adds an item to the shopping cart">
<!--- Three Arguments: MerchID, Quantity and SOPH (flag
to state if there is a special price) --->
<CFARGUMENT NAME="MerchID" TYPE="numeric"
REQUIRED="Yes">
<CFARGUMENT NAME="Quantity" TYPE="numeric" REQUIRED="No"
DEFAULT="1">
<CFARGUMENT NAME="SOPH" type="string">
<!--- Get structure that represents this item in cart,
--->
<!--- then set its quantity to the specified quantity
--->
<CFSET CartItem = GetCartItem(MerchID)>
<CFSET CartItem.Quantity = CartItem.Quantity +
Arguments.Quantity>
<CFSET CartItem.SOPH = Arguments.SOPH>
</CFFUNCTION>
I cant see why this wouldn't create the variable
"CartItem.SOPH" and set it to "Y" as passed to it.
I notice the CFC performs an iteration of sorts to put the
cart items into an array. But I'm afraid I cant fathom what this
problem might be.
Any ideas. I have attached the whole CFC code (post editing
by me)
MAny thanks and Happy new Year

Answer 1

Hi,
As for me, I am testing the related pdf-417 barcode scanner these days. Do you have any ideas about it? Or any good suggestion? I am totally a green hand on barcode field. Any suggestion will be appreciated. Thanks in advance.
Best regards,
Arron