Well, since we are focusing on reusing and learning CFCs, it would be great if we could move our logic from our page into the CFC. You can have a look at Chapter 2, Basic CFCs and Database Interaction, if you want to see the CFC that we were building for the product table. A constructor is used to get a CFC set up for use. Some CFCs do not require it, while others do. Obviously, this one requires a constructor as it has an attribute that is required, dsn. We have the following:
<cfcomponent output="false" extends="_sdo">
<!--- Constructor Methods --->
<cffunction name="init" access="public" output="false">
<cfargument name="dsn" required="true">
<cfargument name="id" default="0">
<cfscript>
variables.field.name = "id,name,description,price";
variables.field.defaults = "0,'','',0";
variables.field.allowNull = "0,0,0,0";
variables.table = "product";
variables.pKeyField = "id";
variables...