I am having difficulty with the behavior of a "bean". In this case a
document bean.
In my listener method I have
<cfset document = createObject("component", "model.document").init( ID
= arguments.event.getArg("id") ) />
This instantiates the document bean for the id passed in.
But for a new document there is no id. So I want to modify the above
instantiation to:
<cfset document = createObject("component", "model.document").init() /
>
What I expected was for this to create an "empty" document bean with
an id=0. Here's the relevant bean definition code:
<cfcomponent name="document" hint="This is a document Bean">
<cfset variables.id = 0 />
<cfset variables.name = "" />
<cfset variables.description = "" />
...
<cffunction name="init" displayname="init" hint="Bean for documents"
access="public" output="false" returntype="document">
<cfargument name="ID" type="numeric" required="false"
default="0"
hint="ID" />
<cfargument name="Name" type="string" required="false"
default=""
hint="NAME" />
<cfargument name="Description" type="string" required="false"
default="" hint="DESCRIPTION" />
...
<cfset setID(Arguments.ID) />
<cfset setName(Arguments.Name) />
<cfset setDescription(Arguments.Description) />
...
<cfreturn this />
</cffunction>
<cffunction name="getId" access="public" hint="Getter for id"
output="false" returntype="numeric">
<cfreturn variables.id />
</cffunction>
<cffunction name="setId" access="private" hint="Setter for id"
output="false" returntype="void">
<cfargument name="id" hint="ID" required="yes" type="numeric" />
<cfset variables.id = arguments.id />
</cffunction>
(... more getters and setters here...)
</cfcomponent>
The ID is of type "numeric" but is not required and defaults to 0. But
I get a framework error:
Mach-II Exception
Message: The ID argument passed to the init function is not of type
numeric.
Detail: If the component name is specified as a type of this argument,
its possible that a definition file for the component cannot be found
or is not accessible.
Extended Info:
Tag Context:
.../model/document.cfc (36)
.../listeners/documentListener.cfc (59)
If I explicitely pass in a 0 for ID I believe it will accept it. But
I was expecting the bean to accommodate the null parameter list and
default to the default ID=0 which is numeric. I'm also not sure what
the Details in the error means. Why won't the bean construct a default
bean with no parameters passed in?
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