Question

Is it possible in ColdFusion that a non-persistent property could have a dynamic value?

An example would be

   Item.cfc

   property name="myID" length="100"    type="string"   fieldtype="id" generator="guid";

   property name="hasImageFlag"  persistent=false  default="{isNull(getItem().getIcon())};

   property name="Icon"  fieldtype="many-to-one" fkcolumn="imageID" cfc="image" lazy="true";

So in this example hasImageFlag could just be isNull(getItem().getIcon()) which would return true or false.

Answer 1

No, you cannot do that in cfproperty. For two reasons.

1. It simply does not allow a dynamic default. So you can’t even do default=”#arrayNew(1)#”

2. In your case, the getItem() method of this class will not exist yet while this code is running.

When I have needed dynamic defaults, I have done it in the init() constructor method so that it happens immediately after the object is created.