Thanks for your reply Jaime so am i correct in understanding that i should have a project class with methods such as add, remove, find etc... and properties such as name etc... and a test class with much the same methods and attributes, and a materials class, again with much the same attributes
then in order to create a collection of the objects so i can manipulate and query the collections i should use dao (and gateways) is this what you mean? apologies, i understand the basic principles of OO but this is the first time i am putting it into practise!!! thanks again >Start with just a pure object model. Later you can pick it apart and patch >up the bits that don't map real well to CF. > >So, Projects have Tests. To me, that says that you have a Project class >with an instance variable Tests. Tests is a collection that has methods >like add, remove, find etc. The elements of the Tests collection are >instances of the Test class. > >Instances of Test *may* have an instance variable Project, which points to >the parent project - or may not. The benefit is flexibility in navigating >between objects, the downside is another reference you have to manage. I >tend to add these "back pointers" when and if I need them. > >Ditto for the tests->materials relationship. > >OK, so how do you do this in CF? The biggest mismatches are: >1) no built-in collection classes >2) the need to avoid instantiating lots of objects > >The usual workaround is to build the "collection object" as a (or with a) >DAO (see also Gateway) and return a CF query from any method that might >return more than one item. Within the DAO you can go crazy with naked SQL, >or abstract the SQL with a framework, or both. > >Just keeping this brief for the moment, but ask for more detail and you >shall receive. > >Jaime Metcher > >> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;192386516;25150098;k Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:306031 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
