Some Inquiry on Database Records

Following rentz 15 minutes guide in webobjects leads me to concluding 
question, cause actually i have to do some manual calculation before 
i store a data into its corresponding table.

Ive followed this set of code for adding. ex:

-----------------------------------------------------------

EOEditingContext ec = session().defaultEditingContext();
EOEnterpriseObject ne = EOUtilities.createAndInsertInstance
(ec, "UserInfo");
		
  ne.takeValueForKey(u_nme, "usr_name");
  ne.takeValueForKey(u_pwd, "usr_pass");
	
  u_nme = u_pwd = null ;
		
  ec.saveChanges();
		
return null;

-----------------------------------------------------------
and based on the guide, it uses WORepetion with these code:
-----------------------------------------------------------
    /** @TypeInfo NwsCategory */
    public NSArray catEntries(){
        return EOUtilities.objectsForEntityNamed(session
().defaultEditingContext(), "UserInfo");
	}
-----------------------------------------------------------
now with these approach, im planning to display let say for example 
the unique id given as it displays the username and password in a 
link form, so that when clicked. it can edit or delete the said data.

im stuck with this idea, dont know where to continue.

-----------------------------------------------------------

Any help from you guys would be greatly appreciated, since im still 
learning on using Webobjects.







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