On 08.06.2007 10:17, Derek Hohls wrote:
PS : re the database call issue " you usually keep all possible values in one table and the n:m association between objects and these values in another one." This is true; but a RIGHT JOIN (or LEFT JOIN) will return possible AND linked values in a single SQL statement.
The retrieval of possible and actual values are two different issues and should be separated as it is done in Cocoon. The possible values are part of the form model (and so fd:item) while the actual values are part of the data model (and so they become a form instance).
Even retrieving them in one statement is not a good idea. It's not replaceable with an O/R mapper since you don't place the possible values in the domain object. What about creating a new instance of such an object. How to retrieve the possible values if there are no actual values in the database? And imagine a repeater. Do you want to retrieve the possible values for each entry in the repeater?
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