I may be misunderstanding this, but if you just do bidirectional mappings in JPA then the DB query is generally efficient and transparent. Could you post a little snippet showing what you're trying to do?
Derek On Mon, Apr 27, 2009 at 2:44 PM, TSP <tim.pig...@optrak.co.uk> wrote: > > Viktor, > It's a valid point, and I would where possible but I've got quite a > lot of uni-directional references (for example, addressable locations > in a city) where using a mapping would entail very large fetches that > are better handled by querying the database. Evans in Domain Driven > Design is very keen on uni-directional references and who am I to > argue :-) > Tim > > > On Apr 27, 9:10 pm, Viktor Klang <viktor.kl...@gmail.com> wrote: > > Why don't collection mappings work? > > > > Also, from personal experience, mixing persistence-logic in domain > objects > > does make you feel somewhat naughty. > > > > > > > > On Mon, Apr 27, 2009 at 9:15 PM, Tim P <tim.pig...@optrak.co.uk> wrote: > > > > > Hi > > > I'm looking for some guidance here and I don't think this is addressed > > > in the book. > > > > > I've got domain classes that need to go get stuff from the database > > > "list all ... " type of methods. > > > So presumably my domain class should have, or be allowed to have > > > methods that access Model > > > But my unit tests need to test these methods. So I need a model which > > > is instantiated within the test environment and so does not need to be > > > extended with RequestVarEM which presumably would be a bad thing > > > (though perhaps it's harmless). > > > Any suggestions on "best practice" to achieve this? (I'm still very > > > much trying to find my way round natural scala constructs) > > > > > Should it be mentioned in the jpa chapter in the book? > > > > > Tim > > > > -- > > Viktor Klang > > Senior Systems Analyst > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Lift" group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~----------~----~----~----~------~----~------~--~---
