Re: findReferencing?
[email protected] Tue, 07 Jul 2009 10:39:26 +1000
| Newsgroups | gmane.comp.java.orm.simpleorm |
|---|---|
| Message-ID | <[email protected]> |
A good question, and the answer is no. Suppose one performed a query to select Employees in Sales where Salary > 100000 order by Name What would you expect findReferencing to return? All employees, or just those queried? And how sorted? And what use is an unsorted list? So instead we make the query explicit List<Employee> employess = new SQuery(Employee.EMPLOYEE).eq(Employee.DEPARTMENT, d100q) This makes the semantics clear, is much more flexible, and is hardly any more typing. (Hibernate is a mess in this area, because it tries to impose the low level Object Oriented model of associations on the higher level realational database.) You can also query the DataSet for all Employees that are in memory, and then filter that. It can be used while the DataSet is detached from the database. Regards, Anthony At 09:52 AM 7/07/2009, you wrote: >How do you feel about having a findReferencing method in SRecordInstance, just like the existing findReference there? > >That'd make it just as easy to lazily fetch the one-to-many as the many-to-one relationship. > >E.g. >Already: >Department department = employee.findReference(employee.DEPARTMENT); > >Proposing also: >List<Employee> employess = department.findReferencing(employee.DEPARTMENT); > >Thanks, >Josh > > Spreadsheet Detective, Southern Cross Software Queensland Pty Limited 54 Gerler Street Bardon, Queensland 4065, Australia. Email: [email protected] www.SpreadsheetDetective.com Ph: +61 427 830248 (Australian Eastern Standard Time) "If the model seems correct only because the numbers look right, then why build the model in the first place?" ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/SimpleORM/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/SimpleORM/join (Yahoo! ID required) <*> To change settings via email: mailto:[email protected] mailto:[email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
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