:( it's not.
the sort column lives purely in the relational join table, and is not
associated with any fields in the target entity.
Michael Dick wrote:
> Hi,
>
> If the sort column is a mapped field in the target entity you can use
> "vanilla" JPA. Something like this should work for you :
>
> @Entity
> public class FLeague extends HBaseIdCreateTime {
> ....
> @ManyToMany
> @OrderBy("${fieldName} ASC")
> private List<FTeam> draftOrder;
> ....
> }
>
> Replace ${fieldName} with the name of the field in the target entity and you
> should be good to go. If you don't specify a fieldname we'll sort by primary
> key.
>
> Regards,
> -mike
>
>
> On Fri, Oct 24, 2008 at 12:26 PM, Fernando Padilla <fern@alum.mit.edu>wrote:
>
>> So, again, I'm trying to port from old JDO to new JPA :) And I'm trying to
>> map a List object, where the relational table is storing the position of
>> each element. It looks like standard JPA doesn't want to support this, but
>> I was wondering if OpenJPA had this as an option in some way...:
>>
>>
>>
>>
>> And I have this sort of relational join table.
>>
>> mysql> desc FLEAG_DRAFTORDER;
>> +------------------+------------+------+-----+---------+-------+
>> | Field | Type | Null | Key | Default | Extra |
>> +------------------+------------+------+-----+---------+-------+
>> | DRAFTORDER_JDOID | bigint(20) | YES | MUL | NULL | |
>> | DRAFTORDER_ORDER | int(11) | YES | | NULL | |
>> | JDOID | bigint(20) | YES | MUL | NULL | |
>> +------------------+------------+------+-----+---------+-------+
>> JDOID -> FLEAGUE
>> DRAFTORDER_JDOID -> FTEAM
>> DRAFTORDER_ORDER -> LIST_INDEX_POSITION
>>
>>
>>
>>
>> The owning class has a field:
>>
>> @Entity
>> public class FLeague extends HBaseIdCreateTime {
>> ....
>> @ManyToMany
>> private List<FTeam> draftOrder;
>> ....
>> }
>>
>>
>> @Entity
>> public class FTeam extends HBaseIdCreateTime {
>> ....
>> }
>>
>
|