Problem to persist child entity in EJB

Question

My entity bean named Stock contain

@OneToMany(fetch=FetchType.LAZY,cascade=CascadeType.ALL)
@JoinColumn(name="stockid")
private List<StockSize> stockSizeList = new ArrayList<StockSize>();

My StockSize entity bean contain one field stockid from Stock

Below is the code to set Stock entity value

Stock stock = new Stock();
    stock.setDesignCode("123design");
                stock.setLotNo("123lot");
                stock.setCreatedByUserId(getIBusinessDelegateOperationSessionContext().getUserId());
                stock.setCreatedDate(new Date());
                stock.setIsSystemRecord(StaticTableConstants.NOT_ISSYSTEMRECORD);
                stock.setLastModifiedDate(new Date());
                stock.setLastModifiedByUserId(getIBusinessDelegateOperationSessionContext().getUserId());


    stock.setStockSizeList(listStockSize != null ? listStockSize : new ArrayList<StockSize>());

Its gives an error as it can't get stockid when container persist StockSize

So is there any post-persist type of thing in EJB3.0 i.e StockSize persist after persisting stock ?

or only one solution that i have to persist both entity separate.

score 0 · Accepted Answer · answered Jun 10 '11 at 06:41

since i don't know what error you get or how your code persists i can only guess (hint *hint*)

but a common Point when dealing with Y-To-X-Relationships is that the parent (here "Stock") cant be persisted before its children (here "StockSize"). Of cause if stockSize has a x-To-Y relationship with stock than you have to persist the empty objects first and insert the relationships as and update.

If this doesn't solve your problem please post your stacktrace.

Problem to persist child entity in EJB

1 Answers1