I am not able to store the children to the parent at a time using onetomany

[venra]

Please help me with my issue. 

This sample i took from Openjpa samples. 

two classes 

InventoryCategory.java

@OneToMany(targetEntity=gov.ssa.rome.model.InventoryItem.class, 
                cascade=CascadeType.ALL, 
                mappedBy="category")
    public List<InventoryItem> getItems() 
    { 
        return items; 
    }


InventoryItem.java
@ManyToOne
        @JoinColumn(name="CAT_ID", nullable=false)
        public InventoryCategory getCategory()
        {
            return category;
        }


I am trying to use like this below in my Test.java


InventoryCategory cat = new InventoryCategory();
        cat.setCategoryName("testname");
        cat.setCategoryDescription("testdescription");

List<InventoryItem> items= new ArrayList<InventoryItem>();

InventoryItem item = new InventoryItem();
        item.setItemName("name");
        item.setItemDescription("description");
        item.setItemPrice(1);

items.add(item);

cat.setItems(items);

em.persist(cat);//expecting to save all the items and category in there
respective tables with this call. 

but it is not happening.

May i know how this onetomany work if i want my expected result to happen?

Thanks in advance.

-Venra






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