not-null property references a null or transient value

Question

Facing trouble in saving parent child object with hibernate  Any idea would be highly appreciated   org hibernate PropertyValueException  not-null property references a null or transient value  example forms InvoiceItem invoice     at org hibernate engine Nullability checkNullability Nullability java 100                truncated    hibernate mapping    lt hibernate-mapping package  example forms  gt       lt class name  Invoice  table  Invoices  gt           lt id name  id  type  long  gt               lt generator class  native    gt           lt  id gt           lt property name  invDate  type  timestamp    gt           lt property name  customerId  type  int    gt           lt set cascade  all  inverse  true  lazy  true  name  items  order-by  id  gt               lt key column  invoiceId    gt               lt one-to-many class  InvoiceItem    gt           lt  set gt       lt  class gt       lt class name  InvoiceItem  table  InvoiceItems  gt           lt id column  id  name  itemId  type  long  gt               lt generator class  native    gt           lt  id gt           lt property name  productId  type  long    gt           lt property name  packname  type  string    gt           lt property name  quantity  type  int    gt           lt property name  price  type  double    gt           lt many-to-one class  example forms Invoice  column  invoiceId  name  invoice  not-null  true    gt       lt  class gt   lt  hibernate-mapping gt    InvoiceManager java  class InvoiceManager        public Long save Invoice theInvoice  throws RemoteException           Session session   HbmUtils getSessionFactory   getCurrentSession            Transaction tx   null          Long id   null          try               tx   session beginTransaction                session persist theInvoice               tx commit                id   theInvoice getId              catch  RuntimeException e                if  tx    null                  tx rollback                e printStackTrace                throw new RemoteException  Invoice could not be saved              finally               if  session isOpen                    session close                      return id            Invoice java  public class Invoice implements java io Serializable       private Long id      private Date invDate      private int customerId      private Set lt InvoiceItem gt  items       public Long getId             return id            public Date getInvDate             return invDate            public int getCustomerId             return customerId            public Set lt InvoiceItem gt  getItems             return items            void setId Long id            this id   id            void setInvDate Date invDate            this invDate   invDate            void setCustomerId int customerId            this customerId   customerId            void setItems Set lt InvoiceItem gt  items            this items   items            InvoiceItem java  public class InvoiceItem implements java io Serializable       private Long itemId      private long productId      private String packname      private int quantity      private double price      private Invoice invoice       public Long getItemId             return itemId            public long getProductId             return productId            public String getPackname             return packname            public int getQuantity             return quantity            public double getPrice             return price            public Invoice getInvoice             return invoice            void setItemId Long itemId            this itemId   itemId            void setProductId long productId            this productId   productId            void setPackname String packname            this packname   packname            void setQuantity int quantity            this quantity   quantity            void setPrice double price            this price   price            void setInvoice Invoice invoice            this invoice   invoice

User · Accepted Answer

Every InvoiceItem must have an Invoice attached to it because of the not-null  true  in the many-to-one mapping     So the basic idea is you need to set up that explicit relationship in code   There are many ways to do that   On your class I see a setItems method   I do NOT see an addInvoiceItem method   When you set items  you need to loop through the set and call item setInvoice this  on all of the items   If you implement an addItem method  you need to do the same thing   Or you need to otherwise set the Invoice of every InvoiceItem in the collection

User · Answer

I resolved by removing     Basic optional   false   property or just update boolean     Basic optional   true

User · Answer

This could be as simple as    Column name    Some Column   nullable   false    but while persisting  the value of  Some Column is null  even if  Some Column  may not be any primary or foreign key

User · Answer

I was getting the same error but solved it finally actually i was not setting the Object Entity which is already saved to the other entity and hence the Object value it was getting for foreeign key was null

User · Answer

Make that variable as transient Your problem will get solved     Column name  emp name   nullable false  length 30      private transient String empName

User · Answer

for followers  this error message can also mean  you have it referencing a foreign object that hasn t been saved to the DB yet   even though it s there  and is non null

User · Answer

Check the unsaved values for your primary key Object ID in your hbm files  If you have automated ID creation by hibernate framework and you are setting the ID somewhere it will throw this error By default the unsaved value is 0  so if you set the ID to 0 you will see this error

[hibernate] not-null property references a null or transient value

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