How to update only one field using Entity Framework?
Here’s the table Users UserId UserName Password EmailAddress and the code.. public void ChangePassword(int userId, string password){ //code to update the password.. } 16 Answers 16
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PersistentObjectException: detached entity passed to persist thrown by JPA and Hibernate
I have a JPA-persisted object model that contains a many-to-one relationship: an Account has many Transactions. A Transaction has one Account. Here’s a snippet of the code: @Entity public class Transaction { @Id @GeneratedValue(strategy = GenerationType.AUTO) private Long id; @ManyToOne(cascade = {CascadeType.ALL},fetch= FetchType.EAGER) private Account fromAccount; …. @Entity public class Account { @Id @GeneratedValue(strategy = … Read more
How to fix the Hibernate “object references an unsaved transient instance – save the transient instance before flushing” error
I receive following error when I save the object using Hibernate object references an unsaved transient instance – save the transient instance before flushing 3Best Answer 31
PersistentObjectException: detached entity passed to persist thrown by JPA and Hibernate
This is a typical bidirectional consistency problem. It is well discussed in this link as well as this link. As per the articles in the previous 2 links you need to fix your setters in both sides of the bidirectional relationship. An example setter for the One side is in this link. An example setter … Read more
How to fix the Hibernate “object references an unsaved transient instance – save the transient instance before flushing” error
You should include cascade=”all” (if using xml) or cascade=CascadeType.ALL (if using annotations) on your collection mapping. This happens because you have a collection in your entity, and that collection has one or more items which are not present in the database. By specifying the above options you tell hibernate to save them to the database when saving their parent.
