1. Is it bad practice to use DiscriminatorFormula for migration of Hibernate databases? stackoverflow.comI have an application using Hibernate for data persistence, with Spring on top (for good measure). Until recently, there was one persistent class in the application, A: |
2. DiscriminatorFormula stackoverflow.comIf I have a single table where I need multiple columns for discriminator, is my only solution to use a @DiscriminatorFormula? I ask because some prototyping gave us some results that I ... |
3. hibernate saving multiple hierarchy records coderanch.comI have mapping like - User has many Order Order has many OrderItem OrderItem has one Address. When a user make order - I have to save User, Order, OrderItem, Address in database. In my DAO, I am saving record for Order as getSession().save(OrderData); I have to further save Orderitem and Addresses. Please guide me how do I do save records ... |
4. Depth of the hierarchy to be saved forum.hibernate.orgIs there any way I can tell hibernate to go ahead and save only "n" level deep? What i mean is that lets say we have an item (parent class), which has fields and a field can be a list (of items). So can i tell to go to a specific level for saving? |
5. Not persisting data more than 2 levels of hierarchy forum.hibernate.orgI have 3 levels of classes a) @MappedSuperclass public abstract class CmpntObject implements Comparable, Serializable { @Column(name = "enabled") private Boolean enabled = Boolean.TRUE; } b)@Entity @Table(name = "asmnt_item", schema = "public") @DiscriminatorColumn(name = "question_type_enum", discriminatorType = DiscriminatorType.STRING) public abstract class Item extends CmpntObject implements Comparable { @Column(name = "valid") private Boolean valid = Boolean.TRUE; other columns.. } c) @Entity @DiscriminatorValue(value ... |
6. Persisting Class conversions in a Class Hierarchy forum.hibernate.orgSay I have a Class hierarchy, where Parent and Child both extend Person. I have the mapping set up so that the whole hierarchy persists to one table, called Person. I persist an instance of Person to the table. At some point I obtain further information about this particular Person, and so now want to convert to the Parent class and ... |
7. Problem with bulk update and hierarchy forum.hibernate.orgI have a problem when i try to make an update using hibernate My project has the structure of a single parent class, and all the others class extending from the parent. When i try to update a field in a subclass table i get the exception: Code: 16:22:45,140 INFO [STDOUT] org.hibernate.HibernateException: no table name defined for insert-select ... |
8. update of table per hierarchy forum.hibernate.org@javax.persistence.Entity(name="Card") @javax.persistence.Table(name="Card") @javax.persistence.DiscriminatorColumn(name="type") @javax.persistence.Inheritance(strategy=InheritanceType.SINGLE_TABLE) public class Card { @javax.persistence.Id Integer id; @javax.persistence.Basic String type; @javax.perisistence.Basic Integer status; } @javax.persistence.Entity(name="PhyCard") @javax.persistence.DiscriminatorValue("Phycard") @javax.persistence.SecondaryTable{name="PhyCard", pkJoinColumns={@javax.persistence.PrimaryKeyJoinColumn(name="id")} ) public class PhyCard extends Card { @javax.persistence.Basic Integer bw; } |