1. How to Set Primary / Foreign Keys or Relationships with Hibernate 3 / JPA Tables? coderanch.comHello there... Created 3 JPA annotated classes: User: @Entity @Table(name = "user", schema = "test") public class User { /* Data Fields */ private int userid; private String username; private String password; public User() { } @Id @GeneratedValue(strategy = IDENTITY) @Column(name = "userid", unique = true, nullable = false) public Integer getUserid() { return this.userid; } public void setUserid(Integer userid) { ... |
2. Primary-Foreign Key relationship via hibernate coderanch.com |
3. How to setup simple one-to-one primary key relationship forum.hibernate.orgCurrently, I do not have a relationship setup. I just use a Long, but I want to change it to use a relationship. The documentation is a little foggy as to what is needed and where it goes when a one-to-one relationship is the primary key. Here is what I currently have, the commented part is what I've been trying to ... |
4. one-to-one relationship with same comp primary key forum.hibernate.orgI've got two tables, TableParent and TableChild: Code: +---------------+ +----------------+ | TableParent | | TableChild | +---------------+ +----------------+ | ... |
5. One to many relationship to composed primary key forum.hibernate.orgOK, I am trying to map a weak entity set in my mapping files. I have 2 tables: User - id (primary key) - ... Type - type_id - User_id Primary key(type_id, User_id) When I use it like this, I enforce the fact that there is only one type possible per User. Mapping file of Type: |
6. Primary key Foreign key relationship in hibernate forum.hibernate.orgHI , I have two tables EventObject and EventDetails.I want primary key of EventObject to be foreign key in EventDetails i.e mapping from EventObject to EventDetail shoud be one-to-many and the mappping is unidirectional it need not be bidirectional. My mapping files are as follows 1)EventObject |
7. Joining Table w/o Primary/Foreign Key Relationship forum.hibernate.orgI am new to Hibernation and facing an issue. I have Table1 and Table2 . Table1 has filed "server" and Table2 has field "machine" . Both means same thing(Can't change schema) I have a many to one relationship from Table1 to Table 2. class CTable1 { @OneToMany @JoinColumn(name ="server") //XXX could be the problem private List |
8. Creating a one-to-many relationship without the primary key. forum.hibernate.orgWell, you're getting the identifier, as specified in the mapping file, so it's working as it's supposed to. Why not just do a criteria query? It would make life so much easier, and it would allow you to work with your objects - you could just call the getRecordId or getMessageId or whatever method/property call that you want on the object ... |
9. Variable One-to-One Relationship with Unique Primary Key forum.hibernate.org |
10. parent key not found with primary key join relationship forum.hibernate.orgI have one-to-one relationship, When i try to save the master entity i get the following error "parent key not found". It it caused by that the slave entity is inserted first, It works fine after i set the foreign key to be deferred. but some database system does not support deferred check, so,what is the best way to handle this? ... |