1. Refactoring a Hibernate entity into subclasses stackoverflow.comI have a class that is currently mapped as an entity in a database table using Hibernate. This class should be refactored into an abstract class containing some field common to ... |
2. Hibernate/NHibernate : how to persist subclass as instance of superclass stackoverflow.comI have two classes I would like to persist via NHibernate: - Cat, which has a name and an Id, - Kitten, which is a subclass of Cat (no extra public properties). For stupid ... |
3. Cannot use identity column key generation with |
4. With Hibernate, can I mix table-per-subclass and a stackoverflow.comI'm attempting to map an object model for "Promotions"; i.e., a customer enters a promo code during signup. Different promo codes might have different types of "benefits", meaning what we are ... |
5. jpa how to create new entity with same id as parent entity (JOINED Inheritance) stackoverflow.commy question is very similar to http://stackoverflow.com/questions/1118873/changing-the-type-of-an-entity-preserving-its-id, but instead i´m using InheritanceType.JOINED instead of Table_per_class. This means i don´t to change any table, just to create a new subclass, with the ... |
6. JPA Inheritance demands ID in subclass stackoverflow.comI have a problem with my jpa domain model. I am just trying to play around with simple inheritance for which I use a simple Person base-class and and a Customer ... |
7. multiple discriminator columns for persistent subclasses stackoverflow.comI have banged my self with a very particular problem. Using OpenJPA (KODO 4.1) is there a way to use more than one column as a discriminator column? My problem is that ... |
8. hibernate subclass one to one mapping stackoverflow.comi got a complicate mapping, i think it suppose to work...but why it compile A.d column is not existed??? |
9. how to map a one-to-many collection to a joined subclass when key is in the parent class stackoverflow.comI'd like to map a one to many collection to a subclass but the key of the collection is an attribute of the parent class. Currently i'm mapping AbstractFoo Foo and Bar ... |
10. Efficiency of Hibernate's table-per-subclass inheritance strategy stackoverflow.comI'm thinking about table layout for a Hibernate-managed class hierarchy, and certainly the table per subclass technique strikes me as the most appropriate in a general sense. However, thinking through ... |
11. Mapping Hibernate "Custom" Subclasses stackoverflow.comAs a new Hibernate user, I have heard that a good pattern for adding some helper methods to generated classes is to add them in a subclass. For example: |
12. Criteria query with restriction across a joined subclass problem stackoverflow.comI have the following graph: |
13. Hibernate -using Table per subclass - how to link an existing superclass object to a sibclass object stackoverflow.comI have a User hibernate class, Clerk class and Consumer class. All these maps to their own tables in database. The User PK also acts as Clerk's and Consumer's PK. So ... |
14. Hibernate Subclass which has multiple discriminator values stackoverflow.comHello I have a Subclass which needs to cover multiple Discriminator Values. something like: @DiscriminatorValue(value = "ACT","DNR","ATT" ) would do me perfect. we have existing data where several discriminators can be mapped to one ... |
15. Hibernate: What's wrong with this mapping to a subclass joined on foreign key? stackoverflow.comI am experimenting with Hibernate to gain experience. I created a class |
16. Can I reuse a column across subclasses in a Hibernate table-per-hierarchy inheritance strategy? stackoverflow.comIn a simple inheritance tree, an abstract superclass has two subclasses. The subclasses both store a key-value pair, but but one will be holding a type Encrypted String, and the other ... |
17. Hibernate: How do I link a subclass to its superclass? stackoverflow.comI'm having a little problem setting up my webshop project. Thing is, I have a User() superclass and two subclasses, PrivateUser and BusinessUser. Now, I'm not quite sure how to get my ... |
18. Mixing table per subclass and per hierarchy in hibernate stackoverflow.comIn my database there are two three tables. The first one, table ABSTRACT, holds three columns |
19. Hibernate subclass with foreign key relationships stackoverflow.comI need some help defining the following object hierarchy/ database relationship in Hibernate From the object sense – Agent is inherited from Person and Agency is inherited from Organization. they are inherited ... |
20. Jpa subclass mapping stackoverflow.comI am making a POS like system. I wonder how to map subclass using JPA (this is for my DAO). |
21. Persist subclass as superclass using Hibernate stackoverflow.comI have a subclass and a superclass. However, only the fields of the superclass are needed to be persist. |
22. Hibernate transform instance to subclass stackoverflow.comI have mapped class in JPA. : |
23. 'table per subclass' or 'table per class hierarchy' stackoverflow.comI am using FNHibernate and its default is 'table per subclass' for inheritance mapping. This seems to be the cleanest way to do things but it has its downsides too. My ... |
24. Setting subclass primary key as auto_increment using JPA 2 annotations stackoverflow.comI'm trying to generate a database schema for my project using hbm2ddl. I'm using JPA 2 annotations to specify how the schema should look like. Right now I'm having some issues ... |
25. Can I use CompositeId on subclasses of Discriminated Entity Hierarchy? stackoverflow.comI have a entity hierarchy has single table for all subclasses strategy. And I want to use each properties - mapped @ManyToOne - as primarykey. When I put @Id annotation, ... |
26. Is it possible to use different inheritance strategy for subclasses? stackoverflow.comI currently have a mapping problem and no idea how to solve it. Here is what we currently have.
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27. Using JAXB to pass subclass instances as superclass stackoverflow.comWhat I have is a set of Java classes (close to 25) representing message types. They all inherit from a Message class which I'd like to be abstract. Each ... |
28. JPQL exclude subclasses in a query stackoverflow.comIf I have a class Apple that extends Fruit, how do I write a JPQL query to return all objects that are strictly Fruits and not Apples? |
29. Retrieve Collection of Subclasses Based on Column Value stackoverflow.comThe title is a bit weird, so let me clarify. I have two objects, Garage and Vehicle, in a one-to-many relationship. There are multiple types of vehicles, such as car and ... |
30. Hibernate - force inner join between parent and subclass stackoverflow.comI have a parent class |
31. Inheritance Joined Strategy With Multiple Non-Keyed Columns stackoverflow.comI have two classes |
32. hibernate mapping of subclass and individual fields stackoverflow.comI have this class hierachy: |
33. JPA discriminator column problem stackoverflow.comHallo all. I have this set of classes: |
34. How to convert an ORM to its subclass using Hibernate? stackoverflow.comFor example, I have two classes : Person and Employee (Employee is a subclass of Person). Person : has a lastname and a firstname. Employee : has also a salary. On the client-side, I ... |
35. Can I use subclass properties in Hibernate Criterion Example? stackoverflow.comI have a class-hierarchy: |
36. Hibernate error: one-to-one mapping on superclass and subclass stackoverflow.comI'm working on a project with Hibernate and MySQL, use annotation for mapping database to data object model. I need to mapping one-to-one between superclass and subclass on ID primary key ... |
37. Is it possible to map a superclass and subclass by OneToOne relationship in Hibernate? stackoverflow.comIs it possible to map a subclass to its superclass by OneToOne relationship base on their primary key properties in Hibernate? How can I implement this? |
38. Map superclass and subclass to different tables in Hibernate stackoverflow.comI want to map a class to a table and a subclass to another table. I'm not sure if you can do this in a proper way. I tried this so ... |
39. Hibernate one-to-one mapping between 2 subclasses stackoverflow.comHow can I make an one-to-one relationship between 2 subclasses when they do not have the ID property? Because each of them was inherited the Id property from superclass so I ... |
40. How to override the collection element type in subclass in hibernate? stackoverflow.comFor example, a Tiger is a Cat, but Tiger won't have any Cat child: |
41. Nhibernate/hibernate Avoid Insert in joined table or view stackoverflow.comI have to join a entity with a view to retrieve some data into properties |
42. Nhibernate / hibernate discriminator in subclass stackoverflow.comI have a subclass with a discriminator, can i have another discriminator in a subclass |
43. Ejb 3.0 - Table per subclass - Unknown entity: ejb.entity.RubricaBean stackoverflow.comHello I have this problem using table per subclass: |
44. Hibernate cannot create joined sub-class table while using annotation stackoverflow.comI am new to Hibernate and I cannot create joined sub-class table while using Hibernate annotation. Here is my code. This is the main class. |
45. org.hibernate.InstantiationException: How to tell Hibernate which class to use for object instantiation stackoverflow.comI am currently trying to replace my own database controller implementation with Hibernate and I have the following problem creating an appropriate mapping file. (I am very new to Hibernate, so please ... |
46. Can I use annotations to set up "Table per subclass: using a discriminator: fetch=select" stackoverflow.comI found that I can query without any joins when using "Table per subclass: using a discriminator". It is nice for my condition to consider some performance problems. However, I could not ... |
47. With Hibernate joined-subclasses, is it possible to duplicate columns in super and sub-tables *and* keep them in sync? stackoverflow.comSo I have an interesting situation. I've inherited a big mess of code where the original developer decided to forego using inheritance in favor of enums and switch statements...it's a ... |
48. Hibernate discriminator column with table per subclass stackoverflow.comRight now I am using a table per subclass approach to model my data. A simplification of my hierarchy is: |
49. JPA. How do I subclass existing entity and keep it's ID? stackoverflow.comAssume I have two classic non-abstract JPA classes: Person and Student. |
50. Fluent Hibernate Mapping hitch - passing wrong column name for subclass stackoverflow.comI finished following the summer of nhibernate screen casts and am trying to convert it to fluent, just for the sake of knowledge. I have two classes (very simple) |
51. How do I override mappedBy in subclasses when using Single table inhertiance with Hibernate? stackoverflow.comI've got 2 implementations of and abstract class Group - AGroup & BGroup |
52. Mixing |
53. Find on different properties on multi subclass stackoverflow.comI have 3 entities |
54. JPA/Hibernate - How is subclass type determined when querying by superclass? stackoverflow.comI just noticed this bevahior in Hibernate and found it a bit surprising (in a welcome kind of way). I have a single entity type called |
55. How to distinguish subclasses as property in other entity in Single Table Inheritance stackoverflow.com |
56. Unknown entity issue for joined subclass when using annotation stackoverflow.comI met exception when using annotated joined subclass, i don't know how to correct it, please help.
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57. Possible to query a database with subclass entity stackoverflow.comOk, lets say I have a model. |
58. Hibernate subclass to override a column stackoverflow.comWe have an Entity library untouched by our web stack, but our web stack would like to extend existing columns on existing entities with validation constraints. Here's one example of ... |
59. Does it make sense to use JPA's 2.0 @Inheritance annotation to a subclass? stackoverflow.comI was wondering if it makes any sense (or even if it is correct) to annotate every class of a hierarchy with @Inheritance. For example, suppose we have the following simple ... |
60. Hibernate: Change instance of base class to subclass stackoverflow.comI would like to change a concrete superclass to one of its subclass. I've included an example below: |
61. How to persist an entity from an non-entity subclass in Hibernate stackoverflow.comI am trying to extend an entity into a non-entity which is used to fill the superclass's fields. The problem is that when I try to save it Hibernate throws a ... |
62. Hibernate : scroll on subclasses of a given class stackoverflow.comIs it possible through Hibernate to perform a scroll on subclasses of a given class which doesn't have an hibernate mapping ? My classes are like : Publication - Blog - Question ... |
63. JPA/Hibernate with InheritanceType.JOINED doing select on subclass stackoverflow.comI have a basic inheritance hierarchy setup using JPA and Hibernate that looks something like the following: |
64. Hibernate: table per concrete class vs. table per subclass stackoverflow.comim planing / designing my database for my current projct (java). For this project im going to use hibernate. In my project i have a base class/interface called Command. In fact the ... |
65. Table Per Subclass Vs Table Per concrete class in hibernate? stackoverflow.comIn most of the web application, i have seen one base class consisting common properties and number of subclasses extending base class . So my question here is which strategy ... |
66. Hibernate joined-subclass update stackoverflow.comI have a base class, |
67. Netbeans Hibernate Autogenerate Joined Subclasses forums.netbeans.orgHello Everyone , I am starting into the world of hibernate. I am using the autogenerate pojos from database mappings but am not getting what I want. When the generator runs ... |
68. Hibernate - Using subclass and joined-subclass element coderanch.comHi, Im having a problem with using |
69. Hibernate: Simpler query with many subclasses coderanch.comWe have object relationship that basically a common entity as the parent with many child classes which specialize with different attribute. We map those relationship using joined-subclass so parent and each children have their own table. And there are cases where we would like to query just information that is available in parent table only. How can we do that? Currently ... |
70. Hibernate: subclass with foreign key as discriminator coderanch.comG'day to all! I'm currently trying to implement some kind different kind of Lookup Values in one Table. So for instance a Currency, Country, Cities etc, etc all in one table. Looking something like this: id, code, description, type_id where type is an id pointing to a meta lookupvalue expressing the type like Currency, Country, City etc. I want to implement ... |
71. hibernate HibernateTemplate.get() returns incorrect subclass instance coderanch.comHi all, I've just run into an unexpected problem with hibernate: i make a HibernateTemplate.get(myClass.class, id) call to get back an instance of my object. While testing for incorrect results, i tried the id of a sibling subclass...and it returned an object of the incorrect type! This is most strange to me. Hopefully it is just a problem with my hibernate ... |
72. special deleting (using joined-subclass in hibernate ) coderanch.com |
73. hibernate mapping to subclass coderanch.comhi guys this must be simple, but i am new to this filed. This is my xml file in hibernate |
74. JPA / JPQL : Order by Subclass coderanch.comHi, i have a question regarding JPA and "Order By". I have the following class hierarchy: - BaseAccount | |-> CustomerAccount |-> BusinessAccount The inheritance strategy is JOINED. I want to retrieve a list of BaseAccount's ordered by their subclass. E.g. first all BusinessAccounts and then all CustomerAccounts. Is there a way to formulate this in JPQL? This is the first ... |
75. caching the subclass in Hibernate coderanch.com |
76. Hibernate: Select only from "Parent"-table in union-subclass coderanch.comHi fellow saloonists! I have class A and Class B extends A, both are mapped using union-subclass in Hibernate. I'm using a |
77. Hibernate: How to set multiple values for |
78. Multiple subclasses, one superclass in Hibernate. coderanch.comHi, thanks for another quick reply. The scenario I've depicted is one I made up to illustrate the hypothetical situation of a non-linear inheritance. I used your example from Hibernate made easy as a base. The problem is that the book only deals with the linear case of inheritance (Ancestor <- Parent <- Child). Let's say that I have a Person-class ... |
79. Mapping Inheritance with Hibernate & Table Per Subclass coderanch.com |
80. Hibernate Table per subclass: using a discriminator coderanch.comThe argument here is: "Hibernate's implementation of table per subclass does not require a discriminator column. Other object/relational mappers use a different implementation of table per subclass that requires a type discriminator column in the superclass table. The approach taken by Hibernate is much more difficult to implement, but arguably more correct from a relational point of view." One of the ... |
81. Hibernate: multiple subclasses not using fetchmode join coderanch.comHi, I'm having weird issues trying to use fetch="join" on the properties of more than one subclass of my hibernate mapping file. First, the situation: I have a constellation of one-to-many tables related by foreign key to a single parent table. The parent table defines the superclass, then overlapping subsets of the related tables define the subclasses. So subclass A will ... |
82. JPA: Joined Table ID of subclass coderanch.comHi everyone, How do I override the column name of the ID of my subclass entity? Say the superclass Parent is mapped to table "parent" and its id is mapped to column "id", then I have this subclass called Child mapped to table "child" having its id mapped to column "id". I want my subclass Child to get its id mapped ... |
83. Hibernate subclasses java-forums.org |
84. Hibernate table-per-subclass mapping liferay.com |
86. name-enity not used in subclass mapping definition. forum.hibernate.orgDue to a bug in version 3.3.2 (and earlier version maybe), the entity-name attribute isn't used correctly in a subclass mapping. Due to this bug, Hibernate will throw an exceptions when performing a save/update actions on the "first run". It will the perform a second run to find the entity name (= class name), and if you are not using entity-name ... |
87. Using joined-subclass, and inheritance - Help - forum.hibernate.orgI am trying to write a sample app that uses the joined-subclass feature in hibernate. I am using the Empleado (Empleyed) and Contador (Counter). I can only run the method to add a counter, I can not delete, or list. I dont know what is the problem, help me please!!! Any help would be get me is very welcome. Sorry about ... |
88. Blob problem ONLY when using joined subclass forum.hibernate.orgNewbie Joined: Fri Aug 14, 2009 8:06 am Posts: 19 I have implemented a subclass ImageBlob of BlobImpl in order to store images in the db. This works perfectly if I map the class containing this blob with |
89. Table per subclass with discriminator forum.hibernate.org |
90. problem in union subclass startgey forum.hibernate.org |
91. mapping subclass w/ discriminator, join table & one-to-one forum.hibernate.orgthe following mapping is wrong because inside |
92. Relationship Column per Subclass with Discriminator Column forum.hibernate.orgCode: @Entity @Inheritance(strategy=InheritanceType.TABLE_PER_CLASS) public abstract class TE { @Id @GenericGenerator(name = "idGenerator", strategy = "assigned") @GeneratedValue(generator = "idGenerator") @Column(name="TE_KEY") private String id; @OneToMany @JoinColumn(name="TA_KEY", referencedColumnName="TE_KEY", insertable=false, updatable=false) private List |
93. joined subclass issues forum.hibernate.org |
94. Inheritance with more than one subclasses forum.hibernate.org |
95. Union subclass mapping. forum.hibernate.orgHi, everyone. I've got a problem with Hibernate union-subclass mapping. Sorry, I've changed table and entity names but the whole meaning is the same. The problem is that the properties of particular union subclass are not being resolved at all. I get nulls when I try to get vendorConfirmationNum from some.entity.ChildEntityTwo, though I've executed queries from hibernate SQL logs for this ... |
96. how to persist an object of a subclass from an existing supe forum.hibernate.orgNewbie Joined: Tue Feb 09, 2010 7:32 am Posts: 1 Hello, I have a user entity which inherits from collaborator entity, and i use @Inheritance(strategy = InheritanceType.JOINED) in the Collaborator entity. I do not find the way to persist a user entity that belongs to an existing collaborator, I can add a user object and it results to 2 new created ... |
97. Inconsistent behaviour when fetching cached subclass entitie forum.hibernate.orgHi all, Enabling the hibernate second-level cache is leading to inconsistent behaviour when fetching cached subclass entities as opposed to fetching non-cached subclass entities. Consider a simple scenario having a parent entity: Code: @Entity @Table(name = "tt_test") @Inheritance(strategy = InheritanceType.SINGLE_TABLE) public abstract class ParentEntity implements Serializable { private static final long serialVersionUID = ... |
98. Unique index and foreign keys with union-subclass forum.hibernate.orgGiven, Abstract ClassA. - id property - property-1 - property-2 - many-to-one to ClassX ClassB extends ClassA - id property - property-3 ClassC extends ClassA - id property - property-4 ClassX -id property -property-5 Above situation is mapped using three hibernate hbm xml files: - one for abstract ClassA, mapped with attribute abstract="true". - one for concrete ClassB, mapped with union-subclass ... |
99. Subclass one-to-one - Unknown column issue forum.hibernate.orgHi Team, Below are my pojos Code: class SuperA{} abstract class SubA extends SuperA{} class SubB extends SubA{ SubC subC; } class SubC extends SubA{ SubB subB; } And below are my mapping files Code: |
100. Unknown column on subclass object forum.hibernate.orgHi, I am trying to fetch an object of a subclass. But it throws Unknown column error, even though the particular column is available in the subclass table. If i add the same in the super class table it is not throwing the error. But it won't work properly. Please help me resolve this. Let me know, If you want to ... |