relationship « Schema « JPA Q&A

1. Hibernate: Specifying columns in a one-to-many relationship

I'm trying to build a Hibernate layer for a database schema I have essentially no control over. Simplified, there are two tables. Table parent has two important columns:

  • parent_id, integer, primary key, ...

2. Entity classes from Database: detect relation direction from schema

I am trying to generate "Entity classes from Database" using the wizard (Netbeans 6.9.1). But it seems it cannot recognize relation directions, e.g: Scenario:

  • Table Exam has a unique field ExamName
  • Table Question ...

3. Inheritance Relationships with a Legacy Schema

4. Bidirectional relationship without bidirectional schema?

Need help with Hibernate? Read this first: ... AskForHelp Hi, I have a problem with a bidirectional many-to-one relationship between address and contact entities as mapped below. Basically a contact is mapped one-to-one with address. The contact table DDL looks like this: # Host: localhost # Database: lettings # Table: 'contact' # CREATE TABLE `contact` ( `id` int(11) NOT NULL ...