Hibernate manytoone not updating


14-Oct-2017 19:37

We had define two model classes and Employee in our previous example.

These classes will be converted to Entity classes and we will add Annotations to it.

However some JPA providers do have support for automatically maintaining relationships.

In some cases it is undesirable to instantiate a large collection when adding a child object.

It is not normally necessary to specify the target entity explicitly since it can usually be inferred from the type of the object being referenced.

/* EMPLOYEE table */ CREATE TABLE `employee` ( `employee_id` BIGINT(10) NOT NULL AUTO_INCREMENT, `firstname` VARCHAR(50) NULL DEFAULT NULL, `lastname` VARCHAR(50) NULL DEFAULT NULL, `birth_date` DATE NOT NULL, `cell_phone` VARCHAR(15) NOT NULL, PRIMARY KEY (`employee_id`) ) COLLATE='latin1_swedish_ci' ENGINE=Inno DB ROW_FORMAT=DEFAULT AUTO_INCREMENT=216 /* EMPLOYEEDETAIL table */ CREATE TABLE `employeedetail` ( `employee_id` BIGINT(20) NOT NULL AUTO_INCREMENT, `street` VARCHAR(50) NULL DEFAULT NULL, `city` VARCHAR(50) NULL DEFAULT NULL, `state` VARCHAR(50) NULL DEFAULT NULL, `country` VARCHAR(50) NULL DEFAULT NULL, PRIMARY KEY (`employee_id`), CONSTRAINT `FKEMPL` FOREIGN KEY (`employee_id`) REFERENCES `employee` (`employee_id`) ) COLLATE='latin1_swedish_ci' ENGINE=Inno DB ROW_FORMAT=DEFAULT AUTO_INCREMENT=216 So we have created two tables “EMPLOYEE” and “EMPLOYEEDETAILS” which have One-to-one relational mapping.