Java Spring roo Hibernate更新条目多对多映射
我在SpringRoo中创建了两个实体Person和car之间的多对多映射,正如预期的那样,我看到了一个新的表Person\uCar。下面是Person.java中的代码Java Spring roo Hibernate更新条目多对多映射,java,hibernate,spring,spring-mvc,spring-roo,Java,Hibernate,Spring,Spring Mvc,Spring Roo,我在SpringRoo中创建了两个实体Person和car之间的多对多映射,正如预期的那样,我看到了一个新的表Person\uCar。下面是Person.java中的代码 @ManyToMany(cascade = CascadeType.ALL, mappedBy = "persons") private Set<Car> cars= new HashSet<Car>(); 我看到person表中反映的变化。我做错了什么?谢谢尝试将@Transactional(rol
@ManyToMany(cascade = CascadeType.ALL, mappedBy = "persons")
private Set<Car> cars= new HashSet<Car>();
我看到person表中反映的变化。我做错了什么?谢谢尝试将
@Transactional(rollback=false)
添加到控制器方法中
rollback=false
是默认值,因此您可以跳过它,只剩下@Transactional
。尝试将@Transactional(rollback=false)
添加到控制器方法中
rollback=false
是默认值,因此您可以跳过它,只剩下@Transactional
@RequestMapping(value ="/saveCars", method = RequestMethod.POST)
@ResponseBody
public String saveCars(@RequestParam("personId")Long personId, @RequestParam("cars") String incomingCars){
Map<String, Object> response = new HashMap<String, Object>();
try{
...
Person person = Person.findPerson(personId);
Set<Car> cars = person.getCars();
for(int i=0 ; i<temp.length ; i++){
carID = Long.parseLong(temp[i]);
cars.add(Car.findCar(carID));
}
person.setCars(cars);
person.merge();
}
LOG.debug("cars successfully added to questionnaire");
response.put("message", "success");
}
return new JSONSerializer().exclude("*.class").deepSerialize(response);
}
Person person = Person.findPerson(personId);
person.setName("Jonathan");
person.merge();