CODEWITHSUNDEEP
javahibernate
Gnani
Gnani

Reputation: 149

Hibernate delete from onetomany

I have two tables with OneToMany relation

class ServiceProvider {

...

@OneToMany(fetch=FetchType.EAGER,mappedBy="serviceProvider", cascade={CascadeType.ALL,CascadeType.REMOVE},orphanRemoval = true) @OnDelete(action=OnDeleteAction.CASCADE) private List serviceCenters; ...

}

class ServiceCenterDetails {

... //bi-directional many-to-one association to ServiceProviderDomainMap @ManyToOne @JoinColumn(name="SERVICE_PROVIDER_ID") private ServiceProvider serviceProvider;

...

}

I am trying to delete provide row. But i am getting below error:

Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Cannot delete or update a parent row: a foreign key constraint fails (fixoline.service_center_details, CONSTRAINT FK_qvahoxeovx9vmwl6mcu2c0lyw FOREIGN KEY (SERVICE_PROVIDER_ID) REFERENCES service_provider (ID))

below is the way i am trying

  String hql = "DELETE FROM ServiceProvider WHERE id =  :providerId";
  Query query = sessionFactory.getCurrentSession().createQuery(hql);
          query.setParameter("providerId",providerId);

  int result = query.executeUpdate();

could someone pls help resolving it?

Upvotes: 8

Views: 2161

Answers (3)

TanvirChowdhury
TanvirChowdhury

Reputation: 2445

Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Cannot delete or update a parent row: a foreign key constraint fails

this exception tells that you should delete your ServiceCenterDetails associated with ServiceProviders first and then delete the ServiceProviders.

Upvotes: 0

Kishor
Kishor

Reputation: 41

There are two tings,

  1. Why you are using @OnDelete when you using CascadeType.ALL in @oneToMany? CascadeType.ALL will delete child entities when parent is deleted.

  2. @OnDelete mainly used in child entities with @ManyToOne not otherwise.

Try with any option and check.

Upvotes: 3

Dragan Bozanovic
Dragan Bozanovic

Reputation: 23552

The error message is quite clear: There are foreign key references to the ServiceProviders you are trying to delete. Delete ServiceCenterDetails first:

delete from ServiceCenterDetails where serviceProvider.id = :providerId

Upvotes: 0

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