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Explore Stack InternalI just got this error because I was settingassigning an un-proxied entity don'tonto another entity before saving.
I should have been linking a proxied entity instance.
See the below explanation:
Child saved = childRepository.save(child); // INCORRECT parent.setChild(child); // <-- 'child' is NOT managed (not proxied) // CORRECT parent.setChild(saved); // <-- 'saved' is managed (proxied) I just got this error because I was setting an un-proxied entity don't another entity before saving.
I should have been linking a proxied entity instance.
See the below explanation:
Child saved = childRepository.save(child); // INCORRECT parent.setChild(child); // <-- 'child' is NOT managed (not proxied) // CORRECT parent.setChild(saved); // <-- 'saved' is managed (proxied) I just got this error because I was assigning an un-proxied entity onto another entity before saving.
I should have been linking a proxied entity instance.
See the below explanation:
Child saved = childRepository.save(child); // INCORRECT parent.setChild(child); // <-- 'child' is NOT managed (not proxied) // CORRECT parent.setChild(saved); // <-- 'saved' is managed (proxied) I just got this error because I was setting an un-managed, un-proxied beanentity don't another entity before saving.
I should have been linking a proxied entity instance.
See the below explanation:
Child saved = childRepository.save(child); // INCORRECT parent.setChild(child); // <-- 'child' is NOT managed (not proxied) // CORRECT parent.setChild(saved); // <-- 'saved' is managed (proxied) I just got this error because I was setting an un-managed, un-proxied bean.
I should have been linking a proxied entity instance.
See the below explanation:
Child saved = childRepository.save(child); // INCORRECT parent.setChild(child); // <-- 'child' is NOT managed (not proxied) // CORRECT parent.setChild(saved); // <-- 'saved' is managed (proxied) I just got this error because I was setting an un-proxied entity don't another entity before saving.
I should have been linking a proxied entity instance.
See the below explanation:
Child saved = childRepository.save(child); // INCORRECT parent.setChild(child); // <-- 'child' is NOT managed (not proxied) // CORRECT parent.setChild(saved); // <-- 'saved' is managed (proxied) I just got this error where two entities referenced each other via a @OneToOne mappingbecause I was setting an un-managed, un-proxied bean.
Using the @transient instructs the ORM not to persist that propertyI should have been linking a proxied entity instance.
NOTE that inSee the below example the child is the one with the foreign key to the parent.explanation:
public class Child { saved = @OneToOnechildRepository.save(child); private Parent parent; // INCORRECT parent.setChild(child); // <-- ORM'child' shouldis persistNOT asmanaged usual }(not proxied) public class Parent// {CORRECT @OneToOneparent.setChild(mappedBy = "parent"saved) @Transient ; // <-- ORM should NOT to persist 'saved' privateis Childmanaged child; }(proxied) I just got this error where two entities referenced each other via a @OneToOne mapping.
Using the @transient instructs the ORM not to persist that property.
NOTE that in the below example the child is the one with the foreign key to the parent.
public class Child { @OneToOne() private Parent parent; // <-- ORM should persist as usual } public class Parent { @OneToOne(mappedBy = "parent") @Transient // <-- ORM should NOT to persist private Child child; } I just got this error because I was setting an un-managed, un-proxied bean.
I should have been linking a proxied entity instance.
See the below explanation:
Child saved = childRepository.save(child); // INCORRECT parent.setChild(child); // <-- 'child' is NOT managed (not proxied) // CORRECT parent.setChild(saved); // <-- 'saved' is managed (proxied)