I have a many-to-one mapping and not null constraint on the column. i am getting the exception column is Null while saving. Can anybody please suggest how do i use cascade and inverse in this scenario?
Hibernate Many-to-One mapping with not null constraint
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Paulo Merson
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Instead of @NotNull, indicate that the association is not optional using @ManyToOne(optional = false). The @NotNull is not specific to Hibernate; it's a generic bean annotation that may be enforced prior to saving the entitites. To be safe, I suggest using @NotNull primarily for @Column attributes.
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the entity with the onetomany/collection will by default maintain the association by cascading to the child which inserts first without the backreference and then updates the id. To solve this the onetomany/collection mapping must have the inverse attribute set and the backreference in the child must be set correctly.