java - @AttribueOverride(name="col1", column=@Column(nullable=true)) 抛出无法将字段设置为空值

Question

所以我有一个包含映射到列的两个字段的可嵌入类型。在该类型中，两列都设置为nullable = false.

在另一个使用该可嵌入类型的对象中，我想覆盖列名并将其中一列设置为nullable = true.

@AttributeOverrides({ @AttributeOverride(name="col1", column=@Column(name="COL_1", nullable=true)), @AttributeOverride(name="col2", column=@Column(name="COL_2", nullable=false)) })

看起来不错，对吧？

当我运行我的代码时，我尝试获取 col1 为空的行，我得到了这个：

org.hibernate.PropertyAccessException: Null value was assigned to a property of primitive type setter col1

有任何想法吗？

提前致谢。

Answer 1

The column is nullable, but the field in your entity is a primitive type (int, long, or boolean, presumably). There's no way for Hibernate to store null into a primitive type field. It should be Integer or Long or Boolean instead.

That's what the error message says: "Null value was assigned to a property of primitive type".