I have a problem with a simple `@OneToMany` mapping between a parent and a child entity. All works well, only that child records are not deleted when I remove them from the collection.

The parent:

    @Entity
    public class Parent {
        @Id
        @Column(name = &quot;ID&quot;)
        private Long id;
    
        @OneToMany(cascade = {CascadeType.ALL}, mappedBy = &quot;parent&quot;)
        private Set&lt;Child&gt; childs = new HashSet&lt;Child&gt;();
    
     ...
    }

The child:

    @Entity
    public class Child {
        @Id
        @Column(name = &quot;ID&quot;)
        private Long id;
    
        @ManyToOne(cascade = CascadeType.ALL)
        @JoinColumn(name=&quot;PARENTID&quot;, nullable = false)
        private Parent parent;
    
      ...
    }

If I now delete and child from the childs Set, it does not get deleted from the database. I tried nullifying the `child.parent` reference, but that did not work either.

The entities are used in a web application, the delete happens as part of an Ajax request. I don&#39;t have a list of deleted childs when the save button is pressed, so I can&#39;t delete them implicitly. 



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JPA OneToMany not deleting child