java - Why hibernate delete relationship after parent refresh? -

@table(name = "parent") @entity public class parent implements serializable {     @onetoone(cascade = cascadetype.all, mappedby = "parent")     private child child; }    @table(name = "child") @entity public class child implements serializable {     private parent parent; } 

next use org.springframework.orm.hibernate3.hibernatetemplate find parent collection criteria works, when call:

list<parent> parents = hibernatetemplate.findbycriteria(...) (parent p: parents) {     //here p.getchild() return child object     hibernatetempalte.refresh(parent);     //here p.getchild() null  } 

so question why getchild() became nul after parent refresh? note null persisted database andonetoone relationship became broken.

hibernate version 3.6.9