java - JPA: Delete children in OneToMany -


मेरे पास नीचे OneToMany मानचित्रण है

अभिभावक: 

  @OneToMany (मैप किया गया = मूल, orphanRemoval = true, cascade = {CascadeType.ALL}) निजी सूची & lt; Child & gt; चाइल्ड = नए अर्रेलिस्ट & lt; बाल & gt; ();   
 बाल:  
  @ManyToOne @JoinColumn (नाम = "अभिभावक") निजी माता-पिता के माता-पिता;   
 माता-पिता को अद्यतन करते समय, मुझे एक अपवाद मिल रहा है:  
  cascade = "all-delete-orphan" के साथ एक संग्रह का संदर्भ नहीं मालिक इकाई उदाहरण   
 मेरा कोड:  
  parent.getChild ()। स्पष्ट (); माता-पिता.सेटबिल (बाल लिस्ट)   
 
 
 आप माता-पिता से बच्चों को निकालते हैं, लेकिन < कोड> चाइल्ड  स्वामित्व वाली पक्ष है, आपको  माता-पिता  से  बाल  संस्थाओं के संदर्भ को निकाल देना होगा।  
  के लिए (शिशु बच्चा: बच्चों) {child.setParent (नल); }

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