Question

我有一个包含元素的集合会话

{
    "_id" : NumberLong(1),
    "_class" : "cws.CWSession",
    "title" : "java ",
    "description" : "apprendre à programmer en java"  
}

{
    "_id" : NumberLong(2),
    "_class" : "cws.CWSession",
    "title" : "Git",
    "description" : "Formation Git"    
}

我有另一个包含CWRed的CWSed的集合：

{
"_id" : NumberLong(2),
"_class" : "cws.CollaborativeWs",    
"title" : "AngularJS",
"description" : "AngularJS",
"cws" : [ 
    {
        "$ref" : "cwsession",
        "$id" : NumberLong(1)
    },
    {
        "$ref" : "cwsession",
        "$id" : NumberLong(2)
    }
]
}

{
"_id" : NumberLong(3),
"_class" : "cws.CollaborativeWs",    
"title" : "Java",
"description" : "principes java ",
"cws" : [ 
    {
        "$ref" : "cwsession",
        "$id" : NumberLong(3)
    }
]
}

我使用mongo模板删除会话

mongoTemplate.remove(new Query(Criteria.where("_id").is(id)), CWSession.class);

它工作正常，会话在第一个集合中被删除但仍然在第二个集合中，你能告诉我在第二个集合中我可以用什么来删除引用？并提前感谢你。

public void deleteSessionfromCW(String idCW, String idS){
    Query query = new Query(where("_id").is(idCW).and("cws.id").is(id));
    Update update = new Update().pull("cws", new BasicDBObject("id", "1"));
    mongoTemplate.updateFirst(query, update, Item.class);
}

Answer 1

我遇到了类似的问题，在找到答案之前遇到了未解答的问题。我会根据我为未来Google员工Other Question

找到的答案发布解决方案

mongoTemplate.remove(new Query(Criteria.where("id").is(id)), CWSession.class);
mongoTemplate.remove(new Query(Criteria.where("cws.$id").is(new ObjectId(id)), CollaborativeWs.class);

从另一个集合中删除dbref元素

1 个答案: