Question

基于id我必须更新mongodb数据库中的字段。我使用的是spring-mvc，angularjs和mongodb。我正在参加我的春季班，但没有更新。我正在给一个mongodb数据样本。从那个数据我必须更新状态字段。

//mongodb

{   "_id" : ObjectId("556459bc4f3c9aac453f711d"),
    "name" : "TestTask3",
    "type" : null,
    "status" : "Pending Approval",
    "detail" : "TEst",
    "comments" : "TEst"
}

//Spring class
public void approveTask(String id){


        try {
            DBCollection collection = mongoTemplate.getCollection(RelmanUtil.MONGO_DB_COLL_TASKS);
            BasicDBObject query = new BasicDBObject("_id",id);        
            BasicDBObject update = new BasicDBObject();       
            update.put("$set", new BasicDBObject("status", "Assigned"));
            collection.update(query, update);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

Answer 1

您错过了将id作为字符串传递给mongo ObjectId check this的内容，您应该更改以下代码：

import org.bson.types.ObjectId;
public void approveTask(String id) {
  try {
    DBCollection collection = mongoTemplate.getCollection(RelmanUtil.MONGO_DB_COLL_TASKS);
    BasicDBObject query = new BasicDBObject("_id", ObjectId(id));
    //OR BasicDBObject query = new BasicDBObject("_id", new ObjectId(id));
    BasicDBObject update = new BasicDBObject();
    update.put("$set", new BasicDBObject("status", "Assigned"));
    collection.update(query, update);
  } catch(Exception e) {
    e.printStackTrace();
  }
}

将id放入ObjectId(id) or new ObjectId(id)

不基于id在mongodb数据库中更新

1 个答案: