UncategorizedMongoDbException：查詢失敗，錯誤代碼2和錯誤消息“未知頂級運算符：$ gte”

Question

為什么我要面對這個例外？

javax.servlet.ServletException: org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.data.mongodb.UncategorizedMongoDbException: Query failed with error code 2 and error message 'unknown top level operator: $gte' on server localhost:27017; nested exception is com.mongodb.MongoQueryException: Query failed with error code 2 and error message 'unknown top level operator: $gte' on server localhost:27017
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:146)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.eclipse.jetty.server.Server.handle(Server.java:564)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:317)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:110)
at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)
at org.eclipse.jetty.util.thread.Invocable.invokePreferred(Invocable.java:128)
at org.eclipse.jetty.util.thread.Invocable$InvocableExecutor.invoke(Invocable.java:222)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:294)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:126)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:673)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:591)
at java.lang.Thread.run(Thread.java:748)

沒有此代碼可以正常工作：

public List<Model> getByPeriod(String field, Date from, Date to) {
    return mongo.find(new Query(Criteria.where(field).gte(from)
            .and(field).lt(to)), getModelClass());
}

也失敗

//...
.where(field).gte(from).lt(to)//...

但是類似的代碼在其他情況下也可以正常工作。

Answer 1

我已經嘗試過您的代碼，它可以用於return mongo.find(new Query(Criteria.where(field).gte(from).lt(to)), getModelClass());

但不為

return mongo.find(new Query(Criteria.where(field).gte(from).and(field).lt(to)), getModelClass());

我收到的錯誤是Due to limitations of the com.mongodb.BasicDBObject, you can't add a second 'field' expression specified as 'field : { "$lt" : { "$date" : "2017-11-03T12:36:54.216Z"}}'. Criteria already contains 'field : { "$gte" : { "$date" : "2017-11-02T12:36:54.216Z"}}'. Due to limitations of the com.mongodb.BasicDBObject, you can't add a second 'field' expression specified as 'field : { "$lt" : { "$date" : "2017-11-03T12:36:54.216Z"}}'. Criteria already contains 'field : { "$gte" : { "$date" : "2017-11-02T12:36:54.216Z"}}'.

因此，結論是從查詢中刪除.and(field) 。

僅供參考：從昨天開始，到現在為止。