尝试通过Spring数据在Couchbase中附加值来改变子文档。但它失败了：
//示例文档
{
"type": "account",
"events": [
{
"transactionReference": "",
"value": 100
}
]
}
目标是在事件数组中再添加一个条目。以下是正在执行操作的片段。
Event eventObj = new Event(...);
repository.getCouchbaseOperations().getCouchbaseBucket()
.mutateIn("doc_id")
.arrayPrepend("events", eventObj,false).execute();
更新 之前缺少execute（）方法。 下面是异常的堆栈跟踪
com.couchbase.client.core.CouchbaseException: FAILURE
at com.couchbase.client.java.subdoc.SubdocHelper.commonSubdocErrors(SubdocHelper.java:95)
at com.couchbase.client.java.subdoc.AsyncMutateInBuilder$12.call(AsyncMutateInBuilder.java:923)
at com.couchbase.client.java.subdoc.AsyncMutateInBuilder$12.call(AsyncMutateInBuilder.java:917)
at com.couchbase.client.java.subdoc.AsyncMutateInBuilder$17.call(AsyncMutateInBuilder.java:1010)
at com.couchbase.client.java.subdoc.AsyncMutateInBuilder$17.call(AsyncMutateInBuilder.java:1000)
at rx.internal.operators.OnSubscribeMap$MapSubscriber.onNext(OnSubscribeMap.java:69)
at rx.observers.Subscribers$5.onNext(Subscribers.java:235)
at rx.internal.operators.OnSubscribeDoOnEach$DoOnEachSubscriber.onNext(OnSubscribeDoOnEach.java:101)
at rx.internal.producers.SingleProducer.request(SingleProducer.java:65)
at rx.Subscriber.setProducer(Subscriber.java:209)
at rx.Subscriber.setProducer(Subscriber.java:205)
at rx.internal.operators.OnSubscribeMap$MapSubscriber.setProducer(OnSubscribeMap.java:102)
at rx.Subscriber.setProducer(Subscriber.java:205)
at rx.Subscriber.setProducer(Subscriber.java:205)
at rx.subjects.AsyncSubject.onCompleted(AsyncSubject.java:106)
at com.couchbase.client.core.endpoint.AbstractGenericHandler.completeResponse(AbstractGenericHandler.java:375)
at com.couchbase.client.core.endpoint.AbstractGenericHandler.access$000(AbstractGenericHandler.java:69)
at com.couchbase.client.core.endpoint.AbstractGenericHandler$1.call(AbstractGenericHandler.java:393)
at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: rx.exceptions.OnErrorThrowable$OnNextValue: OnError while emitting onNext value: com.couchbase.client.core.message.kv.subdoc.simple.SimpleSubdocResponse.class
答案 0 :(得分：0)
Couchbase Sub-Document API是一个构建器API，允许您将多个mutate命令（或多个检索命令）链接在一起。使用Java SDK，您必须调用execute()来执行这些突变。
Event eventObj = new Event(...);
repository.getCouchbaseOperations().getCouchbaseBucket()
.mutateIn("doc_id")
.arrayPrepend("events", eventObj,false)
.execute();