elasticsearch - 如何使用java在Elasticsearch中删除文档的字段属性？

Question

我在Elasticsearch中有一个文档:

  {
    "_index": "test",
    "_type": "document",
    "_id": "1",
    "_score": 1,
    "_source": {
        "class": "aaa",
        "id": 1,
        "items": [{
            "class": "aaa",
            "id": 1
        },{
            "class": "ccc",
            "id": 2
        }],
        "lastUpdated": "2016-07-22T11:26:56Z",
        "processInstance": {
            "class": "bbb"
        },
        "bianhao": "123"
    }
}

如何使用Java删除 id的 class或 items？
如何使用Java删除 {"class": "ccc","id": 2}？

我知道如何使用以下方式删除字段:

client.prepareUpdate("test", "document", "1")
        .setScript(new Script(
                "ctx._source.remove(\"bianhao\")",
                ScriptService.ScriptType.INLINE, null, null))
        .get();

items的内容是json数组，我没有找到方法。

Answer 1

您可以这样实现:

Map<String, Object> params = new HashMap<>();
params.put("classParam", "ccc");
params.put("idParam", 2);

client.prepareUpdate("test", "document", "1")
    .setScript(new Script(
            "ctx._source.items.removeAll{ it['class'] == classParam && it.id == idParam }",
            ScriptService.ScriptType.INLINE, null, params))
    .get();