ELASTICSEARCH-带反斜杠的Filter_path查询

Question

我试图通过filter_path获取带有反斜杠的字段中的值，但是它什么也不返回。

GET mike/_search?filter_path=hits.hits._source.data.add.ces.info
    {
      "hits" : {
        "hits" : [
          {
            "_source" : {
              "data" : [
                {
                  "add" : [
                    {
                      "ces" : [
                        {
                          "info" : "{\"@color\": \"red\",\"state\": 
                          {\"@state\": \"open\", \"@reason\": \"null\"}}"
                        }

GET mike/_search?filter_path=hits.hits._source.data.add.ces.info.@color
{}

如何使用反斜杠访问信息并将其显示在屏幕上？