ElasticSearch问题，查询多值属性

我遇到了一个问题，因为我有一个使用elasticsearch索引的文档，当我查询多值字段时，它不返回任何结果 . 这是我的搜索：

curl -X GET“http：// mncoboss13：9200 / boss_model_reservations / _search？pretty = true”-d'{“query”：{“match_all”：{}}，“filter”：{“和”：[{ “术语”：{ “day_plan”：[ “MO”]}}]}， “大小”：100 “从”：0}”

结果是：

{“take”：2，“timed_out”：false，“_ shards”：{“total”：5，“success”：5，“failed”：0}，“hits”：{“total”：0，“ max_score“：null，”点击“：[]}}

这是我索引文档的方式（注意day_plan是一个字符串数组） . 请注意，即使在下面的示例中，它也有一个带有MO的day_plan;但是，鉴于上述搜索，不予退还 . 我的过滤器出了问题吗？

http：// mncoboss13：9200 / boss_model_reservations / _search？pretty = true＆q = *＆size = 1

{
        "took" : 2,
        "timed_out" : false,
        "_shards" : {
          "total" : 5,
          "successful" : 5,
          "failed" : 0
        },
        "hits" : {
          "total" : 27493,
          "max_score" : 1.0,
          "hits" : [ {
            "_index" : "boss_model_reservations",
            "_type" : "boss_model_reservation",
            "_id" : "779588",
            "_score" : 1.0, "_source" : {"name":"","upccode":"701592001542","publish":true,"reservation_type":"class","time_start":37200.0,"time_end":39000.0,"date_start":"2012-07-19","date_end":"2012-07-30","day_plan":["MO","TU","WE","TH"]}
          } ]
        }
      }

更新：此索引的类型映射在此处：

{
  "boss_model_reservations" : {
    "boss_model_reservation" : {
      "properties" : {
        "date_end" : {
          "type" : "date",
          "format" : "dateOptionalTime"
        },
        "date_start" : {
          "type" : "date",
          "format" : "dateOptionalTime"
        },
        "day_plan" : {
          "type" : "string"
        },
        "format_id" : {
          "type" : "long"
        },
        "interest_id" : {
          "type" : "long"
        },
        "name" : {
          "type" : "string"
        },
        "option1" : {
          "type" : "string"
        },
        "option2" : {
          "type" : "string"
        },
        "option3" : {
          "type" : "string"
        },
        "product_line_id" : {
          "type" : "long"
        },
        "product_type" : {
          "type" : "string"
        },
        "publish" : {
          "type" : "boolean"
        },
        "reservation_type" : {
          "type" : "string"
        },
        "resource" : {
          "type" : "string"
        },
        "resource_type" : {
          "type" : "string"
        },
        "time_end" : {
          "type" : "double"
        },
        "time_start" : {
          "type" : "double"
        },
        "upccode" : {
          "type" : "string"
        }
      }
    }
  }
}