ElasticSearch issue with querying a multi-valued property

Question

I'm running into an issue in that I have a document indexed with elasticsearch and when I query against a multi-valued field, it returns no results. Here is my search:

curl -X GET "http://mncoboss13:9200/boss_model_reservations/_search?pretty=true" -d '{"query":{"match_all":{}},"filter":{"and":[{"terms":{"day_plan":["MO"]}}]},"size":100,"from":0}'

Results in:

{ "took" : 2, "timed_out" : false, "_shards" : { "total" : 5, "successful" : 5, "failed" : 0 }, "hits" : { "total" : 0, "max_score" : null, "hits" : [ ] } }

Here is the way I've indexed the document (notice that day_plan is an array of strings). Notice that even in the example below, it has a day_plan with MO within it; however, given the above search, is not returned. Am I doing something wrong with my filter?

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"]}
          } ]
        }
      }

UPDATE: The Type mapping for this index is here:

{
  "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"
        }
      }
    }
  }
}

Answer 1

What's the type mapping for "boss_model_reservation"? The term filter assumes the field "day_plan" is not analyzed.