ElasticSearch date detection in a dynamic template

1_description.txt

In the index below, the dynamic template is configured to set its properties' type to "string".

However, when indexing the document below, the "attribs.hasbro_product_number" property's type is "date" instead of "string". Why?

This can be seen on lines 42-45 of the last file in this gist.

---

Update: It works now!

2_setup.txt

curl -X DELETE 'localhost:9200/hasbro'
echo
curl -X PUT 'localhost:9200/hasbro'
echo
curl -X PUT 'localhost:9200/hasbro/product/_mapping' -d '{
  "product": {

    "date_detection": true,

    "dynamic_templates": [
      {
        "date_property": {
          "match_mapping_type": "date",
          "path_match"        : "*attribs.*",
          "mapping"           : {

            "type"  : "multi_field",
            "fields": {

              "{name}": {
                "type"          : "string",
                "index"         : "analyzed",
                "include_in_all": true
              },

              "orig": {
                "type"          : "string",
                "index"         : "not_analyzed",
                "include_in_all": false
              }
            }
          }
        }
      },
      {
        "string_property": {
          "match_mapping_type": "string",
          "path_match"        : "*attribs.*",
          "mapping"           : {

            "type"  : "multi_field",
            "fields": {

              "{name}": {
                "type"          : "string",
                "index"         : "analyzed",
                "include_in_all": true
              },

              "orig": {
                "type"          : "string",
                "index"         : "not_analyzed",
                "include_in_all": false
              }
            }
          }
        }
      }
    ]
  }
}'
echo
curl -X PUT 'localhost:9200/hasbro/product/4eb1dd4a349c306bd50000a2' -d '{
  "_type"  : "product",
  "id"     : "4eb1dd4a349c306bd50000a2",
  "name"   : "Iron Man",
  "attribs": { "hasbro_product_number" : "2009-001" }
}'
echo
curl -X POST 'localhost:9200/hasbro/_refresh'
echo
curl -X GET 'localhost:9200/hasbro/product/_mapping?pretty=true'
echo

3_output.txt

{"ok":true,"acknowledged":true}
{"ok":true,"acknowledged":true}
{"ok":true,"acknowledged":true}
{"ok":true,"_index":"hasbro","_type":"product","_id":"4eb1dd4a349c306bd50000a2","_version":1}
{"ok":true,"_shards":{"total":1,"successful":1,"failed":0}}
{
  "product" : {
    "dynamic_templates" : [ {
      "date_property" : {
        "mapping" : {
          "type" : "multi_field",
          "fields" : {
            "orig" : {
              "include_in_all" : false,
              "index" : "not_analyzed",
              "type" : "string"
            },
            "{name}" : {
              "include_in_all" : true,
              "index" : "analyzed",
              "type" : "string"
            }
          }
        },
        "match_mapping_type" : "date",
        "path_match" : "*attribs.*"
      }
    }, {
      "string_property" : {
        "mapping" : {
          "type" : "multi_field",
          "fields" : {
            "orig" : {
              "include_in_all" : false,
              "index" : "not_analyzed",
              "type" : "string"
            },
            "{name}" : {
              "include_in_all" : true,
              "index" : "analyzed",
              "type" : "string"
            }
          }
        },
        "match_mapping_type" : "string",
        "path_match" : "*attribs.*"
      }
    } ],
    "properties" : {
      "id" : {
        "type" : "string"
      },
      "_type" : {
        "type" : "string"
      },
      "name" : {
        "type" : "string"
      },
      "attribs" : {
        "dynamic" : "true",
        "properties" : {
          "hasbro_product_number" : {
            "type" : "multi_field",
            "fields" : {
              "hasbro_product_number" : {
                "include_in_all" : true,
                "type" : "string"
              },
              "orig" : {
                "include_in_all" : false,
                "index" : "not_analyzed",
                "type" : "string"
              }
            }
          }
        }
      }
    }
  }
}