elastic search dynamic mapping issue

1.load._template.generic_template

{
  "template": "*",
  "settings": {
    "number_of_shards": 2,
    "number_of_replicas": 1,
    "search": {
      "slowlog": {
        "level": "trace",
        "threshold": {
          "query": {
            "warn": "10s",
            "info": "5s",
            "debug": "2s",
            "trace": "500ms"
          },
          "fetch": {
            "warn": "1s",
            "info": "800ms",
            "debug": "500ms",
            "trace": "200ms"
          }
        }
      }
    },
    "analysis": {
      "analyzer": {
        "defaultAnalyzerForStringSorting": {
          "type": "custom",
          "char_filter": "html_strip",
          "tokenizer": "keyword",
          "filter": [
            "icu_normalizer"
          ]
        },
        "defaultAnalyzerForStringSearching": {
          "type": "custom",
          "char_filter": "html_strip",
          "tokenizer": "uax_url_email",
          "filter": [
            "icu_normalizer"
          ]
        }
      }
    }
  },
  "mappings": {
    "catchAll": {
      "_all": {
        "enabled": false
      },
      "_source": {
        "enabled": false
      },
      "numeric_detection": true,
      "date_detection": true,
      "dynamic_templates": [
        {
          "stringMappingTemplate": {
            "match": "*",
            "match_mapping_type": "string",
            "mapping": {
              "type": "string",
              "store": "yes",
              "index": "analyzed",
              "analyzer": "defaultAnalyzerForStringSearching"
            }
          }
        }
      ]
    }
  }
}

2.create.index.test

{}

3.add.initial.document.test.catchAll

{
  "strField1": "hello this is my first string field. I hope you enjoy it"
}

4.view resulting document

{
 _index: test
 _type: catchAll
 _id: TOMAxqmtQzGZIuO-qDu5VA
 _version: 1
 _score: 1
}

5.view resulting properties of the new index

properties: {
	strField1: {
		store: yes
		,analyzer: defaultAnalyzerForStringSearching
		,type: string
	}
}