<function-class>org.codelibs.fess.taglib.FessFunctions</function-class>
    <function-signature>java.lang.String formatFileSize(long)</function-signature>
    <example>
      ${fe:formatFileSize(doc.content_length)}
    </example>
  </function>

  <function>
    <description>
      Returns formatted number from a given value.
    </description>
    <name>formatNumber</name>

                                    <label for="doc.content_length" class="col-sm-3 text-sm-right col-form-label">content_length</label>
                                    <div class="col-sm-9">
                                        <la:errors property="doc.content_length"/>
                                        <la:text styleId="doc.content_length"
                                                 property="doc.content_length"

						<la:option value="created.desc">
							<la:message key="labels.search_result_sort_created_desc" />
						</la:option>
						<la:option value="content_length.asc">
							<la:message key="labels.search_result_sort_content_length_asc" />
						</la:option>
						<la:option value="content_length.desc">
							<la:message key="labels.search_result_sort_content_length_desc" />
						</la:option>
						<la:option value="last_modified.asc">

        "index": false
      },
      "content_minhash_bits": {
        "type": "minhash",
        "bit_string": true,
        "minhash_analyzer": "minhash_analyzer"
      },
      "content_length": {
        "type": "long"
      },
      "created": {
        "type": "date",
        "format": "date_optional_time"
      },
      "timestamp": {
        "type": "date",

      },
      "content_minhash": {
        "type": "keyword",
        "index": false
      },
      "content_minhash_bits": {
        "type": "keyword",
        "index": false
      },
      "content_length": {
        "type": "long"
      },
      "created": {
        "type": "date",
        "format": "date_optional_time"
      },
      "timestamp": {
        "type": "date",

                    return "host";
                case FessConfig.INDEX_FIELD_SITE:
                    return "site";
                case FessConfig.INDEX_FIELD_content_length:
                    return "content_length";
                case FessConfig.INDEX_FIELD_FILETYPE:
                    return "filetype";
                case FessConfig.INDEX_FIELD_FILENAME:
                    return "filename";

						<la:option value="created.desc">
							<la:message key="labels.search_result_sort_created_desc" />
						</la:option>
						<la:option value="content_length.asc">
							<la:message key="labels.search_result_sort_content_length_asc" />
						</la:option>
						<la:option value="content_length.desc">
							<la:message key="labels.search_result_sort_content_length_desc" />
						</la:option>
						<la:option value="last_modified.asc">

            public String getIndexFieldBoost() {
                return "boost";
            }

            @Override
            public String getIndexFieldContentLength() {
                return "content_length";
            }

            @Override
            public String getIndexFieldHost() {
                return "host";
            }

            @Override
            public String getIndexFieldSite() {

            public String getIndexFieldBoost() {
                return "boost";
            }

            @Override
            public String getIndexFieldContentLength() {
                return "content_length";
            }

            @Override
            public String getIndexFieldHost() {
                return "host";
            }

            @Override

        }
    }

    @Test
    public void searchTestWithSort() throws Exception {
        String sortField = "content_length";
        Map<String, String> params = new HashMap<>();
        params.put("q", "*");
        params.put("sort", sortField + ".asc");
        params.put("num", "100");