// cache
        // digest
        // host
        // site
        // url
        // anchor
        // content_length
        // last_modified
        // id
        // virtual_host
        defaultDataMap.put(fessConfig.getIndexFieldVirtualHost(),
                stream(config.getVirtualHosts()).get(stream -> stream.filter(StringUtil::isNotBlank).collect(Collectors.toList())));

        roleTypeList.add("admin");
        dataMap.put("role", roleTypeList);
        final List<String> virtualHostList = new ArrayList<String>();
        virtualHostList.add("site1");
        dataMap.put("virtual_host", virtualHostList);

        assertEquals(
                "87e7e4a2d5e2e24147ffd8820b70877a4cee15abdd48f7702e8233f0d17d7369f6d861124f106b541e6652a3e7a94cd51a332a2500fd065de6920559458cd3de",

                return "url,title,role,boost";
            }

            @Override
            public String getIndexAdminArrayFields() {
                return "lang,role,label,anchor,virtual_host";
            }

            @Override
            public String getIndexAdminDateFields() {
                return "expires,created,timestamp,last_modified";
            }

            @Override

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

# Field name for file name in the index.
index.field.filename=filename
# Field name for thumbnail in the index.
index.field.thumbnail=thumbnail
# Field name for virtual host in the index.
index.field.virtual_host=virtual_host
# Field name for content title in the response.
response.field.content_title=content_title
# Field name for content description in the response.
response.field.content_description=content_description

            "filename", "content", "has_cache", "cache", "digest", "host", "site", "segment", "config_id", "parent_id", "content_length",
            "favorite_count", "click_count", "created", "timestamp", "last_modified", "expires", "virtual_host", "doc_id");

    // ===================================================================================
    // Attribute
    // =========

    /** Client for interacting with the search engine. */
    @Resource

                                    <tr>
                                        <th><la:message
                                                key="labels.virtual_host"/></th>
                                        <td>${f:h(virtualHost)}<la:hidden property="virtualHost"/></td>
                                    </tr>
                                    </tbody>
                                </table>
                            </div>

                                    <label for="virtualHost" class="col-sm-3 text-sm-right col-form-label"><la:message
                                            key="labels.virtual_host"/></label>
                                    <div class="col-sm-9">
                                        <la:errors property="virtualHost"/>
                                        <la:text styleId="virtualHost" property="virtualHost"

                                    <tr>
                                        <th><la:message
                                                key="labels.virtual_host"/></th>
                                        <td>${f:h(virtualHost)}<la:hidden property="virtualHost"/></td>
                                    </tr>
                                    </tbody>
                                </table>
                            </div>

                                    <label for="virtualHost" class="col-sm-3 text-sm-right col-form-label"><la:message
                                            key="labels.virtual_host"/></label>
                                    <div class="col-sm-9">
                                        <la:errors property="virtualHost"/>
                                        <la:text styleId="virtualHost" property="virtualHost"