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

                    return "_primary_term";
                case FessConfig.INDEX_FIELD_LANG:
                    return "lang";
                case FessConfig.INDEX_FIELD_has_cache:
                    return "has_cache";
                case FessConfig.INDEX_FIELD_last_modified:
                    return "last_modified";
                case FessConfig.INDEX_FIELD_ANCHOR:
                    return "anchor";

            public String getIndexFieldLang() {
                return "lang";
            }

            @Override
            public String getIndexFieldHasCache() {
                return "has_cache";
            }

            @Override
            public String getIndexFieldCache() {
                return "cache";
            }

            @Override

            public String getIndexFieldLang() {
                return "lang";
            }

            @Override
            public String getIndexFieldHasCache() {
                return "has_cache";
            }

            @Override
            public String getQueryAdditionalDefaultFields() {
                return "";
            }

            @Override

            public String getIndexFieldLang() {
                return "lang";
            }

            @Override
            public String getIndexFieldHasCache() {
                return "has_cache";
            }

            @Override
            public String getQueryDefaultLanguages() {
                return "en,ja";
            }

            @Override

            public String getIndexFieldLang() {
                return "lang";
            }

            @Override
            public String getIndexFieldHasCache() {
                return "has_cache";
            }

            @Override
            public String getIndexFieldCache() {
                return "cache";
            }

            @Override