appendJson("id", entity.getId(), buf).append(',');
                    appendJson("query-id", entity.getQueryId(), buf).append(',');
                    appendJson("user-info-id", entity.getUserInfoId(), buf).append(',');
                    appendJson("user-session-id", entity.getUserSessionId(), buf).append(',');
                    appendJson("user", entity.getUser(), buf).append(',');

                params.put("ID", e.getId());
                params.put("Query ID", e.getQueryId());
                params.put("Doc ID", e.getDocId());
                params.put("User Info ID", e.getUserInfoId());
                params.put("URL", e.getUrl());
                params.put("Created Time", FessFunctions.formatDate(e.getCreatedAt()));

        setupEpg(_epgMap, et -> ((SearchLog) et).getUserAgent(), (et, vl) -> ((SearchLog) et).setUserAgent(DfTypeUtil.toString(vl)),
                "userAgent");
        setupEpg(_epgMap, et -> ((SearchLog) et).getUserInfoId(), (et, vl) -> ((SearchLog) et).setUserInfoId(DfTypeUtil.toString(vl)),
                "userInfoId");

        return convertEmptyToNull(userAgent);
    }

    public void setUserAgent(String value) {
        registerModifiedProperty("userAgent");
        this.userAgent = value;
    }

    public String getUserInfoId() {
        checkSpecifiedProperty("userInfoId");
        return convertEmptyToNull(userInfoId);
    }

    public void setUserInfoId(String value) {
        registerModifiedProperty("userInfoId");