//通過條件查找,支持username模糊搜索并分頁
    findAdminByParamsAndPageHasFuzzy(params, pager) {
        if (params.username) {
            let pattern = new RegExp(params.username);
            params.username = {
                $regex: pattern,
                $options: 'imxs'
            };
        }
        if (params.orgname) {
            let pattern = new RegExp(params.orgname);
            params.orgname = {
                $regex: pattern,
                $options: 'imxs'
            };
        }
        if (params.adminRoles) {
            params.adminRoles = mongoose.Types.ObjectId(params.adminRoles);
        }
        AdminHandler.searchParamsClearEmptyValue(params);
        return Promise.all([
            adminModel.find(params, { password: 0 }).count().exec(),
            adminModel.find(params, { password: 0 }).sort({
                _id: -1
            }).populate("adminRoles").skip((pager.pageIndex - 1) * pager.pageSize).limit(pager.pageSize).exec()
        ])
    }

var patt1=new RegExp("e");
document.write(patt1.exec("The best things in life are free"));

var patt1=new RegExp("e");
document.write(patt1.test("The best things in life are free"));
patt1.compile("d");
document.write(patt1.test("The best things in life are free"));