将jooq的获取/结果映射到特定的Record

Question

当我当前使用Jooq查询时,我明确地将每个记录对象转换为预期的记录类型.

Result<Record> result = sql.select().from(Tables.COUNTRY).fetch();
for (Record r : result) {
    CountryRecord countryRecord = (CountryRecord) r;
    //Extract data from countryRecord
    countryRecord.getId();
}

与Jooq一起,是否可能将结果直接转换为所需的记录类型？

如(这不编译):

Result<CountryRecord> countryRecords = (Result<CountryRecord>) sql.select().from(Tables.COUNTRY).fetch();
for (CountryRecord cr : countryRecords) {
    cr.getNamet();
    //etc...
}

Answer 1

@Lukas,

实际上我们正在使用fetchInto()将结果转换为对象列表.

例如:

Employee pojo匹配数据库表是员工.

List<Employee> employeeList = sql.select(Tables.Employee)
                                 .from(Tables.EMPLOYEE).fetchInto(Employee.class);

同样,我们如何转换我们使用连接获取的记录？

例如:

Customerpojo匹配数据库表是customer.

Employeepojo匹配数据库表是employee.

sql.select(<<IWantAllFields>>).from(Tables.CUSTOMER)
                              .join(Tables.EMPLOYEE)
                              .on(Tables.EMPLOYEE.ID.equal(Tables.CUSTOMER.EMPLOYEE_ID))
                              .fetchInto(?);

Answer 2

如果select().from(...)要获取生成的记录类型,则不应使用语法.请selectFrom()改用.这在此处记录:

http://www.jooq.org/doc/3.1/manual/sql-execution/fetching/record-vs-tablerecord

所以你的查询应该是:

Result<CountryRecord> countryRecords = sql.selectFrom(Tables.COUNTRY).fetch();
for (CountryRecord cr : countryRecords) {
    cr.getNamet();
    //etc...
}