我想在CriteriaQuery中实现以下where语句。
(Event.time >= NOW()
OR (Event.time >= '$clubHours' && (`EventSelectType`.`type`='cafe' || `EventSelectType`.`type`='DJ'))
OR (Event.endtime >= NOW() && (`EventSelectType`.`type`='festival' OR `EventSelectType`.`type`='dj' OR `EventSelectType`.`type`='cafe')))
我尝试了以下内容;
eQr.where(
cB.or(
cB.or(
cB.greaterThanOrEqualTo(eventRoot.<Date>get("time"), curDate)
),
cB.or(
cB.and(
cB.greaterThanOrEqualTo(eventRoot.<Date>get("time"), cal.getTime())
),
cB.or(
cB.equal(eventType.<String>get("type"), "cafe"),
cB.equal(eventType.<String>get("type"), "DJ")
)
),
cB.or(
cB.and(
cB.greaterThanOrEqualTo(eventRoot.<Date>get("endtime"), curDate)
),
cB.or(
cB.equal(eventType.<String>get("type"), "festival"),
cB.equal(eventType.<String>get("type"), "DJ"),
cB.equal(eventType.<String>get("type"), "cafe")
)
)
),
cB.equal(eventRoot.<Integer>get("id"), eventID),
cB.equal(eventRoot.<Integer>get("active"), 1)
);
但所有这些都是一个很大的OR语句
(event0_.time>=? or event0_.time>=? or eventselec13_.type=? or eventselec13_.type=? or event0_.endtime>=? or eventselec13_.type=? or eventselec13_.type=? or eventselec13_.type=?)
我怎样才能得到我正在寻找的结果?
修改
我目前有这个
Predicate eventTypeIscafeORDJ = cB.or(
cB.equal(eventType.<String>get("type"), "cafe"),
cB.equal(eventType.<String>get("type"), "DJ")
);
Predicate eventTypeIsFestivalDJORCafe = cB.or(
cB.equal(eventType.<String>get("type"), "cafe"),
cB.equal(eventType.<String>get("type"), "DJ"),
cB.equal(eventType.<String>get("type"), "festival")
);
Predicate timeGreaterOrEqualTo = cB.greaterThanOrEqualTo(eventRoot.<Date>get("time"), cal.getTime());
Predicate endTimeGreaterOrEqualTo = cB.greaterThanOrEqualTo(eventRoot.<Date>get("endtime"), curDate);
Predicate equalToId = cB.equal(eventRoot.<Integer>get("id"), eventID);
eQr.where(timeGreaterOrEqualTo, cB.or( cB.and( timeGreaterOrEqualTo, eventTypeIscafeORDJ ), cB.and(endTimeGreaterOrEqualTo, eventTypeIsFestivalDJORCafe )), equalToId);
哪个输出
where event0_.time>=? and (event0_.time>=? and (eventselec13_.type=? or eventselec13_.type=?) or event0_.endtime>=? and (eventselec13_.type=? or eventselec13_.type=? or eventselec13_.type=?)) and event0_.id=633188
但必须是
where (event0_.time>=? OR (event0_.time>=? and (eventselec13_.type=? or eventselec13_.type=?)) or (event0_.endtime>=? and (eventselec13_.type=? or eventselec13_.type=? or eventselec13_.type=?))) and event0_.id=633188
它仍然不是我想要的东西,我似乎无法按照我想要的方式工作。
答案 0 :(得分:1)
从明显的第一个问题开始:
var waitElementFound = function (value) {
var EC = protractor.ExpectedConditions;
browser.wait(EC.visibilityOf(value), 35000);
};
module.exports = new waitElementFound(); //export the function
这应该构造为
Event.time >= '$clubHours' && (`EventSelectType`.`type`='cafe' || `EventSelectType`.`type`='DJ'))
相反,你有:
cB.and(
cB.greaterThanOrEqualTo(eventRoot.<Date>get("time"), cal.getTime()),
cB.or(
cB.equal(eventType.<String>get("type"), "cafe"),
cB.equal(eventType.<String>get("type"), "DJ")
)
), ...
因此,基本上,您需要确保查看括号而不是缩进,以便了解代码的作用。作为旁注,您最好逐步构造此谓词,以便您的代码更易于阅读和理解。 E.g:
cB.and(
cB.greaterThanOrEqualTo(eventRoot.<Date>get("time"), cal.getTime())
),
cB.or(
cB.equal(eventType.<String>get("type"), "cafe"),
cB.equal(eventType.<String>get("type"), "DJ")
)
数据库几乎总是代码的较慢部分,优化器可能会生成相同的运行时或任何一组代码,因此您应该让自己和其他人更容易。此外,这是调试编码问题的经过时间考验的方式,特别是当你看到所有这些问题时。