Question

我有3张桌子

function visibleHide(){

    $('.hideme').each(function(){
        var windowOneViewHeight = $(window).height() / 100;
        var top_of_object = $(this).offset().top + ( (windowOneViewHeight * 10)); // no also add the item height, only the offset top is needed
        var bottom_of_object = $(this).offset().top + ($(this).outerHeight() - (windowOneViewHeight * 10));
        var top_of_window = $(window).scrollTop();
        var bottom_of_window = $(window).scrollTop() + $(window).height();  



        if(bottom_of_object < top_of_window) {

            $(this).css({'opacity':'0','top':'-80px'});
        }
        else if (top_of_object > bottom_of_window){
            $(this).css({'opacity':'0','top':'80px'});
        }   
        else if(bottom_of_object > top_of_window && top_of_object < bottom_of_window){
            $(this).css({'opacity':'1','top':'0'});
        }
    });
}

此表有一对多连接到状态

的表2

table 1
country
countryid countryname

表2有一对多加入城市表

 table 2
 state
 stateid statename countryid

我尝试使用查询

阅读国家/地区

table 3
city
cityid cityname stateid

它给了我国家对象，但状态列表是空的？我做错了什么???

Answer 1

好的我修好了。在@oneToMany批注中使用cascade.all

并将hql更改为条件查询。

Criteria criteria = session.createCriteria(Country.class, "country");
criteria.add(Restrictions.eq("country.countryName", countryname));

三级hibernate查询加入一对多关系

1 个答案: