我只想找到目前我所看到的那种不公开或空洞的记录;
named_scope :in_gallery, :conditions => ["gallery IS NOT NULL"]
如果用户的投入删除了标题,那么这一空洞就列入结果。
澄清 我只想选择外地有某些案文的条目......
什么
named_scope :in_gallery, :conditions => ["gallery IS NOT NULL AND gallery != "]
?
我认为,J点名的范围定义是正确的,但除了此以外,我对你为什么同时使用“民族解放军”和空洞指“并非一味”。 如果你控制了这一数据库的所有插入和更新,我就建议收集一个或一个(我觉得更自然的)数据库,并坚持这一数据库。 如果你忘记相互检查的话,它会简化你在诸如这一名词范围等地方的法典,使两者都能导致某种真正的no。
采取这种行动的一个简单办法是,增加鉴定,以打破对空洞ery的束缚,然后确定任何裂痕(你有检测)。 如果你重新提出抗反转录器,并且需要为后向兼容性提供空洞的灯塔,那么你可以先把空洞 change改到无。
下面的内容既非无效,也非空洞:
named_scope :in_gallery, :conditions => ["gallery <> "]
或者在铁路3+中,可以:
scope :in_gallery, where("gallery <> ")
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