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希望增加对子集中数组的处理功能,目前的方法,只能对子集进行整个替换,效率太低.
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希望增加对子集中数组的处理功能,目前的方法,只能对子集进行整个替换,效率太低. 在子集数组中增加一项,用$push 2.修改子集数组的某一栏,用{$set:{arrayname.$.colname,value)} 3.替换子集数组中的某一行,用{$set:{arrayname.$,value}}, 该种情况必须保证查询条件可以查到有效的结果集,否则更新时会报错.
您好,请问最近还在使用mongodb plugin吗
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希望增加对子集中数组的处理功能,目前的方法,只能对子集进行整个替换,效率太低.
2.修改子集数组的某一栏,用{$set:{arrayname.$.colname,value)}
3.替换子集数组中的某一行,用{$set:{arrayname.$,value}}, 该种情况必须保证查询条件可以查到有效的结果集,否则更新时会报错.
The text was updated successfully, but these errors were encountered: