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View Code? Open in Web Editor NEWGO语言基础、学习笔记、项目规范
go's Issues
在go中, 如何使用mongo bson聚合筛选查询表中两个字段a>b的数据呢?
假如表中只有a和b两个int类型的字段, 如何使用聚合查询出所有a>b的数据?
这段聚合代码可以返回正确结果:
{ "$match": bson.M{ "a": bson.M{ "$gt": 100, }, }, },
这段代码返回是空的:
{ "$match": bson.M{ "a": bson.M{ "$gt": "$b", }, }, },
是我写的不对么? 还是bson不支持这种查询呢?
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