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📜  mongoose 查询中的 array.length - Javascript 代码示例

📅  最后修改于: 2022-03-11 15:04:15.898000             🧑  作者: Mango

代码示例1
{ “countries.1” : { “$exists” : true } }

//will do what you want. If you want $gt : 3, you would use countries.3 as array indexes starts at 0.