查找包含特定值的数组的文档 [英] Find document with array that contains a specific value

问题描述

如果我有此架构...

If I have this schema...

person = {
    name : String,
    favoriteFoods : Array
}

...，其中favoriteFoods数组填充有字符串.我怎么能找到所有以猫鼬为食的人?

... where the favoriteFoods array is populated with strings. How can I find all persons that have "sushi" as their favorite food using mongoose?

我希望有以下类似的东西:

I was hoping for something along the lines of:

PersonModel.find({ favoriteFoods : { $contains : "sushi" }, function(...) {...});

(我知道mongodb中没有$contains，只是在知道解决方案之前先解释了我期望找到的内容)

(I know that there is no $contains in mongodb, just explaining what I was expecting to find before knowing the solution)

推荐答案

由于favouriteFoods是一个简单的字符串数组，因此您可以直接查询该字段:

As favouriteFoods is a simple array of strings, you can just query that field directly:

PersonModel.find({ favouriteFoods: "sushi" }, ...);

但是我也建议在您的模式中使字符串数组显式显示:

But I'd also recommend making the string array explicit in your schema:

person = {
    name : String,
    favouriteFoods : [String]
}

相关文档可在此处找到: https://docs.mongodb.com /manual/tutorial/query-arrays/

The relevant documentation can be found here: https://docs.mongodb.com/manual/tutorial/query-arrays/

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