使用包含特定值的数组查找文档

问题描述

如果我有这个架构...

If I have this schema...

person = {
    name : String,
    favoriteFoods : Array
}

... 其中 favoriteFoods 数组用字符串填充.如何使用猫鼬找到所有将寿司"作为他们最喜欢的食物的人?

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

我希望得到以下内容:

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

(我知道mongodb中没有$contains，只是解释了我在知道解决方案之前期望找到的)

(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，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" }, ...); // favouriteFoods contains "sushi"

但我也建议在您的架构中明确字符串数组:

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

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

相关文档可以在这里找到: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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