pymongo / mongodb：查询mongodb对象数组中的元素是否

Question

If I would like to query if a field in an array I can do this 如果我想查询数组中的字段是否可以执行此操作

students.find({'name':{$in:['Mark','Jerry']}})

But what if I would like to find a string is in a array of an mongodb object like 但是，如果我想找到一个字符串，该字符串位于mongodb对象的数组中，例如

{
  "name":"Jerry",
  "classes":["math","english","nature"]
}

How do I query if a class name "science" in classes array of this mongodb object? 如何查询此mongodb对象的classes数组中的类名称“ science”？

Thanks 谢谢

Answer 1

只是：

db.students.find({'classes': 'science'})