mongodb 向嵌套的student数组中添加新字段age都等于10

mongodb 向嵌套的student数组中添加新字段age都等于10

现有班级表这样
{
_id: 1,
class："class1"
student: [
{ name: "a"},
{ name: "b"},
{ name: "c"},
]
}
想达到这个效果怎么实现
{
_id: 1,
class："class1"
student: [
{ name: "a",
age: 10},
{ name: "b",
age: 10},
{ name: "c",
age: 10},
]
}

在添加到mongodb之前就添加age