MongoDB查询中如何更新嵌套文档
> db.demo607.insertOne(
... {
... id:1,
... "Info1" : {
... "Name" : "Chris",
... "Age" : 21,
...
... "Info2" : {
... "SubjectName" : "MongoDB",
... "Marks" : 89
... }
... }
... }
... );
{
"acknowledged" : true,
"insertedId" : ObjectId("5e9742a5f57d0dc0b182d62a")
}在find()方法的帮助下显示集合中的所有文档-
> db.demo607.find();
这将产生以下输出-
{ "_id" : ObjectId("5e9742a5f57d0dc0b182d62a"), "id" : 1, "Info1" :
{ "Name" : "Chris", "Age" : 21, "Info2" : { "SubjectName" : "MongoDB", "Marks" : 89 } }
}以下是更新嵌套文档的查询-
> db.demo607.update({id:1},{$set:{"Info1.Info2.Marks":90}})
WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })在find()方法的帮助下显示集合中的所有文档-
> db.demo607.find().pretty();
这将产生以下输出-
{
"_id" : ObjectId("5e9742a5f57d0dc0b182d62a"),
"id" : 1,
"Info1" : {
"Name" : "Chris",
"Age" : 21,
"Info2" : {
"SubjectName" : "MongoDB",
"Marks" : 90
}
}
}