if the collection test has the following document format
{
"_id" : ObjectId("123456"),
"name" : "test",
"body" : [
{
"hash" : "123123123"
}
]
}
how to create an index for the key hash at this time. The value of body is an array. So I"m a little confused
.db.test.createIndex({"body.hash": 1})Project.updateOne(r, { $pull: { thunder2: { files: { _id: "5ab362d446f15936bcea7dd3" } } } }, function(err, data) { if (err) { res.send("") } else { ...
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