mongo-go-driver通过_id查找文档

Question

I'm trying to find a document by its auto generated _id field. Code below returns nothing:

var documentID bson.RawValue
documentID.Type = 7
documentID.Value = []byte("5c7452c7aeb4c97e0cdb75bf")
objID := documentID.ObjectID()
value := collection.FindOne(ctx, bson.M{"_id": objID})

The value I provided is a real document id I got from Mongo Express

"_id": ObjectID("5c7452c7aeb4c97e0cdb75bf")

In case you're wondering why I bother with RawValue, I found examples using bson.EC.ObjectID but bson package doesn't seem to have EC type, also I found some examples mentioning github.com/mongodb/mongo-go-driver/bson/objectid package, but I could not find that package either. I previously developed with mgo but I'm new to mongo-go-driver, so if you can point an easy way to declare an ObjectID.

Answer 1

As @Carlos mentioned, I changed my code as this and everything works well.

objID, _ := primitive.ObjectIDFromHex("5c7452c7aeb4c97e0cdb75bf")
value := collection.FindOne(ctx, bson.M{"_id": objID})