How to Find a Document by _id Using mongo-go-driver?

How to Find a Document by _id Using mongo-go-driver

To retrieve a document based on its auto-generated _id field, one can utilize the FindOne method provided by the mongo-go-driver library. However, a user recently encountered an issue where the provided query returned no results despite using a valid _id value obtained from Mongo Express.

The user initially attempted to create an ObjectID using bson.RawValue and employed bson.EC.ObjectID, but these proved ineffective due to the absence of both the EC type in the bson package and the objectid package in mongo-go-driver.

To resolve this, it was suggested to utilize the primitive.ObjectIDFromHex function, ensuring a straightforward and efficient ObjectID declaration. The updated code below successfully retrieved the desired document:

<code class="go">objID, _ := primitive.ObjectIDFromHex("5c7452c7aeb4c97e0cdb75bf")
value := collection.FindOne(ctx, bson.M{"_id": objID})</code>

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