From Web Development with Go by Shiju Varghese
To perform CRUD operations into MongoDB, an object of
*mgo.Collectionis created, which represents the MongoDB collection. You can create an object of*mgo.Collectionby calling methodCof*mgo.Database.The
mgo.Databasetype represents the named database that can be created by calling theDBmethod of*mgo.Session.Listing 8-5 accesses the MongoDB collection named "categories".
Listing 8-5. Accessing a MongoDB Collection
c := session.DB("taskdb").C("categories")
Do the DB and C methods create database object and collection object in Go programs both
for existing database and existing collection in a MongoDB server?
for noexisting database and nonexisting collection, so that the methods will create new database and collection in a MongoDB server, which will be named as the arguments to the methods?
Thanks.
In MongoDB, a new DB and collection will be created only after a write operation, after inserting first document in a specific database and collection.
In MongoDB there is no CREATE TABLE like command/function, no need for that.
Your code does not create a collection since is not inserting new documents in new collection. In your code you don't need to worry about creating dbs or collections