Multi Tenancy

mgod comes with the built-in support for multi-tenancy, enabling the use of a single Go struct with multiple databases. This feature allows creation of multiple EntityMongoModel of the same Go struct to be attached to different databases while using the same underlying MongoDB client connection.

Usage

Create separate EntityMongoModel for different tenants using same Go struct and corresponding databases.

type User struct {
	Name    string
	EmailID string `bson:"emailId"`
	Amount  float32
}
collection := "users"

tenant1DB := "tenant1"
tenant2DB := "tenant2"

tenant1Model, _ := mgod.NewEntityMongoModelOptions(tenant1DB, collection, nil)
tenant2Model, _ := mgod.NewEntityMongoModelOptions(tenant2DB, collection, nil)

These models can now be used simultaneously inside the same service logic as well as in a transaction operation.

amount := 10000

tenant1Model.UpdateMany(context.TODO(), bson.M{"name": "Gopher Tenant 1"}, bson.M{"$inc": {"amount": -amount}})
tenant2Model.UpdateMany(context.TODO(), bson.M{"name": "Gopher Tenant 2"}, bson.M{"$inc": {"amount": amount}})

note

The EntityMongoModel is always bound to the specified database at the time of its declaration and, as such, cannot be used to perform operations across multiple databases.

result, _ := tenant1Model.FindOne(context.TODO(), bson.M{"name": "Gopher Tenant 2"})
// result will be <nil> value in this case

Usage​

Usage