Multi-tentant model and nosql?

Question

When doing multi-tenant applications using a RDMBS I use tenantId columns in each table to indicate which tenant a row belongs to.

How would I do that in a DocumentDatabase? Let's take mongodb for instance. Is DBRef the way to go? Or am I stuck in the relational thinking? Or would you use something other than a documentdb?

(I'm pretty new to nosql)

Answer 1

If you have a need for Multitenancy under MongoDB you could use a different collection for each tenant. If the data is shared among all tenants I would instead keep a list of tenants for each entry like so:

doc: {
  _id: doc1
  ... // your objects here
  tenants: [ tenant1, tenant2, tenant17 ]
}

Then when I do a search or want a view of the database you should query with the relevant tenant:

db.mycoll.find({ someField : someValue, tenants : tenant2 });