You are building an app for a gym. But this is not just any gym. It has many locations and many trainers. Each trainer has clients that can work out of any location provided that they have a trainer.
- your models are locations, trainers and clients
- a location has many trainers
- a trainer has many locations
- a trainer has many clients
- a client has one trainer
- how is a client related to a location?
Write out the relationships using has_many, belongs_to and has_many_through. Write out a schema that shows what these tables might look like in a database. Where would the foreign keys live? Then build out methods reflecting all these relationships. What method can I call on a location to find all its clients, etc?
- #assign_trainer
- should take a trainer as argument and assign it to the client
- .least_clients
- should find which location has the least clients training there. we need to increase the marketing spend for that location!
- .most_clients
- should find which trainer has the most clients. give that trainer a bonus!