Rails 3 has_many :through + join table conditions / scoping

Question

I\'m working on an app that has the models User and Project, and User can be assigned to multiple Projects, via Project

Answer 1

Did you try using scopes yet? It doesn't let you do <<. But it simplifies querying.

Try:

Project
  scope :developers, lambda {
    includes(:project_users).where("project_users.role = ?", "developer")
  }

You will be able to get all developers using: @project.developers