user-has-many-joined-projects

And in the User model (remember that User already has an association called `projects` so we need a new name):

SHOW_PATCH

app/models/user.rb

@@ -14,6 +14,8 @@ class User < ActiveRecord::Base
   has_many :task_assignments, :dependent => :destroy
   has_many :tasks, :through => :task_assignments
   has_many :projects, :class_name => "Project", :foreign_key => "owner_id"
+  has_many :project_memberships, :dependent => :destroy
+  has_many :joined_projects, :through => :project_memberships, :source => :project
 
   # This gives admin rights and an :active state to the first sign-up.
   # Just remove it if you don't want that