migrate-project-memberships

Run the migration generator to have the required foreign keys added to
the database:

    $ hobo g migration

db/migrate/20130109030838_add_project_membership.rb

@@ -0,0 +1,16 @@
+class AddProjectMembership < ActiveRecord::Migration
+  def self.up
+    create_table :project_memberships do |t|
+      t.datetime :created_at
+      t.datetime :updated_at
+      t.integer  :project_id
+      t.integer  :user_id
+    end
+    add_index :project_memberships, [:project_id]
+    add_index :project_memberships, [:user_id]
+  end
+
+  def self.down
+    drop_table :project_memberships
+  end
+end

db/schema.rb

@@ -11,7 +11,17 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20130109025834) do
+ActiveRecord::Schema.define(:version => 20130109030838) do
+
+  create_table "project_memberships", :force => true do |t|
+    t.datetime "created_at"
+    t.datetime "updated_at"
+    t.integer  "project_id"
+    t.integer  "user_id"
+  end
+
+  add_index "project_memberships", ["project_id"], :name => "index_project_memberships_on_project_id"
+  add_index "project_memberships", ["user_id"], :name => "index_project_memberships_on_user_id"
 
   create_table "projects", :force => true do |t|
     t.string   "name"