Interests

app/helpers/form_helper.rb

@@ -1,6 +1,10 @@
 module FormHelper
   def setup_user(user)
     user.address ||= Address.new
+    (Interest.all - user.interests).each do |interest|
+      user.interest_users.build(:interest => interest)
+    end
+    user.interest_users.sort_by! {|x| x.interest.name }
     user
   end
 end

app/models/interest.rb

@@ -0,0 +1,3 @@
+class Interest < ActiveRecord::Base
+  validates_presence_of :name
+end

app/models/interest_user.rb

@@ -0,0 +1,4 @@
+class InterestUser < ActiveRecord::Base
+  belongs_to :user
+  belongs_to :interest
+end

app/models/user.rb

@@ -1,7 +1,10 @@
 class User < ActiveRecord::Base
   has_one :address
+  has_many :interest_users
+  has_many :interests, :through => :interest_users
 
   accepts_nested_attributes_for :address
+  accepts_nested_attributes_for :interest_users, :allow_destroy => true
 
   validates_presence_of :email
 end

app/views/users/_form.html.erb

@@ -23,6 +23,15 @@
     </div>
   <% end %>
 
+  <%= f.fields_for :interest_users do |ff| %>
+    <div>
+    <%= ff.hidden_field :id %>
+    <%= ff.hidden_field :interest_id %>
+    <%= ff.check_box :_destroy, {:checked => ff.object.persisted?}, '0', '1' %>
+    <%= ff.label :_destroy, ff.object.interest.name %>
+    </div>
+  <% end %>
+
   <div class="actions">
     <%= f.submit %>
   </div>

db/migrate/20110306221257_create_models.rb

@@ -11,6 +11,19 @@ def self.up
 
       t.string :city, :null => false
     end
+
+    create_table :interests do |t|
+      t.string :name, :null => false
+    end
+
+    ["Door Knocking", "Presenting", "Admin"].each do |x|
+      Interest.create!(:name => x)
+    end
+
+    create_table :interest_users do |t|
+      t.references :user
+      t.references :interest
+    end
   end
 
   def self.down

db/schema.rb

@@ -0,0 +1,35 @@
+# This file is auto-generated from the current state of the database. Instead
+# of editing this file, please use the migrations feature of Active Record to
+# incrementally modify your database, and then regenerate this schema definition.
+#
+# Note that this schema.rb definition is the authoritative source for your
+# database schema. If you need to create the application database on another
+# system, you should be using db:schema:load, not running all the migrations
+# from scratch. The latter is a flawed and unsustainable approach (the more migrations
+# you'll amass, the slower it'll run and the greater likelihood for issues).
+#
+# It's strongly recommended to check this file into your version control system.
+
+ActiveRecord::Schema.define(:version => 20110306221257) do
+
+  create_table "addresses", :force => true do |t|
+    t.integer "user_id"
+    t.string  "city",    :null => false
+  end
+
+  create_table "interest_users", :force => true do |t|
+    t.integer "user_id"
+    t.integer "interest_id"
+  end
+
+  create_table "interests", :force => true do |t|
+    t.string "name", :null => false
+  end
+
+  create_table "users", :force => true do |t|
+    t.string   "email",      :null => false
+    t.datetime "created_at"
+    t.datetime "updated_at"
+  end
+
+end