Adds sponsor model

app/models/conference.rb

@@ -33,6 +33,7 @@ class Conference < ActiveRecord::Base
   has_many :vpositions, :dependent => :destroy
   has_many :vchoices, :dependent => :destroy
   has_many :sponsorship_levels, dependent: :destroy
+  has_many :sponsors, dependent: :destroy
 
   belongs_to :venue
 

app/models/sponsor.rb

@@ -0,0 +1,12 @@
+class Sponsor < ActiveRecord::Base
+  attr_accessible :name, :description, :website_url, :logo
+  belongs_to :sponsorship_level
+  belongs_to :conference
+  has_attached_file :logo,
+                    styles: { thumb: '100x100>', large: '300x300>' }
+
+  validates_attachment_content_type :logo,
+                                    content_type: [/jpg/, /jpeg/, /png/, /gif/],
+                                    size: { in: 0..500.kilobytes }
+  validates_presence_of :name, :website_url
+end

app/models/sponsorship_level.rb

@@ -2,4 +2,5 @@ class SponsorshipLevel < ActiveRecord::Base
   attr_accessible :title
   validates_presence_of :title
   belongs_to :conference
+  has_many :sponsors
 end

db/migrate/20140605115251_create_sponsors.rb

@@ -0,0 +1,16 @@
+class CreateSponsors < ActiveRecord::Migration
+  def change
+    create_table :sponsors do |t|
+      t.string :name
+      t.text :description
+      t.string :website_url
+      t.string :logo_file_name
+      t.string :logo_content_type
+      t.integer :logo_file_size
+      t.datetime :logo_updated_at
+      t.belongs_to :sponsorship_level
+      t.belongs_to :conference
+      t.timestamps
+    end
+  end
+end

spec/factories/sponsors.rb

@@ -0,0 +1,11 @@
+# Read about factories at https://github.com/thoughtbot/factory_girl
+
+FactoryGirl.define do
+  factory :sponsor do
+    name 'Example sponsor'
+    website_url 'http://www.example.com'
+    description 'Lorem Ipsum Dolor'
+    sponsorship_level
+    conference
+  end
+end

spec/models/sponsor_spec.rb

@@ -0,0 +1,17 @@
+require 'spec_helper'
+
+describe Sponsor do
+  describe 'validations' do
+    it 'has a valid factory' do
+      expect(build(:sponsor)).to be_valid
+    end
+
+    it 'is not valid without a name' do
+      should validate_presence_of(:name)
+    end
+
+    it 'is not valid without a website url' do
+      should validate_presence_of(:website_url)
+    end
+  end
+end