added slug for seeds

app/models/seed.rb

@@ -1,6 +1,10 @@
 class Seed < ActiveRecord::Base
+  extend FriendlyId
+  friendly_id :seed_slug, use: :slugged
+
   attr_accessible :owner_id, :crop_id, :description, :quantity, :plant_before, 
-    :tradable_to
+    :tradable_to, :slug
+
   belongs_to :crop
   belongs_to :owner, :class_name => 'Member', :foreign_key => 'owner_id'
 
@@ -19,4 +23,8 @@ class Seed < ActiveRecord::Base
       return true
     end
   end
+
+  def seed_slug
+    "#{owner.login_name}-#{crop.system_name}".downcase.gsub(' ', '-')
+  end
 end

db/migrate/20130723110702_add_slug_to_seed.rb

@@ -0,0 +1,6 @@
+class AddSlugToSeed < ActiveRecord::Migration
+  def change
+    add_column :seeds, :slug, :string
+    add_index :seeds, :slug, unique: true
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20130723103128) do
+ActiveRecord::Schema.define(:version => 20130723110702) do
 
   create_table "account_types", :force => true do |t|
     t.string   "name",              :null => false
@@ -243,6 +243,9 @@ ActiveRecord::Schema.define(:version => 20130723103128) do
     t.datetime "created_at",                          :null => false
     t.datetime "updated_at",                          :null => false
     t.string   "tradable_to",  :default => "nowhere"
+    t.string   "slug"
   end
 
+  add_index "seeds", ["slug"], :name => "index_seeds_on_slug", :unique => true
+
 end

spec/models/seed_spec.rb

@@ -10,6 +10,11 @@ describe Seed do
     @seed.save.should be_true
   end
 
+  it "should have a slug" do
+    @seed.save
+    @seed.slug.should match(/member\d+-magic-bean/)
+  end
+
   context 'quantity' do
     it 'allows integer quantities' do
       @seed = FactoryGirl.build(:seed, :quantity => 99)