Randomly display 8 crops on the garden page

app/helpers/application_helper.rb

@@ -1,2 +1,7 @@
 module ApplicationHelper
+
+  def random_crop
+    Crop.random
+  end
+
 end

app/models/crop.rb

@@ -3,4 +3,9 @@ class Crop < ActiveRecord::Base
   friendly_id :system_name, use: :slugged
   attr_accessible :en_wikipedia_url, :system_name
   has_many :scientific_names
+
+  def Crop.random
+    @crop = Crop.offset(rand(Crop.count)).first
+    return @crop
+  end
 end

app/views/gardens/show.html.haml

@@ -14,12 +14,14 @@
   .span9
 
     %h2 What's planted here?
+    %div.alert
+      %button.close{:type => 'button', 'data-dismiss' => 'alert'} ×
+      Note: these are a random selection, and don't represent actual plantings
+
     %ul.thumbnails
       - (1..8).each do
         %li.span2
-          .thumbnail
-            = image_tag('http://placehold.it/150x150', :alt => '', :class => 'img-rounded')
-            Crop name
+          = render :partial => "crops/thumbnail", :locals => { :crop => random_crop }
 
     %h2 Updates
 

spec/models/crop_spec.rb

@@ -1,4 +1,4 @@
-require 'spec_helper'
+rGkequire 'spec_helper'
 
 describe Crop do
   context 'all fields present' do
@@ -27,4 +27,18 @@ describe Crop do
       expect { @crop.save }.to raise_error ActiveRecord::StatementInvalid
     end
   end
+
+  context 'random' do
+    before(:each) do
+      @crop = Crop.new
+      @crop.system_name = "Tomato"
+      @crop.en_wikipedia_url = "http://en.wikipedia.org/wiki/Tomato"
+      @crop.save
+    end
+
+    it 'should find a random crop' do
+      @rand_crop = Crop.random
+      @rand_crop.system_name.should == 'Tomato'
+    end
+  end
 end