diff --git a/plugins/communities_ratings/db/migrate/20150701122801_create_community_ratings.rb b/plugins/communities_ratings/db/migrate/20150701122801_create_community_ratings.rb
new file mode 100644
index 0000000..5534983
--- /dev/null
+++ b/plugins/communities_ratings/db/migrate/20150701122801_create_community_ratings.rb
@@ -0,0 +1,11 @@
+class CreateCommunityRatings < ActiveRecord::Migration
+  def change
+    create_table :community_ratings do |t|
+      t.belongs_to :community
+      t.belongs_to :person
+      t.integer :value
+
+      t.timestamps
+    end
+  end
+end
diff --git a/plugins/communities_ratings/lib/communities_ratings_plugin.rb b/plugins/communities_ratings/lib/communities_ratings_plugin.rb
new file mode 100644
index 0000000..ef85463
--- /dev/null
+++ b/plugins/communities_ratings/lib/communities_ratings_plugin.rb
@@ -0,0 +1,12 @@
+class CommunitiesRatingsPlugin < Noosfero::Plugin
+
+  def self.plugin_name
+    # FIXME
+    "CommunitiesRatingsPlugin"
+  end
+
+  def self.plugin_description
+    # FIXME
+    _("A plugin that does this and that.")
+  end
+end
diff --git a/plugins/communities_ratings/lib/community_rating.rb b/plugins/communities_ratings/lib/community_rating.rb
new file mode 100644
index 0000000..a453ca1
--- /dev/null
+++ b/plugins/communities_ratings/lib/community_rating.rb
@@ -0,0 +1,15 @@
+class CommunityRating < ActiveRecord::Base
+  belongs_to :person
+  belongs_to :community
+
+  attr_accessible :value, :person, :community
+
+  validates :value,
+            :presence => true, :inclusion => {
+              in: 0..5, message: _("must be between 0 and 5")
+            }
+
+  validates :community_id, :person_id,
+            :presence => true
+
+end
diff --git a/plugins/communities_ratings/lib/ext/community.rb b/plugins/communities_ratings/lib/ext/community.rb
new file mode 100644
index 0000000..a0e9a3b
--- /dev/null
+++ b/plugins/communities_ratings/lib/ext/community.rb
@@ -0,0 +1,5 @@
+require_dependency 'community'
+
+Community.class_eval do
+  has_many :community_ratings
+end
\ No newline at end of file
diff --git a/plugins/communities_ratings/lib/ext/person.rb b/plugins/communities_ratings/lib/ext/person.rb
new file mode 100644
index 0000000..f0839f7
--- /dev/null
+++ b/plugins/communities_ratings/lib/ext/person.rb
@@ -0,0 +1,5 @@
+require_dependency 'person'
+
+Person.class_eval do
+  has_many :community_ratings
+end
diff --git a/plugins/communities_ratings/test/unit/community_rating_test.rb b/plugins/communities_ratings/test/unit/community_rating_test.rb
new file mode 100644
index 0000000..b730537
--- /dev/null
+++ b/plugins/communities_ratings/test/unit/community_rating_test.rb
@@ -0,0 +1,14 @@
+require 'test_helper'
+
+class CommunityRatingTest < ActiveSupport::TestCase
+  test "The value must be between 0 and 5" do
+    cr1 = CommunityRating.new :value => -1
+    cr2 = CommunityRating.new :value => 6
+
+    assert_equal false, cr1.valid?
+    assert_equal false, cr2.valid?
+
+    assert_equal true, cr1.errors[:value].include?("must be between 0 and 5")
+    assert_equal true, cr2.errors[:value].include?("must be between 0 and 5")
+  end
+end
--
libgit2 0.21.2