domain blacklist

app/models/blacklisted_domain.rb

@@ -0,0 +1,8 @@
+class BlacklistedDomain < ActiveRecord::Base
+  attr_accessible :name
+  
+  def self.include?(name)
+    where("blacklisted_domains.name = ? OR ? LIKE CONCAT('%.', blacklisted_domains.name)",
+      name, name).exists?
+  end
+end

app/models/domain.rb

@@ -32,7 +32,9 @@ class Domain < ActiveRecord::Base
     validates_associated :"#{type.downcase}_records"
   end
   
-  validates :name, :presence => true, :uniqueness => true, :domainname => {:require_valid_tld => false}
+  validates :name, :presence => true, :uniqueness => true, 
+    :domainname => {:require_valid_tld => false},
+    :exclusion => {:in => BlacklistedDomain}
   validates :master, :presence => true, :if => :slave?
   validates :master, :ip => true, :allow_nil => true, :if => :slave?
   validates :type, :inclusion => { :in => @@types, :message => "Unknown domain type" }

config/initializers/rails_admin.rb

@@ -35,7 +35,7 @@ RailsAdmin.config do |config|
 
   # Add models here if you want to go 'whitelist mode':
   config.included_models = [A, AAAA, Admin, CNAME, Domain, MX, NS, Permission, 
-    Record, SOA, SRV, TXT, User, Audit]
+    Record, SOA, SRV, TXT, User, Audit, BlacklistedDomain]
 
   # Application wide tried label methods for models' instances
   # config.label_methods << :description # Default is [:name, :title]

db/migrate/20130421201234_create_blacklisted_domains.rb

@@ -0,0 +1,9 @@
+class CreateBlacklistedDomains < ActiveRecord::Migration
+  def change
+    create_table :blacklisted_domains do |t|
+      t.string :name
+
+      t.timestamps
+    end
+  end
+end

spec/factories.rb

@@ -40,4 +40,11 @@ FactoryGirl.define do
   factory :permission do
   end
   
+  factory :admin do
+  end
+  
+  factory :blacklisted_domain do
+    name {FactoryGirl.generate(:domain_name)}
+  end
+  
 end

spec/factories/admins.rb

@@ -1,6 +0,0 @@
-# Read about factories at http://github.com/thoughtbot/factory_girl
-
-FactoryGirl.define do
-  factory :admin do
-  end
-end

spec/models/blacklisted_domain_spec.rb

@@ -0,0 +1,5 @@
+require 'spec_helper'
+
+describe BlacklistedDomain do
+  pending "add some examples to (or delete) #{__FILE__}"
+end

spec/models/domain_spec.rb

@@ -77,6 +77,19 @@ describe Domain do
       domain.should have(1).errors_on(:name)
     end
   end
+  
+  it "validates blacklist" do
+    blacklisted_domain
+
+    domain.name = blacklisted_domain.name
+    domain.should have(1).errors_on(:name)
+
+    domain.name = "www.#{blacklisted_domain.name}"
+    domain.should have(1).errors_on(:name)
+
+    domain.name = "pre#{blacklisted_domain.name}"
+    domain.should have(0).errors_on(:name)
+  end
 
   it "queries domains corectly in index" do
     permission3

spec/support/shared_context/data.rb

@@ -31,5 +31,7 @@ shared_context "data" do
 
   let(:permission){create(:permission, :domain => domain, :user => user2)}
   let(:permission3){create(:permission, :domain => domain3, :user => user)}
+  
+  let(:blacklisted_domain){create(:blacklisted_domain)}
     
 end