Adding domain blocks

db/migrate/20161009120834_create_domain_blocks.rb

@@ -0,0 +1,10 @@
+class CreateDomainBlocks < ActiveRecord::Migration[5.0]
+  def change
+    create_table :domain_blocks do |t|
+      t.string :domain, null: false, default: ''
+      t.timestamps
+    end
+
+    add_index :domain_blocks, :domain, unique: true
+  end
+end