title: permission denied to create extension "uuid-ossp"
body: <p>I'm building a Rails project on postgresql, but when I</p>
  
  <pre><code>rake db:migrate
  </code></pre>
  
  <p>I get the following error:</p>
  
  <pre><code> permission denied to create extension "uuid-ossp"
  </code></pre>
  
  <p>Here's how my database.yml looks like:</p>
  
  <pre><code>app_common: &amp;app_common
  adapter: postgresql
  host: 127.0.0.1
  port: 5432
  encoding: unicode
  pool: 5
  username: root
  password:
  </code></pre>