title: Rails 4: Add Multiple Columns to Existing Table
body: <p>I know how to add one column to an existing table. Now I have to add many columns to an existing table. Is there a shorter way for:</p>
  
  <pre><code>add_col1_col2_col3_col4_.._coln_to_tables col1:integer col2:integer etc...
  </code></pre>
  
  <p>Do I have to do the above for ALL the additional columns I have to add?</p>