title: Add Custom Field on Odoo General Ledger Report
body: <p>I have tried to add Custom field called x_gstn in Odoo General Ledger Report But It Shows the Following Error</p>
  
  <pre><code>    Odoo Server Error
      Traceback (most recent call last):
  
  Traceback (most recent call last):
    File "/usr/lib/python2.7/dist-packages/odoo/addons/base/ir/ir_qweb/qweb.py", line 315, in _compiled_fn
      return compiled(self, append, values, options, log)
    File "&lt;template&gt;", line 1, in template_579_43993
    File "&lt;template&gt;", line 3, in body_call_content_43992
    File "&lt;template&gt;", line 8, in body_call_content_43991
    File "&lt;template&gt;", line 59, in foreach_43990
    File "&lt;template&gt;", line 77, in foreach_43989
  KeyError: 'x_gstn'
  
  Error to render compiling AST
  KeyError: 'x_gstn'
  Template: 579
  Path: /templates/t/t/t[4]/div/table/tbody/t/tr[2]/td[4]/span
  Node: &lt;span t-esc="line['x_gstn']"/&gt;
  </code></pre>
  
  <p>So I Don't How to Rectify it</p>
  
  <p>Kindly Share your Ideas with me...</p>