title: Workflow in odoo
body: <p>I want to modify workflow sales.order using Workflow editor. 
  I created activities and transitions between them.
  After click on button user must transmit to another activity(workflow state) but nothing change. 
  Next activity in action block has such python action:</p>
  
  <pre><code>write('state': 'maket_completed')
  </code></pre>
  
  <p>I tried to use server action with set same state sales.order
  sales.order state field not changed.
  I read for it docs and "Working with Odoo" and can not undestend where is my mistake.
  Can you help me?</p>