title: SalesForce, How do I update a field on one object from using data from another obj?
body: <p>In SalesForce.  I have 3 objects in an MDR:</p>
  
  <pre><code>obj_1 ---&lt; obj_2 &gt;--- Contacts.
  </code></pre>
  
  <p><strong>Object_1</strong> = meeting types and budget</p>
  
  <p><strong>Object_2</strong> = attendees at each meeting and money spent on each.</p>
  
  <p>Each time a record involving a contact in obj_2 gets updated, I need to update a field in the contacts object ONLY if the meeting took place in the past year.</p>
  
  <p>How do I do this?  Workflows?  Formulas?</p>