title: How to make changes made to an entity's attributes automatically cause a change in another entity?
body: <p>I have an entity named <em>Events</em> (parent entity) which contains the following attributes</p>
  
  <ol>
  <li>EventID</li>
  <li>EventStartDate</li>
  <li>EventEndDate</li>
  </ol>
  
  <p>which has 1-N relationship with another entity named <em>ChildEvents</em> which contains the following attributes</p>
  
  <ol>
  <li>ChildEventID</li>
  <li>EventID(lookup)</li>
  <li>EventStartDate(read-only)</li>
  <li>EventEndDate(read-only)</li>
  </ol>
  
  <p>I have written a JavaScript code that auto-populates the <em>EventStartDate</em> and <em>EventEndDate</em> when the <em>EventID</em> is updated.</p>
  
  <p>My question is this:</p>
  
  <p>I have an <code>EventID = "A"</code> with <code>EventStartDate = "today"</code> and <code>EventEndDate = "tomo"</code>
  and this is added to a <code>ChildEventID = "C_A"</code> and saved.</p>
  
  <p>I go back to my Events entity and change the start date and end date on <code>EventID = "A"</code> to something else and save the same.</p>
  
  <p>Now when I open the child event record <code>"C_A"</code> I do not see the <em>NewEventStartDate</em> and <em>NewEventEndDate</em> being updated automatically.</p>
  
  <p>Am I missing something? Do I have to write a code for it? Because I thought it would get updated automatically.</p>
  
  <p>Note: Both entities are customized entities.</p>