title: How to add properties to Ember model that you don't want to persist into database?
body: <p>I have a model, which has some properties that I obviously want to fetch from database. In addition to this I want to add a "checked" property to that model, which determines, if the actual model element is checked on the user interface. (for example a model record represents an email, and the checked property determines if it is selected for deletion) And obviously I don't want to persist it to the database, I would like to set a default value to this, and than change it via ui actions).</p>
  
  <p>My guess is that these kind of information should be stored at the controller level, but it is an ArrayController, so a single property in the controller won't do.</p>
  
  <p>I'm sure it's not too difficult to solve, but I'm a newbie, and I could not find the answer in the ember guide.</p>
  
  <p>Thanks!</p>