Where and how to include Ember model functions

I am working on a simple Ember app that shows ID's for list elements. The ID's are computed with simple functions based on the element sequence (and some other simple factors). For example:

<div class="content-id element">[ELEMENT ID]</div>
<div class="content-name">{{element.name}}</div>

I don't want to hardcode the element id's into the JSON object, but rather compute them in a simple function. Would it be best to place this function in the route object or in the component? What's the syntax?

Thank you.