Add class to ember link-to

Use:

{{#link-to 'rent' rent class='btn btn-primary btn-small'}}Go to rent{{/link-to}}

As link-to is a view helper.

You can add classes just fine in {{#linkTo}} helpers, you just need to remember not to confuse ember.

Ember may think your class is the routeName of the params, I include the class after both params and routeName and it works fine.

{{#linkTo 'dashboard.screenshots' value.model class='thumbnail'}}
   ........
{{/linkTo}}

Produces

<a id="ember507" class="ember-view thumbnail" href="#/project-2/member-1/task-2/screenshot-30">
   .........
</a>

If you want manually construct something from variables - there is {{unbound}} helper in ember.js.

In yor case code will looks like:

<a href="/#/rents/{{unbound rend.id}}" class="btn btn-primary btn-small">
   do something
</a>