gistfile1.rhtml

*if block:*

Pretty straightforward.

<% if @property.floorplans.size == 1 %>
<div>Show This if the property only has 1 floorplan</div>
<% else %>
<div>Show This if the property has any other number of floorplans</div>
<% end %>

*unless block:*

unless is the opposite of an if. You can think of it as being an "if not" if that helps at all. Also I generally try to avoid unless + else because it can be a little bit hard to understand at first glance.

<% unless @property.floorplans.size == 1 %>
<div>Show This if the property has any other number of floorplans</div>
<% else %>
<div>Show This if the property only has 1 floorplan</div>
<% end %>