rivets.js each-* not displaying

Question

I'm trying to use rivets.js (via rivets-rails gem) to bind an array of straight JavaScript objects (no JS model library like Backbone etc), which are retrieved via JSON api in a Rails app.

The element to bind to (first HAML, then output):

%tr(rv-each-function="functions")
  %td { function.name }

<tr rv-each-function="functions">
  <td>{ function.name }</td>
</tr>

Binding code (CoffeeScript):

functions_table = rivets.bind $("#functions_table"), {functions: AdminData.Functions}

AdminData.Functions looks like this (via JSON.stringify):

[{"id":1,"name":"SomeData"},{"id":2,"name":"OtherData"},{"id":3,"name":"YetMoreData"}] 

When I inspect the rivets View functions_table via console.log, I see that tbody#functions_table is the sole member of functions_table.els and that functions_table.models.functions contains the expected Array of objects, yet the data isn't being bound, so the output in the page is just { function.name }, as shown in the first code block.

The rivets documentation is a bit inconsistent - the description shows that one should use data-item-* yet the example shows rv-item-* (see Usage Iteration in rivets docs). I've tried both.

Any pointers greatly appreciated. Cheers.