Rails 4: how can I DRY out my multiple form partials?

Question

My app has objects Foo and Bar, which each have corresponding models, views and controllers.

A form partial comes standard after generating scaffolding for each object.

Foo form partial looks something like...

<div class="form-inputs row">
  <div class="col-md-6">
    <%= Foo.donut %>
    <%= Foo.bagel %>
    <%= Foo.cookie %>
  </div>
</div>
<div class="form-inputs row">
  <div class="col-md-6">
    <%= Foo.biscuit %>
    <%= Foo.toast %>
    <%= Foo.muffin %>
  </div>
</div>

Bar form partial looks something like...

<div class="form-inputs row">
  <div class="col-md-6">
    <%= Bar.cat %>
  </div>
</div>
<div class="form-inputs row">
  <div class="col-md-6">
    <%= Bar.dog %>
  </div>
</div>

I want uniform formatting and I want it to be easy to maintain, but the objects have different attributes and different numbers of attributes. Is there a way for me to DRY out my formatting?

Answer 1

Since you have a repeating structure for rendering you could extract that into a partial and then pass the variables for rendering. So your partial looks like

<div class="form-inputs row">
  <div class="col-md-6">
    <% vals.each do |val|   %>
    <%= val %>
    <% end %>
  </div>
</div>

And in your main view you pass the variables for rendering.

<%= render 'home', vals: [Foo.biscuit, Foo.bagel] %>