Combine 2 models into one array, paginate, and force 1 partial - ruby-on-rails

Question

I want to combine data from two different models, combine it into one array and use the will_paginate gem to paginate the results in my view on that collection. I'm already using require 'will_paginate/array' to allow for a normal, non-ActiveRecord array and its all working properly.
My problem is that its using two different partials to render the entries based on which model the data originated from. How do I force it render one specific partial?
controller
def sample_action
page = params[:page] || 1
#collection = []
#car.messages.select {|msg| #collection << msg}
Alerts.where(car_id: #car.id).select {|alerts| #collection << alerts}
#collection = #collection.sort{|a,b| b[:created_at] <=> a[:created_at]}
#collection = #collection.paginate(:page => page, :per_page => 30)
respond_to do |format|
format.html { render :sample_action }
end
end
view
<% if #collection.count > 0 %>
<div class="row">
<div class="col-xs-12">
<div id="car-alerts" class="car-alerts-all">
<%= render #collection -%>
</div>
</div>
</div>
<%= will_paginate #collection -%>
<% else %>
<p class="no-alerts-message">Your car is healthy</p>
<% end %>
car partial
Car - <%= collection.id %>
<br>
alert partial
Alert - <%= collection.id %>
<br>

Answer 1

I would use the fact that you basically just want to output the model name and do this:
<% if #collection.count > 0 %>
<div class="row">
<div class="col-xs-12">
<div id="car-alerts" class="car-alerts-all">
<%- #collection.each do |obj| -%>
<%= obj.class.to_s -%> - <%= obj.id %>
</div>
</div>
</div>
<%= will_paginate #collection -%>
<% else %>
<p class="no-alerts-message">Your car is healthy</p>
<% end %>
but it would break easily if you wanted to add labels different to class names.

Answer 2

You need to iterate over each item in the collection and have a conditional based on the model type, so for example:
<div id="car-alerts" class="car-alerts-all">
<% #collection.each do |car_or_alert| %>
<%=
if car_or_alert.is_a?(Alert)
render :alert #you need to add locals here as well, but it unclear what locals you are using
else
render :car #see above
end %>
<% end %>
</div>

Answer 3

Turns out it was as simple as setting the partial from render
<% if #collection.count > 0 %>
<div class="row">
<div class="col-xs-12">
<div id="car-alerts" class="car-alerts-all">
<%= render collection: #collection, partial: 'car/partial_name' -%>
</div>
</div>
</div>
<%= will_paginate #collection -%>
<% else %>
<p class="no-alerts-message">Your car is healthy</p>
<% end %>
This being the key change -
<%= render collection: #collection, partial: 'car/partial_name' -%>