Question

I am trying to make a ajax call which will return and array of objects and display it on view.. I can display a single object of my class location but not able to iterate through array. I get the following error

ActionView::Template::Error (undefined method `model_name' for NilClass:Class):

My js file is

 $("#locations").append("<%= escape_javascript(render(@locations)) %>");

My partial file is _location.erb is

<div id="locations" class="locations">
  <% unless @locations.nil %>
    <% @locations.each do |location| %>
      <%= @locations.name %>
    <% end %>
  <% end %>

My controller looks like

 def search
   result = getResultFromSomeWhere
   @locations = Array.new(result.size)
   result.each do |resultobj|
     @locations.push(Location.new(resultobj))
   end
   respond_to do |format|
     format.js
   end
 end

I think its something to do with serialization as i am passing array of ActiveRecord objects?

Answer 1

Let’s say the size of result is 5, so then

@locations = Array.new(result.size) will return [nil, nil, nil, nil, nil]

and then you’re pushing locations to that array

[nil, nil, nil, nil, nil, location1, location2, ...]

Then you can see your mistake.