Question

In my method via some calculations a get data, then i need to view it in view, but if write

@ar.each do |a|

when i have only one record i get error, also when i have one error each is bad idea. So how to do this this?

So i have such code in method:

non_original = []
@articles.each do |a|
  non_original << get_non_tecdoc("LA44", 1, "KNECHT")
end
@non_original = non_original

get_non_tecdoc returns object, or nothing…

So in view i have:

-@non_original.each do |no|
      =no.brand
      =no.description
      =no.price
      =no.quantity

But what to do if @non_original has one record, then @non_original.each gives error. So how to do check in view? If @non_original has one record, than simple @non_original.brand etc, but if more than one, than use each loop?

Answer 1

<%= debug @ar %>

This will give you a nice YAML format to look at in your view (assuming ERB).

EDIT: I believe this is what you want, since you’re not interested in debugging.

In your controller, use the splat operator to convert a singleton element to an array (it doesn’t modify arrays):

@ar = *@ar

Then @ar.each will work as expected in your view.

Alternatively, you could check in your view:

<% if @ar.is_a?(Array) %>
  <% @ar.each ... %>
<% else %>
  <%= @ar %>
<% end%>