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CaptainCarl
CaptainCarl

Reputation: 3489

Counting in View Rails

I've got a list of items I'm looping in an each in my show view. This is all perfectly fine. However, I would like to get a number infront of each item which increments with every loop ( i = 0, i++ you know the drill ).

Now, how can i do this in Rails? This is what I get by now:

<% i = 0 %>
<% @trip.triplocations.each do |tl| %>
  <article id="<%= dom_id(tl)  %>">
    <strong> <%= tl.title %> </strong>
      <p>
        <%= tl.description %>
      </p>
  </article>
<% end %>

Upvotes: 6

Views: 2016

Answers (3)

waldyr.ar
waldyr.ar

Reputation: 15184

Use #each_with_index instead of instantiating a variable in view!

<% @trip.triplocations.each_with_index do |tl, i| %>
  <article id="<%= dom_id(tl) %>">
    <strong> <%= i %>. <%= tl.title %> </strong>
      <p>
        <%= tl.description %>
      </p>
  </article>
<% end %>

Upvotes: 13

Simon Perepelitsa
Simon Perepelitsa

Reputation: 20639

There is no ++ operator in Ruby. Instead you use += 1:

array = 'a'..'d'

i = 0
array.each do |element|
  puts "#{i} #{element}"
  i += 1
end

Prints

0 a
1 b
2 c
3 d

However, you should not do that because there is already a convenient method for that:

array = 'a'..'d'

array.each_with_index do |element, i|
  puts "#{i} #{element}"
end

There is another way of doing that specific to Rails. If you render collection using a partial you will have object_counter variable available where "object" is your model name. For example:

<%= render @trip.triplocations %>

<% # in views/triplocations/_triplocation.html.erb %>
<%= triplocation_counter %>
<%= triplocation.title %>

Upvotes: 0

RAM
RAM

Reputation: 2419

Probably you want this sort of code.

<% i = 0 %>
<% @trip.triplocations.each do |tl| %>
    <article id="<%= dom_id(tl)  %>">
        <strong> <%= tl.title %> </strong>
        <p>
            <%= i %>
            <%= tl.description %>

        </p>
    </article>
    <% i = i + 1 %> 
<% end %>

Note:

You can place the code 

<%= i %>

anywhere you want inside the loop.

Upvotes: 0

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