How to conditionally display a div inside a html erb file in Ruby on Rails

Question

I want to display a Button based on wether the id exists.

_form.html.erb

<%= @customer.id? %>
    <div class="pull-right">
        <%= button_to 'Kundenrofil', customer_path(@customer), method: :get %>
   </div>
<%= end %>

I use this inside a form for making a new customer and also for editing a customer.

If I edit a customer everything works fine but if I make a new user it gives me an error because

id=nil

How do I do it in the _form.html.erb

score 3 · Accepted Answer · edited May 09 '18 at 05:34

3

<% unless @customer.id.nil? %>
    <div class="pull-right">
        <%= button_to 'Kundenrofil', customer_path(@customer), method: :get %>
   </div>
<% end %>

You have to put if/unless with expression. So change @customer.id? with unless @customer.id.nil?. Also notice <% instead of <%=. <%= is used when we want to render something on the page. <% is used to Execute the ruby code within the brackets. Change <%= end %> to <% end %>

Ref this to know about the differences.

edited May 09 '18 at 05:34

Akash Pinnaka

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answered May 08 '18 at 20:28

Salil

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Glad it works for you, do not forget to accept the answer. – Salil May 08 '18 at 20:34
2

How about just `if @customer.id`? – jvillian May 08 '18 at 20:48

How to conditionally display a div inside a html erb file in Ruby on Rails

1 Answers1