How to check if variable is empty in rails view?

Question

I am using paperclip in my rails app. I want to use an image uploaded via paperclip if an attribute appears for the field and use another image if it doesn't. With this code, the first portion of the if statement always executes regardless of whether there is an entry in the logo field. Any advice?

        <% if @product.logo.url %>
            <%= image_tag @product.logo.url, :style => 'width:60px;' %>
        <% else %>
            <img src = '/assets/logo/<%= @product.slug.downcase %>-sq.jpg' class="img-circle" style = 'width:60px;'>
        <% end %>

Andy · Accepted Answer · 2013-05-25 23:16:01Z

3

You probably want to try calling String#blank?:

<% if @project.logo.url.blank? %>
    <%= image_tag @product.logo.url, :style => 'width:60px;' %>
<% else %>
    <img src = '/assets/logo/<%= @product.slug.downcase %>-sq.jpg' class="img-circle" style = 'width:60px;'>
<% end %>

edited May 25, 2013 at 23:16

answered May 25, 2013 at 22:49

Andy

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5 Comments

sharataka Over a year ago

I've tried both empty and nil and they both don't seem to work. It seems to go to the second part of the if/else statement.

Sergio Tulentsev Over a year ago

.blank? checks for both empty string and nil.

sharataka Over a year ago

Blank executes the 2nd part of the if/else only as well.

Andy Over a year ago

@SergioTulentsev blank would be better, I'll update my answer.

Andy Over a year ago

@sharataka are you sure the url is empty? have you tried seeing what the value of the url is?

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