Rails - conditional display of html block

Question

On my views I use 1 form that includes a block that renders comments. I do not want to run it when creating a new record. So, I tried conditions like so...

<% unless @annotation_id.nil? %>
<hr>
<div class="row">
  <div class="col-md-8">
    <h4>Comments</h4>
    <%= render @annotation.comments %>
  </div>

  <div class="col-md-4">
    <%= render 'comments/form' %>
  </div>

</div>
<% end %>

This however results in never displaying the block - also when the annotation record exists. What am I doing wrong?

@annotation_id is not a record. Are you assigning it anywhere? — Andrey Saleba
– Andrey Saleba, Commented Sep 2, 2016 at 14:31

Marcus · Accepted Answer · 2016-09-02 14:31:56Z

3

You don't show that you have actually set @annotation_id to something.

A simpler way might be to use the .new_record? method instead, like:

<% unless @annotation.new_record? %>
  ...
<% end %>

answered Sep 2, 2016 at 14:31

Marcus

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Comments

fanta · Accepted Answer · 2016-09-02 14:31:47Z

0

use if @annotation.persisted? or unless @annotation.new_record?

answered Sep 2, 2016 at 14:31

fanta

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