CODEWITHSUNDEEP
ruby-on-railsformsvalidation
alt
alt

Reputation: 13907

Get validation errors on a partial's form

So I have a form in my Rails app that's on a _form.html.erb.

I'm displaying this partial on every page of my site, so it doesn't really have any model logic behind it, and the User created form it is made on the fly in the view:

<%= form_for User.new, :validate => true do |f| %>
  <table>
    <tr>
      <td><%= f.label :invitation_token, "Invite Token" %></td>
      <td><%= f.text_field :invitation_token, :placeholder => "From your inbox&hellip;".html_safe %></td>
    </tr>
    <tr>
      <td colspan="2"><br><%= f.submit "Sign Up" %></td>
    </tr>
  </table>
<% end %>

I have some validations in my User model, but how would I display those validation errors in my view after reload?

I've tried User.new.errors.inspect but the messages parameter is always empty, even if there's a validation error.

Upvotes: 1

Views: 278

Answers (1)

fontno
fontno

Reputation: 6852

There are a few ways to do this. Since you will likely want to render these error messages in many places, create a shared folder in your views app/views/shared/_error_messages.html.erb and add this partial:

<% if object.errors.any? %>
  <ul>
    <% object.errors.full_messages.each do |msg| %>
      <li>* <%= msg %></li>
    <% end %>
  </ul>
<% end %>

Now in your view add the code to render the error messages in you form just below form for

<%= render 'shared/error_messages', object: f.object %>

Upvotes: 2

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