Where do I set template for rails error messages?

Question

I want rails to show error message

Field <field name> can't be blank

but using standard means I get

<field name> Field <field name> can't be blank

Here's a minimal example reproducing the problem:

rails new test
cd test
rails g scaffold user name
rake db:migrate

Add validation to app/models/user.rb:

class User < ActiveRecord::Base
  validates :name, presence: true
end

Edit config/locale/en.yml to be:

en:
  activerecord:
    attributes:
      user:
        name: "Name"
    errors:
      models:
        user:
          attributes:
            name:
              blank: "Field %{attribute} can't be blank"

After this start the server

rails s

point browser to http://localhost:3000/users/new and press "Create User" button. You'll get:

Apparently, there's another template somewhere, which says something like

%{attribute} %{message}

but I can't find it in rails code.

Possible duplicate of http://stackoverflow.com/questions/808547/fully-custom-validation-error-message-with-rails — aliibrahim, Jun 01 '16 at 13:42

score 1 · Accepted Answer · answered Jun 01 '16 at 14:16

This is because in a standard view generated by scaffold (views/users/_form.html.erb) you have:

<% user.errors.full_messages.each do |message| %>

This is what returns

Name Field Name can't be blank

Instead, you can modify the _form view and use user.errors.messages, where you get a hash with errors assigned to keys representing fields:

@user.errors.messages
{:name=>["Field Name can't be blank"]}

To get what you expect you could write for example:

<% @user.errors.messages.values.flatten.each do |message| %>
  <li><%= message %></li>
<% end %>

Where do I set template for rails error messages?

1 Answers1