show validation error message from rails model

Question

Is it possible to show validation error messages from controller by making our method ? please check the code below

validate :validation
  def validation
    if self.RJan.nil? && self.RFeb.nil? && self.RMar.nil? && self.R1.nil?
      #How do write my error message here ?
    end
  end

and my form

<% if @record.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@record.errors.count, "error") %> prohibited this record from being saved:</h2>

      <ul>
      <% @record.errors.full_messages.each do |msg| %>
        <li><%= msg %></li>
      <% end %>
      </ul>
    </div>
  <% end %>

Pierre-Louis Gottfrois · Accepted Answer · 2013-06-25 18:49:22Z

1

You can add errors to your instance using

self.errors.add(:base, "your message here")

You could put attributes name as symbol instead of :base or whatever you like.

In your case

if self.RJan.nil? && self.RFeb.nil? && self.RMar.nil? && self.R1.nil?
  self.errors.add(:base, "your message here")
end

answered Jun 25, 2013 at 18:49

Pierre-Louis Gottfrois

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3 Comments

Hrishikesh Sardar Over a year ago

so in the model in the if block i should write self.errors.full_messages ?

Hrishikesh Sardar Over a year ago

apparently something is wrong and it is not showing error message for any validation!

Pierre-Louis Gottfrois Over a year ago

I answered your other thread. The code above is just to add new errors to your instance. Nothing to do with views or display mechanisms

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