Ruby on Rails: How to customise error message for MailForm when field is blank

Question

At the moment, if I leave a field in the form blank, I get an error message that is written in the en.yml file, how can I overwrite this error message in the model?

class Contact < MailForm::Base
  attribute :name,      :validate => true
  attribute :email,     :validate => /\A([\w\.%\+\-]+)@([\w\-]+\.)+([\w]{2,})\z/i
  attribute :message,   :validate => true
  attribute :nickname,  :captcha  => true

This is what I've tried for the name attribute but I'm still getting the error message which is written in the en.yml file. I can't change the error message from en.yml as it is for another part of my application.

  validates :name, presence: { message: "Can't be blank" }

Any ideas why this is not overwriting the message?

score 4 · Accepted Answer · answered May 12 '16 at 19:16

4

You can customize the error message using i18n localization in the same way that you would for a regular ActiveRecord model. The only difference is that you use the mail_form top-level scope instead of active_record.

# en.yml
mail_form:
   errors:
      models:
         contact:
            attributes:
               name: 
                  blank: "My custom message goes here"

sources:

answered May 12 '16 at 19:16

Carlos Ramirez III

7,314
26
33

1

where can i get the full list of keywords? e.g. for "email already taken" what should i put in place of `blank` field. – Rajan Verma - Aarvy Jun 23 '21 at 10:59

Anthony E · Answer 2 · 2016-05-12T18:32:33.370

0

You don't need to nest the message in an inner hash. The syntax for messages on validations is:

attribute :name, validate: true

Not very elegant, but you can set the error message manually:

contact = Contact.new
contact.valid?  # => false
contact.errors[:name] = "Can't be blank"  # => Will add "Can't be blank to the list of errors associated with  name"

Or, if you want to replace the original error:

contact.errors.set(:name, "Can't be blank")

edited May 12 '16 at 18:32

answered May 12 '16 at 18:22

Anthony E

11,072
2
24
44

This just gave me an error: Unknown validator: 'MessageValidator' – ChatNoir May 12 '16 at 18:25
You're right, I thought you were extending `ActiveRecord::Base`. I've updated my answer. – Anthony E May 12 '16 at 18:32
This had no effect – ChatNoir May 12 '16 at 18:50

score 0 · Answer 3 · answered May 12 '16 at 19:38

If the above answers are not working (try them out first, rails is good with error messages) you could use JQuery to validate the fields before submit, there is a plugin for that https://jqueryvalidation.org/

From there site

    $("#myform").validate({
  submitHandler: function(form) {
    // some other code
    // maybe disabling submit button
    // then:
    $(form).submit();
  }
 });

Ruby on Rails: How to customise error message for MailForm when field is blank

3 Answers3