CODEWITHSUNDEEP
ruby-on-railsrubytwitter-bootstrap
giovaZ
giovaZ

Reputation: 1470

Ruby on Rails presence of an error in a specific field

I'm defining the validation of some of my fields present in a table called "Contacts":

class Contact < ActiveRecord::Base
    validates :nome, :cognome, :indirizzo_abitazione, 
              :numero_civico, :indirizzo_email, :prefisso_cellulare, :cellulare, presence: true
    validates :nome, :cognome, :indirizzo_email, 
              :prefisso_cellulare, :cellulare, uniqueness: true
    validates :indirizzo_email, format: { with: /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\z/i, on: :create }
end

I want to exploit the bootstrap's class attribute 'has-error' to highlight a specific field in red if an error is present; so I tried to do this in this way:

  <div class="form-group <%= @contact.errors[:name] ? "has-error" : "" %>" >
    <%= f.label :name , :class => "control-label" %><br>
    <%= f.text_field :name, :class => "form-control" %>
  </div>

But when I log to this page the field is already red. Is there a method to see if, during the validation of one record, a specific field presents an error?

Upvotes: 5

Views: 3304

Answers (2)

Tucker
Tucker

Reputation: 659

@contact.errors[:name] returns an array of messages, if no messages are inside then @contact.errors[:name] will return only an empty array. An array is an object so your statement will always yield "has-error".

This will work:

<%= @contact.errors[:name].present? ? "has-error" : "" %>

Upvotes: 5

Stan
Stan

Reputation: 583

With @contact.errors[:name] ? "has-error" : "", you're printing has-error if @contact.errors[:name] is not nil. I think it's just empty.

Try to do @contact.errors[:name].blank? ? "" : "has-error" which means if it's blank (equivalent to 'is nil or empty'), don't add the class, else add the required class.

Upvotes: 0

Related Questions