CODEWITHSUNDEEP
ruby-on-railsvalidation
Brian Roisentul
Brian Roisentul

Reputation: 4730

How to update attributes without validation

I've got a model with its validations, and I found out that I can't update an attribute without validating the object before.

I already tried to add on => :create syntax at the end of each validation line, but I got the same results.

My announcement model have the following validations:

  validates_presence_of :title
  validates_presence_of :description
  validates_presence_of :announcement_type_id

  validate :validates_publication_date
  validate :validates_start_date
  validate :validates_start_end_dates
  validate :validates_category
  validate :validates_province

  validates_length_of :title, :in => 6..255, :on => :save
  validates_length_of :subtitle, :in => 0..255, :on => :save
  validates_length_of :subtitle, :in => 0..255, :on => :save
  validates_length_of :place, :in => 0..50, :on => :save

  validates_numericality_of :vacants, :greater_than_or_equal_to => 0,  :only_integer => true
  validates_numericality_of :price, :greater_than_or_equal_to => 0,  :only_integer => true

My rake task does the following:

  task :announcements_expiration => :environment do
    announcements = Announcement.expired

    announcements.each do |a|
      #Gets the user that owns the announcement
      user = User.find(a.user_id)
      puts a.title + '...'

      a.state = 'deactivated'

      if a.update_attributes(:state => a.state)
        puts 'state changed to deactivated'
      else
        a.errors.each do |e|
          puts e
        end

      end
    end

This throws all the validation exceptions for that model, in the output.

Does anybody how to update an attribute without validating the model?

Upvotes: 176

Views: 204953

Answers (6)

Olivier Grimard
Olivier Grimard

Reputation: 2931

You can do something like:

object.attribute = value
object.save(validate: false)

Upvotes: 255

Salil
Salil

Reputation: 47472

USE update_attribute instead of update_attributes

Updates a single attribute and saves the record without going through the normal validation procedure.

if a.update_attribute('state', a.state)

Note:- 'update_attribute' update only one attribute at a time from the code given in question i think it will work for you.

Upvotes: 218

res
res

Reputation: 1225

try using 

@record.assign_attributes({ ... })
@record.save(validate: false)

works for me

Upvotes: 104

MZaragoza
MZaragoza

Reputation: 10111

All the validation from model are skipped when we use validate: false

user = User.new(....)
user.save(validate: false)

Upvotes: 10

William Wong Garay
William Wong Garay

Reputation: 1941

Yo can use:

a.update_column :state, a.state

Check: http://apidock.com/rails/ActiveRecord/Persistence/update_column

Updates a single attribute of an object, without calling save.

Upvotes: 50

Saifis
Saifis

Reputation: 2237

Shouldn't that be 

validates_length_of :title, :in => 6..255, :on => :create

so it only works during create?

Upvotes: 0

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