Skip to content
This repository
tree: 9feda92940
Fetching contributors…

Octocat-spinner-32-eaf2f5

Cannot retrieve contributors at this time

file 65 lines (63 sloc) 2.983 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64
module ActiveRecord
  module Validations
    class PresenceValidator < ActiveModel::Validations::PresenceValidator
      def validate(record)
        super
        attributes.each do |attribute|
          next unless record.class.reflect_on_association(attribute)
          value = record.send(attribute)
          if Array(value).all? { |r| r.marked_for_destruction? }
            record.errors.add(attribute, :blank, options)
          end
        end
      end
    end

    module ClassMethods
      # Validates that the specified attributes are not blank (as defined by
      # Object#blank?), and, if the attribute is an association, that the
      # associated object is not marked for destruction. Happens by default
      # on save.
      #
      # class Person < ActiveRecord::Base
      # has_one :face
      # validates_presence_of :face
      # end
      #
      # The face attribute must be in the object and it cannot be blank or marked
      # for destruction.
      #
      # If you want to validate the presence of a boolean field (where the real values
      # are true and false), you will want to use
      # <tt>validates_inclusion_of :field_name, :in => [true, false]</tt>.
      #
      # This is due to the way Object#blank? handles boolean values:
      # <tt>false.blank? # => true</tt>.
      #
      # This validator defers to the ActiveModel validation for presence, adding the
      # check to see that an associated object is not marked for destruction. This
      # prevents the parent object from validating successfully and saving, which then
      # deletes the associated object, thus putting the parent object into an invalid
      # state.
      #
      # Configuration options:
      # * <tt>:message</tt> - A custom error message (default is: "can't be blank").
      # * <tt>:on</tt> - Specifies when this validation is active. Runs in all
      # validation contexts by default (+nil+), other options are <tt>:create</tt>
      # and <tt>:update</tt>.
      # * <tt>:if</tt> - Specifies a method, proc or string to call to determine if
      # the validation should occur (e.g. <tt>:if => :allow_validation</tt>, or
      # <tt>:if => Proc.new { |user| user.signup_step > 2 }</tt>). The method, proc
      # or string should return or evaluate to a true or false value.
      # * <tt>:unless</tt> - Specifies a method, proc or string to call to determine
      # if the validation should not occur (e.g. <tt>:unless => :skip_validation</tt>,
      # or <tt>:unless => Proc.new { |user| user.signup_step <= 2 }</tt>). The method,
      # proc or string should return or evaluate to a true or false value.
      # * <tt>:strict</tt> - Specifies whether validation should be strict.
      # See <tt>ActiveModel::Validation#validates!</tt> for more information.
      #
      def validates_presence_of(*attr_names)
        validates_with PresenceValidator, _merge_attributes(attr_names)
      end
    end
  end
end
Something went wrong with that request. Please try again.