Module: ActiveRecord::AttributeAssignment

Extended by:
ActiveSupport::Concern
Includes:
ActiveModel::MassAssignmentSecurity
Included in:
Base
Defined in:
lib/active_record/attribute_assignment.rb

Defined Under Namespace

Modules: ClassMethods

Instance Method Summary collapse

Instance Method Details

#assign_attributes(new_attributes, options = {}) ⇒ Object

Allows you to set all the attributes for a particular mass-assignment security role by passing in a hash of attributes with keys matching the attribute names (which again matches the column names) and the role name using the :as option.

To bypass mass-assignment security you can use the :without_protection => true option.

class User < ActiveRecord::Base
  attr_accessible :name
  attr_accessible :name, :is_admin, :as => :admin
end

user = User.new
user.assign_attributes({ :name => 'Josh', :is_admin => true })
user.name       # => "Josh"
user.is_admin?  # => false

user = User.new
user.assign_attributes({ :name => 'Josh', :is_admin => true }, :as => :admin)
user.name       # => "Josh"
user.is_admin?  # => true

user = User.new
user.assign_attributes({ :name => 'Josh', :is_admin => true }, :without_protection => true)
user.name       # => "Josh"
user.is_admin?  # => true

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# File 'lib/active_record/attribute_assignment.rb', line 66

def assign_attributes(new_attributes, options = {})
  return if new_attributes.blank?

  attributes = new_attributes.stringify_keys
  multi_parameter_attributes = []
  nested_parameter_attributes = []
  @mass_assignment_options = options

  unless options[:without_protection]
    attributes = sanitize_for_mass_assignment(attributes, mass_assignment_role)
  end

  attributes.each do |k, v|
    if k.include?("(")
      multi_parameter_attributes << [ k, v ]
    elsif respond_to?("#{k}=")
      if v.is_a?(Hash)
        nested_parameter_attributes << [ k, v ]
      else
        send("#{k}=", v)
      end
    else
      raise(UnknownAttributeError, "unknown attribute: #{k}")
    end
  end

  # assign any deferred nested attributes after the base attributes have been set
  nested_parameter_attributes.each do |k,v|
    send("#{k}=", v)
  end

  @mass_assignment_options = nil
  assign_multiparameter_attributes(multi_parameter_attributes)
end

#attributes=(new_attributes) ⇒ Object

Allows you to set all the attributes at once by passing in a hash with keys matching the attribute names (which again matches the column names).

If any attributes are protected by either attr_protected or attr_accessible then only settable attributes will be assigned.

class User < ActiveRecord::Base
  attr_protected :is_admin
end

user = User.new
user.attributes = { :username => 'Phusion', :is_admin => true }
user.username   # => "Phusion"
user.is_admin?  # => false

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# File 'lib/active_record/attribute_assignment.rb', line 33

def attributes=(new_attributes)
  return unless new_attributes.is_a?(Hash)

  assign_attributes(new_attributes)
end