### Home Classes Methods

### In Files

- lib/active_record/attribute_assignment.rb

### Namespace

- MODULE ActiveRecord::AttributeAssignment::ClassMethods

### Methods

- #assign_attributes
- #attributes=
- #mass_assignment_options
- #mass_assignment_role

### Included Modules

- ActiveModel::MassAssignmentSecurity

### Files

- README.rdoc

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# ActiveRecord::AttributeAssignment

### Public Instance Methods

assign_attributes(new_attributes, options = {}) click to toggle source

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

    # 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) click to toggle source

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

    # 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

### Protected Instance Methods

mass_assignment_options() click to toggle source

    # File lib/active_record/attribute_assignment.rb, line 103
    def mass_assignment_options
      @mass_assignment_options ||= {}
    end

mass_assignment_role() click to toggle source

    # File lib/active_record/attribute_assignment.rb, line 107
    def mass_assignment_role
      mass_assignment_options[:as] || :default
    end

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