Methods
A
M
Included Modules
Classes and Modules
Instance Public methods
assign_attributes(new_attributes, options = {})

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

Source: show | on GitHub 

    # File activerecord/lib/active_record/attribute_assignment.rb, line 66
66:     def assign_attributes(new_attributes, options = {})
67:       return unless new_attributes
68: 
69:       attributes = new_attributes.stringify_keys
70:       multi_parameter_attributes = []
71:       nested_parameter_attributes = []
72:       @mass_assignment_options = options
73: 
74:       unless options[:without_protection]
75:         attributes = sanitize_for_mass_assignment(attributes, mass_assignment_role)
76:       end
77: 
78:       attributes.each do |k, v|
79:         if k.include?("(")
80:           multi_parameter_attributes << [ k, v ]
81:         elsif respond_to?("#{k}=")
82:           if v.is_a?(Hash)
83:             nested_parameter_attributes << [ k, v ]
84:           else
85:             send("#{k}=", v)
86:           end
87:         else
88:           raise(UnknownAttributeError, "unknown attribute: #{k}")
89:         end
90:       end
91: 
92:       # assign any deferred nested attributes after the base attributes have been set
93:       nested_parameter_attributes.each do |k,v|
94:         send("#{k}=", v)
95:       end
96: 
97:       @mass_assignment_options = nil
98:       assign_multiparameter_attributes(multi_parameter_attributes)
99:     end
attributes=(new_attributes)

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

Source: show | on GitHub 

    # File activerecord/lib/active_record/attribute_assignment.rb, line 33
33:     def attributes=(new_attributes)
34:       return unless new_attributes.is_a?(Hash)
35: 
36:       assign_attributes(new_attributes)
37:     end
Instance Protected methods
mass_assignment_options()

Source: show | on GitHub 

     # File activerecord/lib/active_record/attribute_assignment.rb, line 103
103:     def mass_assignment_options
104:       @mass_assignment_options ||= {}
105:     end
mass_assignment_role()

Source: show | on GitHub 

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