diff options
| -rw-r--r-- | activerecord/lib/active_record/base.rb | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb index d25a821688..d9ea48f7dd 100644 --- a/activerecord/lib/active_record/base.rb +++ b/activerecord/lib/active_record/base.rb @@ -114,23 +114,29 @@ module ActiveRecord #:nodoc: # Student.joins(:schools).where(:schools => { :category => 'public' }) # Student.joins(:schools).where('schools.category' => 'public' ) # + # == Dynamic assignment + # + # Sometimes it can be useful to assign some attributes dynamically. You can use + # <tt>read_attribute(attr_name, value)</tt>/<tt>write_attribute(attr_name)</tt> + # or through model[attr_name]/model[attr_name]=: + # + # [:deleted, :disabled].each{|p| model[p] = params[p] == 'true' } + # # == Overwriting default accessors # # All column values are automatically available through basic accessors on the Active Record # object, but sometimes you want to specialize this behavior. This can be done by overwriting - # the default accessors (using the same name as the attribute) and calling - # <tt>read_attribute(attr_name)</tt> and <tt>write_attribute(attr_name, value)</tt> to actually - # change things. + # the default accessors (using the same name as the attribute): # # class Song < ActiveRecord::Base # # Uses an integer of seconds to hold the length of the song # # def length=(minutes) - # write_attribute(:length, minutes.to_i * 60) + # write_attribute(:length, minutes.to_i * 60) # or: self[:length] = minutes.to_i * 60 # end # # def length - # read_attribute(:length) / 60 + # read_attribute(:length) / 60 # or: self[:length] / 60 # end # end # |