diff options
Diffstat (limited to 'activerecord/lib/active_record/core.rb')
| -rw-r--r-- | activerecord/lib/active_record/core.rb | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/activerecord/lib/active_record/core.rb b/activerecord/lib/active_record/core.rb index a869ed8c04..b2ed606e5f 100644 --- a/activerecord/lib/active_record/core.rb +++ b/activerecord/lib/active_record/core.rb @@ -77,7 +77,7 @@ module ActiveRecord ## # :singleton-method: - # Specifies wether or not has_many or has_one association option + # Specifies whether or not has_many or has_one association option # :dependent => :restrict raises an exception. If set to true, the # ActiveRecord::DeleteRestrictionError exception will be raised # along with a DEPRECATION WARNING. If set to false, an error would @@ -127,10 +127,16 @@ module ActiveRecord object.is_a?(self) end + # Returns an instance of <tt>Arel::Table</tt> loaded with the curent table name. + # + # class Post < ActiveRecord::Base + # scope :published_and_commented, published.and(self.arel_table[:comments_count].gt(0)) + # end def arel_table @arel_table ||= Arel::Table.new(table_name, arel_engine) end + # Returns the Arel engine. def arel_engine @arel_engine ||= connection_handler.retrieve_connection_pool(self) ? self : active_record_super.arel_engine end @@ -205,13 +211,34 @@ module ActiveRecord self end + ## + # :method: clone + # Identical to Ruby's clone method. This is a "shallow" copy. Be warned that your attributes are not copied. + # That means that modifying attributes of the clone will modify the original, since they will both point to the + # same attributes hash. If you need a copy of your attributes hash, please use the #dup method. + # + # user = User.first + # new_user = user.clone + # user.name # => "Bob" + # new_user.name = "Joe" + # user.name # => "Joe" + # + # user.object_id == new_user.object_id # => false + # user.name.object_id == new_user.name.object_id # => true + # + # user.name.object_id == user.dup.name.object_id # => false + + ## + # :method: dup # Duped objects have no id assigned and are treated as new records. Note # that this is a "shallow" copy as it copies the object's attributes # only, not its associations. The extent of a "deep" copy is application # specific and is therefore left to the application to implement according # to its need. # The dup method does not preserve the timestamps (created|updated)_(at|on). - def initialize_dup(other) + + ## + def initialize_dup(other) # :nodoc: cloned_attributes = other.clone_attributes(:read_attribute_before_type_cast) self.class.initialize_attributes(cloned_attributes) |