diff options
Diffstat (limited to 'activerecord')
| -rw-r--r-- | activerecord/lib/active_record/aggregations.rb | 2 | ||||
| -rw-r--r-- | activerecord/lib/active_record/core.rb | 24 | ||||
| -rw-r--r-- | activerecord/lib/active_record/nested_attributes.rb | 8 |
3 files changed, 28 insertions, 6 deletions
diff --git a/activerecord/lib/active_record/aggregations.rb b/activerecord/lib/active_record/aggregations.rb index a4db627535..c7a329d74d 100644 --- a/activerecord/lib/active_record/aggregations.rb +++ b/activerecord/lib/active_record/aggregations.rb @@ -71,7 +71,7 @@ module ActiveRecord # Now it's possible to access attributes from the database through the value objects instead. If # you choose to name the composition the same as the attribute's name, it will be the only way to # access that attribute. That's the case with our +balance+ attribute. You interact with the value - # objects just like you would any other attribute, though: + # objects just like you would with any other attribute: # # customer.balance = Money.new(20) # sets the Money value object and the attribute # customer.balance # => Money value object diff --git a/activerecord/lib/active_record/core.rb b/activerecord/lib/active_record/core.rb index ff2b0b5576..f5349b0bea 100644 --- a/activerecord/lib/active_record/core.rb +++ b/activerecord/lib/active_record/core.rb @@ -204,13 +204,35 @@ 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). + + ## + # :nodoc: def initialize_dup(other) cloned_attributes = other.clone_attributes(:read_attribute_before_type_cast) self.class.initialize_attributes(cloned_attributes) diff --git a/activerecord/lib/active_record/nested_attributes.rb b/activerecord/lib/active_record/nested_attributes.rb index 32a1dae6bc..95a2ddcc11 100644 --- a/activerecord/lib/active_record/nested_attributes.rb +++ b/activerecord/lib/active_record/nested_attributes.rb @@ -19,10 +19,10 @@ module ActiveRecord # = Active Record Nested Attributes # # Nested attributes allow you to save attributes on associated records - # through the parent. By default nested attribute updating is turned off, - # you can enable it using the accepts_nested_attributes_for class method. - # When you enable nested attributes an attribute writer is defined on - # the model. + # through the parent. By default nested attribute updating is turned off + # and you can enable it using the accepts_nested_attributes_for class + # method. When you enable nested attributes an attribute writer is + # defined on the model. # # The attribute writer is named after the association, which means that # in the following example, two new methods are added to your model: |