diff options
Diffstat (limited to 'activerecord/lib/active_record/inheritance.rb')
| -rw-r--r-- | activerecord/lib/active_record/inheritance.rb | 37 |
1 files changed, 17 insertions, 20 deletions
diff --git a/activerecord/lib/active_record/inheritance.rb b/activerecord/lib/active_record/inheritance.rb index 2c766411a0..46d253b0a7 100644 --- a/activerecord/lib/active_record/inheritance.rb +++ b/activerecord/lib/active_record/inheritance.rb @@ -48,6 +48,20 @@ module ActiveRecord end # Set this to true if this is an abstract class (see <tt>abstract_class?</tt>). + # If you are using inheritance with ActiveRecord and don't want child classes + # to utilize the implied STI table name of the parent class, this will need to be true. + # For example, given the following: + # + # class SuperClass < ActiveRecord::Base + # self.abstract_class = true + # end + # class Child < SuperClass + # self.table_name = 'the_table_i_really_want' + # end + # + # + # <tt>self.abstract_class = true</tt> is required to make <tt>Child<.find,.create, or any Arel method></tt> use <tt>the_table_i_really_want</tt> instead of a table called <tt>super_classes</tt> + # attr_accessor :abstract_class # Returns whether this class is an abstract class or not. @@ -63,26 +77,9 @@ module ActiveRecord # single-table inheritance model that makes it possible to create # objects of different types from the same table. def instantiate(record, column_types = {}) - sti_class = find_sti_class(record[inheritance_column]) - record_id = sti_class.primary_key && record[sti_class.primary_key] - - if ActiveRecord::IdentityMap.enabled? && record_id - if (column = sti_class.columns_hash[sti_class.primary_key]) && column.number? - record_id = record_id.to_i - end - if instance = IdentityMap.get(sti_class, record_id) - instance.reinit_with('attributes' => record) - else - instance = sti_class.allocate.init_with('attributes' => record) - IdentityMap.add(instance) - end - else - column_types = sti_class.decorate_columns(column_types) - instance = sti_class.allocate.init_with('attributes' => record, - 'column_types' => column_types) - end - - instance + sti_class = find_sti_class(record[inheritance_column]) + column_types = sti_class.decorate_columns(column_types) + sti_class.allocate.init_with('attributes' => record, 'column_types' => column_types) end # For internal use. |