Remove ActiveRecord::Base#class_name [#379 state:committed]

Signed-off-by: NJosé Valim <jose.valim@gmail.com>

activerecord/lib/active_record/base.rb

@@ -720,14 +720,6 @@ def set_sequence_name(value = nil, &block)
       end
       alias :sequence_name= :set_sequence_name
 
-      # Turns the +table_name+ back into a class name following the reverse rules of +table_name+.
-      def class_name(table_name = table_name) # :nodoc:
-        # remove any prefix and/or suffix from the table name
-        class_name = table_name[table_name_prefix.length..-(table_name_suffix.length + 1)].camelize
-        class_name = class_name.singularize if pluralize_table_names
-        class_name
-      end
-
       # Indicates whether the table associated with this class exists
       def table_exists?
         connection.table_exists?(table_name)

activerecord/test/cases/base_test.rb

@@ -798,25 +798,6 @@ def test_attribute_keys_on_new_instance
     assert_raise(NoMethodError) { t.title2 }
   end
 
-  def test_class_name
-    assert_equal "Firm", ActiveRecord::Base.class_name("firms")
-    assert_equal "Category", ActiveRecord::Base.class_name("categories")
-    assert_equal "AccountHolder", ActiveRecord::Base.class_name("account_holder")
-
-    ActiveRecord::Base.pluralize_table_names = false
-    assert_equal "Firms", ActiveRecord::Base.class_name( "firms" )
-    ActiveRecord::Base.pluralize_table_names = true
-
-    ActiveRecord::Base.table_name_prefix = "test_"
-    assert_equal "Firm", ActiveRecord::Base.class_name( "test_firms" )
-    ActiveRecord::Base.table_name_suffix = "_tests"
-    assert_equal "Firm", ActiveRecord::Base.class_name( "test_firms_tests" )
-    ActiveRecord::Base.table_name_prefix = ""
-    assert_equal "Firm", ActiveRecord::Base.class_name( "firms_tests" )
-    ActiveRecord::Base.table_name_suffix = ""
-    assert_equal "Firm", ActiveRecord::Base.class_name( "firms" )
-  end
-
   def test_null_fields
     assert_nil Topic.find(1).parent_id
     assert_nil Topic.create("title" => "Hey you").parent_id