Remove deprecated #migration_keys

activerecord/CHANGELOG.md

@@ -1,3 +1,7 @@
+*   Remove deprecated `#migration_keys`.
+
+    *Ryuta Kamizono*
+
 *   Automatically guess the inverse associations for STI.
 
     *Yuichiro Kaneko*

activerecord/lib/active_record/connection_adapters/abstract/schema_dumper.rb

@@ -22,12 +22,6 @@ module ActiveRecord
         spec
       end
 
-      # Lists the valid migration options
-      def migration_keys # :nodoc:
-        column_options_keys
-      end
-      deprecate :migration_keys
-
       private
         def prepare_column_options(column)
           spec = {}

activerecord/lib/active_record/connection_adapters/mysql/schema_dumper.rb

@@ -4,10 +4,6 @@ module ActiveRecord
   module ConnectionAdapters
     module MySQL
       module ColumnDumper # :nodoc:
-        def migration_keys
-          super + [:unsigned]
-        end
-
         private
           def prepare_column_options(column)
             spec = super

activerecord/lib/active_record/connection_adapters/postgresql/schema_dumper.rb

@@ -4,11 +4,6 @@ module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
       module ColumnDumper # :nodoc:
-        # Adds +:array+ as a valid migration key
-        def migration_keys
-          super + [:array]
-        end
-
         private
           def prepare_column_options(column)
             spec = super

activerecord/test/cases/migration_test.rb

@@ -1112,10 +1112,6 @@ class CopyMigrationsTest < ActiveRecord::TestCase
     assert_deprecated { ActiveRecord::Base.connection.initialize_internal_metadata_table }
   end
 
-  def test_deprecate_migration_keys
-    assert_deprecated { ActiveRecord::Base.connection.migration_keys }
-  end
-
   def test_deprecate_supports_migrations
     assert_deprecated { ActiveRecord::Base.connection.supports_migrations? }
   end