1 files changed, 3 insertions, 3 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
index 553bce983a..0be4b5cb19 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
@@ -68,8 +68,7 @@ module ActiveRecord
       # Appends a primary key definition to the table definition.
       # Can be called multiple times, but this is probably not a good idea.
       def primary_key(name, type = :primary_key, options = {})
-        options[:primary_key] = true
-        column(name, type, options)
+        column(name, type, options.merge(:primary_key => true))
       end
 
       # Returns a ColumnDefinition for the column with name +name+.
@@ -261,7 +260,7 @@ module ActiveRecord
         args.each do |col|
           column("#{col}_id", :integer, options)
           column("#{col}_type", :string, polymorphic.is_a?(Hash) ? polymorphic : options) if polymorphic
-          index(polymorphic ? %w(id type).map { |t| "#{col}_#{t}" } : "#{col}_id", index_options.is_a?(Hash) ? index_options : nil) if index_options
+          index(polymorphic ? %w(id type).map { |t| "#{col}_#{t}" } : "#{col}_id", index_options.is_a?(Hash) ? index_options : {}) if index_options
         end
       end
       alias :belongs_to :references
@@ -273,6 +272,7 @@ module ActiveRecord
         end
 
         column.limit       = limit
+        column.array       = options[:array] if column.respond_to?(:array)
         column.precision   = options[:precision]
         column.scale       = options[:scale]
         column.default     = options[:default]