1 files changed, 53 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/bit.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/bit.rb
new file mode 100644
index 0000000000..e9a79526f9
--- /dev/null
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/bit.rb
@@ -0,0 +1,53 @@
+# frozen_string_literal: true
+
+module ActiveRecord
+  module ConnectionAdapters
+    module PostgreSQL
+      module OID # :nodoc:
+        class Bit < Type::Value # :nodoc:
+          def type
+            :bit
+          end
+
+          def cast_value(value)
+            if ::String === value
+              case value
+              when /^0x/i
+                value[2..-1].hex.to_s(2) # Hexadecimal notation
+              else
+                value                    # Bit-string notation
+              end
+            else
+              value.to_s
+            end
+          end
+
+          def serialize(value)
+            Data.new(super) if value
+          end
+
+          class Data
+            def initialize(value)
+              @value = value
+            end
+
+            def to_s
+              value
+            end
+
+            def binary?
+              /\A[01]*\Z/.match?(value)
+            end
+
+            def hex?
+              /\A[0-9A-F]*\Z/i.match?(value)
+            end
+
+            private
+              attr_reader :value
+          end
+        end
+      end
+    end
+  end
+end