Revert "Quote binary strings in Arel"

activemodel/lib/active_model/type/immutable_string.rb

@@ -46,7 +46,6 @@ module ActiveModel
       def serialize(value)
         case value
         when ::Numeric, ::Symbol, ActiveSupport::Duration then value.to_s
-        when ::String then serialize_cast_value(value)
         when true then @true
         when false then @false
         else super
@@ -54,12 +53,6 @@ module ActiveModel
       end
 
       def serialize_cast_value(value) # :nodoc:
-        if value&.encoding == Encoding::BINARY
-          # If we can treat the bytes as UTF-8 without changing them, then use UTF-8 as encoding
-          new_value = value.dup.force_encoding(Encoding::UTF_8)
-          return new_value if new_value.valid_encoding?
-        end
-
         value
       end
 

activemodel/test/cases/type/immutable_string_test.rb

@@ -17,26 +17,6 @@ module ActiveModel
         assert_same s, type.cast(s)
         assert_same s, type.deserialize(s)
       end
-
-      test "leaves validly encoded strings untouched" do
-        s = "string with àccénts".encode(Encoding::ISO_8859_1)
-        type = Type::ImmutableString.new
-        assert_same s, type.serialize(s)
-      end
-
-      test "serializes valid, binary-encoded strings to UTF-8" do
-        s = "string with àccénts".b
-        type = Type::ImmutableString.new
-        serialized = type.serialize(s)
-        assert_equal Encoding::UTF_8, serialized.encoding
-        assert_equal s.bytes, serialized.bytes
-      end
-
-      test "leaves true binary data untouched" do
-        binary_data = "\xEE\x49\xC7".b
-        type = Type::ImmutableString.new
-        assert_same binary_data, type.serialize(binary_data)
-      end
     end
   end
 end

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

@@ -16,10 +16,7 @@ module ActiveRecord
         when false      then quoted_false
         when nil        then "NULL"
         # BigDecimals need to be put in a non-normalized form and quoted.
-        # Additionally, for Ruby 2.7, the string returned by `to_s` is ASCII-8BIT.
-        # We want to avoid that, as that will cause the string to be quoted as
-        # binary. It is safe to force the encoding to US-ASCII.
-        when BigDecimal then value.to_s("F").force_encoding(Encoding::US_ASCII)
+        when BigDecimal then value.to_s("F")
         when Numeric then value.to_s
         when Type::Binary::Data then quoted_binary(value)
         when Type::Time::Value then "'#{quoted_time(value)}'"

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

@@ -6,30 +6,14 @@ module ActiveRecord
   module ConnectionAdapters
     module MySQL
       module Quoting # :nodoc:
-        def quote(value)
-          case value
-          when String
-            if value.encoding == Encoding::BINARY
-              quoted_binary(value)
-            else
-              "'#{quote_string(value.to_s)}'"
-            end
-          else
-            super
-          end
-        end
-
         def cast_bound_value(value)
           case value
           when Rational
             value.to_f.to_s
-          when BigDecimal
-            # For Ruby 2.7, the string returned by `to_s` is ASCII-8BIT.
-            # We want to avoid that, as that will cause the string to be quoted as
-            # binary. It is safe to force the encoding to US-ASCII.
-            value.to_s("F").force_encoding(Encoding::US_ASCII)
           when Numeric
             value.to_s
+          when BigDecimal
+            value.to_s("F")
           when true
             "1"
           when false
@@ -67,11 +51,7 @@ module ActiveRecord
         end
 
         def quoted_binary(value)
-          if value.is_a? String
-            "x'#{value.unpack1("H*")}'"
-          else
-            "x'#{value.hex}'"
-          end
+          "x'#{value.hex}'"
         end
 
         def unquote_identifier(identifier)

activerecord/lib/active_record/connection_adapters/sqlite3/quoting.rb

@@ -4,19 +4,6 @@ module ActiveRecord
   module ConnectionAdapters
     module SQLite3
       module Quoting # :nodoc:
-        def quote(value)
-          case value
-          when String
-            if value.encoding == Encoding::BINARY
-              quoted_binary(value)
-            else
-              "'#{quote_string(value.to_s)}'"
-            end
-          else
-            super
-          end
-        end
-
         def quote_string(s)
           ::SQLite3::Database.quote(s)
         end
@@ -39,11 +26,7 @@ module ActiveRecord
         end
 
         def quoted_binary(value)
-          if value.is_a? String
-            "x'#{value.unpack1("H*")}'"
-          else
-            "x'#{value.hex}'"
-          end
+          "x'#{value.hex}'"
         end
 
         def quoted_true
@@ -79,6 +62,12 @@ module ActiveRecord
           case value
           when BigDecimal
             value.to_f
+          when String
+            if value.encoding == Encoding::ASCII_8BIT
+              super(value.encode(Encoding::UTF_8))
+            else
+              super
+            end
           else
             super
           end

activerecord/test/cases/binary_test.rb

@@ -37,19 +37,4 @@ class BinaryTest < ActiveRecord::TestCase
       assert_equal data, bin.reload.data, "Reloaded data differs from original"
     end
   end
-
-  unless current_adapter?(:PostgreSQLAdapter)
-    def test_does_not_cause_database_warnings
-      original_db_warnings_action = ActiveRecord.db_warnings_action
-      ActiveRecord.db_warnings_action = :raise
-
-      Binary.delete_all
-      binary_data = "\xEE\x49\xC7".b
-      Binary.connection.insert(Arel.sql("INSERT INTO binaries(data) VALUES(?)", binary_data))
-      binary = Binary.first
-      assert_equal binary_data, binary.data
-    ensure
-      ActiveRecord.db_warnings_action = original_db_warnings_action || :ignore
-    end
-  end
 end