1 files changed, 43 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/relation/query_attribute.rb b/activerecord/lib/active_record/relation/query_attribute.rb
new file mode 100644
index 0000000000..f64bd30d38
--- /dev/null
+++ b/activerecord/lib/active_record/relation/query_attribute.rb
@@ -0,0 +1,43 @@
+# frozen_string_literal: true
+
+require "active_model/attribute"
+
+module ActiveRecord
+  class Relation
+    class QueryAttribute < ActiveModel::Attribute # :nodoc:
+      def type_cast(value)
+        value
+      end
+
+      def value_for_database
+        @value_for_database ||= super
+      end
+
+      def with_cast_value(value)
+        QueryAttribute.new(name, value, type)
+      end
+
+      def nil?
+        !value_before_type_cast.is_a?(StatementCache::Substitute) &&
+          (value_before_type_cast.nil? || value_for_database.nil?)
+      end
+
+      def boundable?
+        return @_boundable if defined?(@_boundable)
+        nil?
+        @_boundable = true
+      rescue ::RangeError
+        @_boundable = false
+      end
+
+      def infinity?
+        _infinity?(value_before_type_cast) || boundable? && _infinity?(value_for_database)
+      end
+
+      private
+        def _infinity?(value)
+          value.respond_to?(:infinite?) && value.infinite?
+        end
+    end
+  end
+end