Skip to_time if the value is a Time instance

This skips calling `#to_time` if the value is a instance of subclass of `Time`, like `ActiveSupport::TimeWithZone`.

1 files changed, 5 insertions, 1 deletions

diff --git a/lib/axlsx/workbook/worksheet/cell.rb b/lib/axlsx/workbook/worksheet/cell.rb
index cd9e1829..3136d0e0 100644
--- a/lib/axlsx/workbook/worksheet/cell.rb
+++ b/lib/axlsx/workbook/worksheet/cell.rb
@@ -452,7 +452,11 @@ module Axlsx
         v
       when :time
         self.style = STYLE_DATE if self.style == 0
-        v.respond_to?(:to_time) ? v.to_time : v
+        if !v.is_a?(Time) && v.respond_to?(:to_time)
+          v.to_time
+        else
+          v
+        end
       when :float
         v.to_f
       when :integer