lib/rails_erd/domain/attribute.rb in rails-erd-1.7.0 vs lib/rails_erd/domain/attribute.rb in rails-erd-1.7.1

@@ -117,10 +117,10 @@
       # <tt>:string, :limit => 255</tt>:: string
       # <tt>:string, :limit => 128</tt>:: string (128)
       # <tt>:decimal, :precision => 5, :scale => 2/tt>:: decimal (5,2)
       # <tt>:boolean, :null => false</tt>:: boolean *
       def type_description
-        type.to_s.tap do |desc|
+        type.to_s.dup.tap do |desc|
           desc << " #{limit_description}" if limit_description
           desc << " ∗" if mandatory? && !primary_key? # Add a hair space + low asterisk (Unicode characters)
           desc << " U" if unique? && !primary_key? && !foreign_key? # Add U if unique but non-key
           desc << " PK" if primary_key?
           desc << " FK" if foreign_key?