remove Date cast extension, unneeded because datepicker value is alwa…

…ys converted with condition_value_for_datetime

CHANGELOG

@@ -2,6 +2,7 @@
 
 = 3.5.x
 - Load chosen on turbolinks:load event
+- Fix association.blank? when associated_limit=0 and includes=nil
 
 = 3.5.1
 - Fix set false options for date picker

lib/active_scaffold/helpers/list_column_helpers.rb

@@ -253,7 +253,8 @@ def cache_association(association, column, size)
           # load at least one record more, is needed to display '...'
           association.target = association.reader.limit(column.associated_limit + 1).select(column.select_associated_columns || "#{association.klass.quoted_table_name}.*").to_a
         elsif @cache_associations
-          association.target = []
+          # set array with at least one element if size > 0, so blank? or present? works, saving [nil] may cause exceptions
+          association.target = size.to_i.zero? ? [] : [association.klass.new]
         end
       end