Make error_class work on inner wrapper

Author: coupling

lib/simple_form/wrappers/many.rb

@@ -18,6 +18,7 @@ def initialize(namespace, components, defaults = {})
         @defaults   = defaults
         @defaults[:tag]   = :div unless @defaults.key?(:tag)
         @defaults[:class] = Array(@defaults[:class])
+        @defaults[:error_class] = Array(@defaults[:error_class])
       end
 
       def render(input)
@@ -67,7 +68,10 @@ def html_options(options)
       end
 
       def html_classes(input, options)
-        @defaults[:class].dup
+        classes = []
+        classes << @defaults[:class].dup
+        classes << @defaults[:error_class].dup if input.has_errors?
+        classes
       end
     end
   end