update_migration.rb.erb in statesman-0.8.2

- old
+ new

@@ -1,8 +1,8 @@
 class AddStatesmanTo<%= migration_class_name %> < ActiveRecord::Migration
   def change
     add_column :<%= table_name %>, :to_state, :string
-    add_column :<%= table_name %>, :metadata, :text, default: "{}"
+    add_column :<%= table_name %>, :metadata, :text<%= ", default: \"{}\"" unless mysql? %>
     add_column :<%= table_name %>, :sort_key, :integer
     add_column :<%= table_name %>, :<%= parent_id %>, :integer
     add_column :<%= table_name %>, :created_at, :datetime
     add_column :<%= table_name %>, :updated_at, :datetime
 