config/initializers/mysqlpls.rb

@@ -0,0 +1,13 @@

                +# see https://github.com/rails/rails/issues/9855#issuecomment-28874587
              

                +# circumvents the default InnoDB limitation for index prefix bytes maximum when using proper 4byte UTF8 (utf8mb4)
              

                +# (for server-side workaround see http://dev.mysql.com/doc/refman/5.7/en/innodb-parameters.html#sysvar_innodb_large_prefix)
              

                +
              

                +require 'active_record/connection_adapters/abstract_mysql_adapter'
              

                +
              

                +module ActiveRecord
              

                +  module ConnectionAdapters
              

                +    class AbstractMysqlAdapter
              

                +      NATIVE_DATABASE_TYPES[:string] = { :name => "varchar", :limit => 191 }
              

                +    end
              

                +  end
              

                +end