Generate insert sql using ActiveRecord(Rails 4)

gistfile1.rb

record = User.new(username: 'ryan', email: 'ryan@hua.li')

record.class.arel_table.create_insert.tap do |im|
  im.insert(record.send(:arel_attributes_with_values_for_create, record.attribute_names)) 
end.to_sql

For reference if anyone else stumbles into this

For rails 5.2
I copied this from https://github.com/IFTTT/polo/pull/54/files

def generate_insert_sql_for_model(record)
  values = record.send(:attributes_with_values_for_create, record.class.column_names)
  model = record.class
  substitutes_and_binds = model.send(:_substitute_values, values)

  insert_manager = model.arel_table.create_insert
  insert_manager.insert substitutes_and_binds

  model.connection.unprepared_statement do
    model.connection.to_sql(insert_manager)
  end
end