Good notes posted by george

Options

See: http://apidock.com/rails/ActionView/Helpers/FormTagHelper/number_field_tag

Documentation for Associations

You are most likely looking for ActiveRecord::Associations::ClassMethods

Information on 'ModelName.transaction'

If you are looking for information about:

ModelName.transaction do
  ...
end

or

transaction do
  ...
end

see ActiveRecord::Transactions::ClassMethods

Information on 'ModelName.transaction'

If you are looking for information about:

ModelName.transaction do
  ...
end

or

transaction do
  ...
end

see ActiveRecord::Transactions::ClassMethods

Required Reading

The details for using layout (such as possible values for the conditions hash) can be found in ActionController::Layout::ClassMethods.