Module: DatastaxRails::AttributeMethods::Write

Extended by:
ActiveSupport::Concern
Defined in:
lib/datastax_rails/attribute_methods/write.rb

Overview

Methods for writing attributes and maintaining method name safety

Defined Under Namespace

Modules: ClassMethods

Instance Method Summary collapse

Instance Method Details

#write_attribute(attr_name, value) ⇒ Object Also known as: raw_write_attribute

Updates the attribute identified by attr_name with the specified value. Empty strings for fixnum and float columns are turned into nil.


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# File 'lib/datastax_rails/attribute_methods/write.rb', line 33

def write_attribute(attr_name, value)
  attr_name = attr_name.to_s
  attr_name = self.class.primary_key if attr_name == 'id' && self.class.primary_key
  @attributes_cache.delete(attr_name)
  column = column_for_attribute(attr_name)

  # If we're dealing with a binary column, write the data to the cache
  # so we don't attempt to typecast multiple times.
  @attributes_cache[attr_name] = value if column && column.binary?

  if column || @attributes.key?(attr_name)
    @attributes[attr_name] = value
  else
    fail ActiveModel::MissingAttributeError, "can't write unknown attribute `#{attr_name}'"
  end
end