module DatastaxRails::AttributeAssignment

Model.new expects that a hash of attributes will be passed in and expects them to be set on the new instance. This module takes care of that while also delegating nested attribute assignment to the respective models.

Public Instance Methods

assign_attributes(new_attributes) click to toggle source

Allows you to set all the attributes by passing in a hash of attributes with keys matching the attribute names (which again matches the column names).

If the passed hash responds to permitted? method and the return value of this method is false an ActiveModel::ForbiddenAttributesError exception is raised. XXX: Is the above statement still true?

# File lib/datastax_rails/attribute_assignment.rb, line 18
def assign_attributes(new_attributes)
  return if new_attributes.blank?

  attributes = new_attributes.stringify_keys
  nested_parameter_attributes = []

  attributes = sanitize_for_mass_assignment(attributes)

  attributes.each do |k, v|
    if v.is_a?(Hash)
      nested_parameter_attributes << [k, v]
    else
      _assign_attribute(k, v)
    end
  end

  assign_nested_parameter_attributes(nested_parameter_attributes) unless nested_parameter_attributes.empty?
end
Also aliased as: attributes=
attributes=(new_attributes)
Alias for: assign_attributes

Private Instance Methods

_assign_attribute(k, v) click to toggle source
# File lib/datastax_rails/attribute_assignment.rb, line 40
def _assign_attribute(k, v)
  public_send("#{k}=", v)
rescue NoMethodError
  if respond_to?("#{k}=")
    raise
  else
    raise UnknownAttributeError, "unknown attribute: #{k}"
  end
end
assign_nested_parameter_attributes(pairs) click to toggle source

Assign any deferred nested attributes after the base attributes have been set.

# File lib/datastax_rails/attribute_assignment.rb, line 51
def assign_nested_parameter_attributes(pairs)
  pairs.each { |k, v| _assign_attribute(k, v) }
end