Module: AutomaticRecord::AutoCreate::ClassMethods

Defined in:
lib/automatic_record/auto_create.rb

Instance Method Summary collapse

Instance Method Details

#auto_create(assoc, default_attrs_or_block = {}) ⇒ Object

Specifies that the given association should be created automaticaly whenever it is accessed, if it does not already exist. This method should only be used on associations that are defined as either :belongs_to or :has_one.

Example

class User < ActiveRecord::Base
  has_one :preference
  auto_create :preference
end

Options

Pass a list of default attributes:

auto_create :preference, :language => 'en', :notifications => true

Pass a block to be used for object creation:

auto_create :preference, ->(user){ user.create_preference(:language => 'en', :notifications => true) }



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# File 'lib/automatic_record/auto_create.rb', line 30

def auto_create(assoc, default_attrs_or_block={})        
  reflection = reflect_on_association(assoc)
  if reflection.nil?
    raise AutomaticRecord::Error::MissingAssociation.new(assoc)
  elsif !(reflection.has_one? || reflection.belongs_to?)
    raise AutomaticRecord::Error::InvalidAssociation.new(assoc)
  else
    define_method(assoc) do |force_reload=false|
      return get_or_auto_create_assoc(assoc, force_reload, default_attrs_or_block)
    end
  end
end