Module: Orphanage::Methods

Defined in:
lib/orphanage.rb

Overview

self.included

Instance Method Summary collapse

Instance Method Details

#adopt(fks, options = {}) ⇒ Object 



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# File 'lib/orphanage.rb', line 10

def adopt fks, options={}
  # creates a new record in the home table. Returns the created record
  # fks(hash) mapping of foreign keys to values.
  # options(hash): optionally override adoption options set in class

  default_options = self.class.adopt_options
  merged_options = default_options.deep_merge options
  dest = merged_options[:home] # the destination model

  # columns allowed in the destination model
  allowed_cols = dest.column_names
  allowed_cols.delete "id" # obviously this shouldn't carry over

  # timestamps that shouldn't be carried over in the adption
  timestamps_to_remove = merged_options[:update_timestamps]
                          .select{|k, v| v}
                          .map{|k, v| "#{k.to_s}_at" }

  allowed_cols = allowed_cols - timestamps_to_remove

  record = dest.new self
                  .attributes
                  .select {|k, v| allowed_cols.include? k}

  dest.transaction do
    record.update_attributes!(fks)
    self.destroy! if merged_options[:destroy_on_adopt]
  end

  return record

end