class TranslationKey < ActiveRecord::Base
  has_many :key_values
  has_many :translation_values, :through => :key_values
  belongs_to :client
  validates_uniqueness_of :name, :scope => [:client_id], :message => "already exist in another key"

  after_destroy { |record| logger.info( "key #{record.id} was destroyed." ) }
end

class KeyValue < ActiveRecord::Base
  belongs_to :translation_value
  belongs_to :translation_key
  belongs_to :environment
  after_save { logger.info( 'key_value saved!' ) }
end

#translation_keys controller

  def destroy
    @key = TranslationKey.find(params[:id])
    @key.destroy

    destroy_key_values

    respond_to do |format|
      flash[:notice] = 'Key was deleted.'
      format.html { redirect_to(translation_keys_path) }
      format.xml  { head :ok }
    end
  end

  def destroy_key_values
    #destroy all key_value rows that relate to this key but keep the values
    @key.translation_values.each do |value|
      key_value = KeyValue.find_by_translation_key_id_and_translation_value_id(@key.id, value)
      key_value.delete
    end
  end