Extend kohana sprig

gistfile1.php

<?php defined('SYSPATH') or die('No direct script access.');

abstract class Sprig extends Sprig_Core {

	/**
	 * Returns the foreign key of the model, optionally with a table name.
	 *
	 * @param   string  table name, TRUE for the model table
	 * @return  string
	 */
	public function fk($table = NULL)
	{
		$model = explode('_', $this->_model);

		$model = strtolower($model[count($model) - 1]);

		$key = $model.'_'.$this->_primary_key;

		if ($table)
		{
			if ($table === TRUE)
			{
				$table = $this->_table;
			}

			return $table.'.'.$key;
		}

		return $key;
	}

} // End Sprig