laravel/laravel/database/eloquent/relationships/has_one_or_many.php

<?php namespace Laravel\Database\Eloquent\Relationships;

use Laravel\Database\Eloquent\Model;

class Has_One_Or_Many extends Relationship {

	/**
	 * Insert a new record for the association.
	 *
	 * If save is successful, the model will be returned, otherwise false.
	 *
	 * @param  Model|array  $attributes
	 * @return Model|false
	 */
	public function insert($attributes)
	{
		if ($attributes instanceof Model)
		{
			$attributes->set_attribute($this->foreign_key(), $this->base->get_key());
			
			return $attributes->save() ? $attributes : false;
		}
		else
		{
			$attributes[$this->foreign_key()] = $this->base->get_key();

			return $this->model->create($attributes);
		}
	}

	/**
	 * Update a record for the association.
	 *
	 * @param  array  $attributes
	 * @return bool
	 */
	public function update(array $attributes)
	{
		if ($this->model->timestamps())
		{
			$attributes['updated_at'] = new \DateTime;
		}

		return $this->table->update($attributes);
	}

	/**
	 * Set the proper constraints on the relationship table.
	 *
	 * @return void
	 */
	protected function constrain()
	{
		$this->table->where($this->foreign_key(), '=', $this->base->get_key());
	}

	/**
	 * Set the proper constraints on the relationship table for an eager load.
	 *
	 * @param  array  $results
	 * @return void
	 */
	public function eagerly_constrain($results)
	{
		$this->table->where_in($this->foreign_key(), $this->keys($results));
	}

}