Added Eloquent 2.

Signed-off-by: Taylor Otwell <taylorotwell@gmail.com>

laravel/database/eloquent/relationships/relationship.php

@@ -0,0 +1,78 @@
+<?php namespace Laravel\Database\Eloquent\Relationships; use Eloquent\Model, Eloquent\Query;
+
+abstract class Relationship extends Query {
+
+	/**
+	 * The base model for the relationship.
+	 *
+	 * @var Model
+	 */
+	protected $base;
+
+	/**
+	 * Create a new has one or many association instance.
+	 *
+	 * @param  Model   $model
+	 * @param  string  $associated
+	 * @param  string  $foreign
+	 * @return void
+	 */
+	public function __construct($model, $associated, $foreign)
+	{
+		$this->foreign = $foreign;
+
+		// We will go ahead and set the model and associated instances on the relationship
+		// to match the relationship targets passed in from the model. These will allow
+		// us to gather more inforamtion on the relationship.
+		$this->model = ($associated instanceof Model) ? $associated : new $associated;
+
+		if ($model instanceof Model)
+		{
+			$this->base = $model;
+		}
+		else
+		{
+			$this->base = new $model;
+		}
+
+		// Next we'll set the fluent query builder for the relationship and constrain
+		// the query such that it only returns the models that are appropriate for
+		// the relationship, typically by setting the foreign key.
+		$this->table = $this->query();
+
+		$this->constrain();
+	}
+
+	/**
+	 * Get the foreign key name for the given model.
+	 *
+	 * @param  string  $model
+	 * @param  string  $foreign
+	 * @return string
+	 */
+	public static function foreign($model, $foreign = null)
+	{
+		if ( ! is_null($foreign)) return $foreign;
+
+		// If the model is an object, we will simply get the class of the object and
+		// then take the basename, which is simply the object name minus the
+		// namespace, and we'll append "_id" to the name.
+		if (is_object($model))
+		{
+			$model = get_class($model);
+		}
+
+		return strtolower(basename($model).'_id');
+	}
+
+	/**
+	 * Get the foreign key for the relationship.
+	 *
+	 * @return string
+	 */
+	protected function foreign_key()
+	{
+		return Relationship::foreign($this->base, $this->foreign);
+	}
+
+}