Refactoring assoc use in SqlResultProvider. Write SqlCriteria.find() method.

model/SqlCriteria.php

@@ -17,9 +17,20 @@ class SqlCriteria
      */
     private $model;
 
+    /**
+     * @param $model SqlModel
+     */
+    public function __construct($model)
+    {
+        $this->model = $model;
+    }
+
+    /**
+     * @return SqlResultProvider
+     */
     public function find()
     {
-
+        return $this->model->find($this->select, $this->distinct, $this->where, $this->order, $this->limit);
     }
 
     /**