From 16a816a1639d0bdd305d62a59740ee415b700597 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Juli=C3=A1n=20Guti=C3=A9rrez?= <juliangut@gmail.com>
Date: Wed, 22 Mar 2017 23:36:06 +0100
Subject: [PATCH] discover dql alias

---
 src/SpecificationRepositoryTrait.php | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/src/SpecificationRepositoryTrait.php b/src/SpecificationRepositoryTrait.php
index 2f2c573..1724527 100644
--- a/src/SpecificationRepositoryTrait.php
+++ b/src/SpecificationRepositoryTrait.php
@@ -15,7 +15,7 @@ trait SpecificationRepositoryTrait
     /**
      * @var string
      */
-    protected $dqlAlias = 'e';
+    protected $dqlAlias;
 
     /**
      * @see SpecificationAwareInterface::match()
@@ -36,7 +36,7 @@ public function match(SpecificationInterface $specification, ModifierInterface $
             ));
         }
 
-        $queryBuilder = $this->createQueryBuilder($this->dqlAlias);
+        $queryBuilder = $this->createQueryBuilder($this->getDqlAlias());
         $this->modifyQueryBuilder($queryBuilder, $specification);
 
         return $this->modifyQuery($queryBuilder, $modifier);
@@ -53,7 +53,7 @@ public function match(SpecificationInterface $specification, ModifierInterface $
      */
     private function modifyQueryBuilder(QueryBuilder $queryBuilder, SpecificationInterface $specification)
     {
-        $condition = $specification->modify($queryBuilder, $this->dqlAlias);
+        $condition = $specification->modify($queryBuilder, $this->getDqlAlias());
 
         if (empty($condition)) {
             return;
@@ -80,4 +80,18 @@ private function modifyQuery(QueryBuilder $queryBuilder, ModifierInterface $modi
 
         return $query;
     }
+
+    /**
+     * Get DQL entity alias.
+     *
+     * @return string
+     */
+    protected function getDqlAlias()
+    {
+        if ($this->dqlAlias === null) {
+            $this->dqlAlias = strtoupper($this->getEntityName()[0]);
+        }
+
+        return $this->dqlAlias;
+    }
 }