From 058835304480850b29954c2113b594b263114631 Mon Sep 17 00:00:00 2001
From: Boris Cerati <contact@boris-web.fr>
Date: Thu, 24 Aug 2017 22:33:27 +0200
Subject: [PATCH] Throw an exception when no links is configured to fetch
 entities

---
 src/AbstractMySqlGateway.php | 27 ++++++++++++++++++++-------
 1 file changed, 20 insertions(+), 7 deletions(-)

diff --git a/src/AbstractMySqlGateway.php b/src/AbstractMySqlGateway.php
index fd13e27..192d8f6 100644
--- a/src/AbstractMySqlGateway.php
+++ b/src/AbstractMySqlGateway.php
@@ -58,12 +58,14 @@ public function getLinks($method = self::ALL)
     {
         $links = [];
 
-        foreach ($this->links as $key => $pool) {
-            if ($method & $key) {
-                /** @var Link $link */
-                foreach ($pool as $link) {
-                    if ($link->runFilters()) {
-                        $links[] = $link->getLink();
+        if (is_array($this->links)) {
+            foreach ($this->links as $key => $pool) {
+                if ($method & $key) {
+                    /** @var Link $link */
+                    foreach ($pool as $link) {
+                        if ($link->runFilters()) {
+                            $links[] = $link->getLink();
+                        }
                     }
                 }
             }
@@ -80,7 +82,13 @@ public function fetchOne($key): EntityInterface
     {
         $class = $this->getEntityClass() ? $this->getEntityClass() : $this->getDefaultEntityClass();
 
-        foreach ($this->getLinks(self::FETCH_ONE) as $link) {
+        $links = $this->getLinks(self::FETCH_ONE);
+
+        if (!$links) {
+            throw new MySqlGatewayException('No link found to fetch one entity');
+        }
+
+        foreach ($links as $link) {
             /** @var EntityInterface $entity */
             $entity = new $class;
 
@@ -276,6 +284,11 @@ public function fetchAll(ResultSetDescriptorInterface $descriptor): ResultSetInt
     {
 
         $links = $this->getLinks(self::READ);
+
+        if (!$links) {
+            throw new MySqlGatewayException('No link found to fetch entities');
+        }
+
         $query = new Select(new Quoter('`', '`'));
         $this->hydrateQuery($query, $descriptor);