Fix single page reference value.

Author: dadish

src/PagesBuffer.php

@@ -55,6 +55,7 @@ public static function add($group, $_ids)
       self::$pageIDs[$group] = [];
     }
     self::$pageIDs[$group] = array_merge(self::$pageIDs[$group], $ids);
+    return $ids;
   }
 
   public static function get($group)

src/Type/Fieldtype/FieldtypePage.php

@@ -38,19 +38,21 @@ public static function field($field)
         'description' => $desc,
         'type' => self::type($field),
         'resolve' => function ($value, $args, $context, $info) use ($field) {
-          $field->derefAsPage = PWFieldtypePage::derefAsPageArray;
           $data = $value->getArray();
           if (isset($data[$field->name])) {
             $data = $data[$field->name];
             if (!empty($data)) {
-              PagesBuffer::add($field->name, $data);
+              $pageIDs = PagesBuffer::add($field->name, $data);
+              if (count($pageIDs)) {
+                $value->data($field->name, $pageIDs);
+              }
             }
           }
           return new Deferred(function () use ($value, $field, $info) {
             $finderOptions = PageArrayType::getFinderOptions($info);
             PagesBuffer::loadPages($field->name, $finderOptions);
             $fieldName = $field->name;
-            $field = \ProcessWire\wire('fields')->get($fieldName);
+            $field->derefAsPage = PWFieldtypePage::derefAsPageArray;
             $value = $value->$fieldName;
             if (!$value instanceof PageArray) {
               return new PageArray();

test/Field/Page/Fieldtype/FieldtypePage/FieldtypePageCaseFourTest.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace ProcessWire\GraphQL\Test\Field\Page\Fieldtype;
+
+/**
+ * Returns multiple values as expected.
+ */
+use \ProcessWire\GraphQL\Test\GraphQLTestCase;
+
+class FieldtypePageCaseFourTest extends GraphQLTestCase {
+
+  const settings = [
+    'login' => 'admin',
+    'legalTemplates' => ['skyscraper', 'architect'],
+    'legalFields' => ['architects'],
+  ];
+
+  public function testValue()
+  {
+  	$query = 'query getSkyscrapers($s: Selector!){
+  		skyscraper (s: $s) {
+  			list {
+  				architects {
+  					list {
+							id,
+  					}
+  				}
+  			}
+  		}
+    }';
+    $variables = [
+      's' => "architects.count>4, limit=5"
+    ];
+    $res = self::execute($query, $variables);
+  	assertGreaterThan(
+  		1,
+  		count($res->data->skyscraper->list[0]->architects->list),
+  		'Returns empty list.'
+  	);
+	}
+}

test/Performance/DBQueryCount.php

@@ -26,7 +26,7 @@ public static function getSettings()
    *
    * @var integer
    */
-  public static $bestQueryCount = 28;
+  public static $bestQueryCount = 29;
 
   /**
    * The query we use to test the performance of the module by counting