[5.x] Ensure no queries are run when entries field has no values

src/Fieldtypes/Entries.php

@@ -18,6 +18,7 @@
 use Statamic\Facades\User;
 use Statamic\Http\Resources\CP\Entries\EntriesFieldtypeEntries;
 use Statamic\Http\Resources\CP\Entries\EntriesFieldtypeEntry as EntryResource;
+use Statamic\Query\EmptyQueryBuilder;
 use Statamic\Query\OrderedQueryBuilder;
 use Statamic\Query\Scopes\Filter;
 use Statamic\Query\Scopes\Filters\Concerns\QueriesFilters;
@@ -337,6 +338,10 @@ protected function collect($value)
 
     private function queryBuilder($values)
     {
+        if (! $values) {
+            return new StatusQueryBuilder(new EmptyQueryBuilder());
+        }
+
         $site = Site::current()->handle();
         if (($parent = $this->field()->parent()) && $parent instanceof Localization) {
             $site = $parent->locale();

src/Query/EmptyQueryBuilder.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace Statamic\Query;
+
+class EmptyQueryBuilder extends IteratorBuilder
+{
+    protected function getBaseItems()
+    {
+        return collect([]);
+    }
+
+    public function whereStatus($status)
+    {
+        return $this;
+    }
+}

tests/Fieldtypes/EntriesTest.php

@@ -82,6 +82,11 @@ public function it_augments_to_a_query_builder_when_theres_no_value()
 
         $this->assertInstanceOf(Builder::class, $augmented);
         $this->assertCount(0, $augmented->get());
+
+        $augmented = $this->fieldtype()->augment([]);
+
+        $this->assertInstanceOf(Builder::class, $augmented);
+        $this->assertCount(0, $augmented->get());
     }
 
     #[Test]