Merge pull request #3558 from Laravel-Backpack/fix-eager-load-nested-…

…relationships

Fix eager load nested relationships

src/app/Library/CrudPanel/Traits/Read.php

@@ -2,6 +2,8 @@
 
 namespace Backpack\CRUD\app\Library\CrudPanel\Traits;
 
+use Exception;
+
 /**
  * Properties and methods used by the List operation.
  */
@@ -82,8 +84,22 @@ public function autoEagerLoadRelationshipColumns()
     {
         $relationships = $this->getColumnsRelationships();
 
-        if (count($relationships)) {
-            $this->with($relationships);
+        foreach ($relationships as $relation) {
+            if (strpos($relation, '.') !== false) {
+                $parts = explode('.', $relation);
+                $model = $this->model;
+
+                // Iterate over each relation part to find the valid relations without attributes
+                // We should eager load the relation but not the attribute
+                foreach ($parts as $i => $part) {
+                    try {
+                        $model = $model->$part()->getRelated();
+                    } catch (Exception $e) {
+                        $relation = join('.', array_slice($parts, 0, $i));
+                    }
+                }
+            }
+            $this->with($relation);
         }
     }