update timestamp on soft delete only when its used (#19627)

Author: themsaid

src/Illuminate/Database/Eloquent/SoftDeletes.php

@@ -62,13 +62,17 @@ protected function runSoftDelete()
 
         $time = $this->freshTimestamp();
 
+        $columns = [$this->getDeletedAtColumn() => $this->fromDateTime($time)];
+
         $this->{$this->getDeletedAtColumn()} = $time;
-        $this->{$this->getUpdatedAtColumn()} = $time;
 
-        $query->update([
-            $this->getDeletedAtColumn() => $this->fromDateTime($time),
-            $this->getUpdatedAtColumn() => $this->fromDateTime($time),
-        ]);
+        if ($this->timestamps) {
+            $this->{$this->getUpdatedAtColumn()} = $time;
+
+            $columns[$this->getUpdatedAtColumn()] = $this->fromDateTime($time);
+        }
+
+        $query->update($columns);
     }
 
     /**

tests/Database/DatabaseSoftDeletingTraitTest.php

@@ -57,6 +57,7 @@ class DatabaseSoftDeletingTraitStub
     use \Illuminate\Database\Eloquent\SoftDeletes;
     public $deleted_at;
     public $updated_at;
+    public $timestamps = true;
 
     public function newQuery()
     {