Set columnName to the processed property value (#180)

* Add test for descending default sort

Author: axelitus

src/Sort.php

@@ -29,7 +29,7 @@ public function __construct(string $property, $sortClass, ?string $columnName =
 
         $this->defaultDirection = static::parsePropertyDirection($property);
 
-        $this->columnName = $columnName ?? $property;
+        $this->columnName = $columnName ?? $this->property;
     }
 
     public static function parsePropertyDirection(string $property): string

tests/SortTest.php

@@ -120,6 +120,18 @@ public function it_uses_default_sort_parameter()
         $this->assertSortedAscending($sortedModels, 'name');
     }
 
+    /** @test */
+    public function it_uses_default_descending_sort_parameter()
+    {
+        $sortedModels = QueryBuilder::for(TestModel::class, new Request())
+            ->allowedSorts('-name')
+            ->defaultSort('-name')
+            ->get();
+
+        $this->assertQueryExecuted('select * from "test_models" order by "name" desc');
+        $this->assertSortedDescending($sortedModels, 'name');
+    }
+
     /** @test */
     public function it_can_allow_multiple_sort_parameters()
     {