Get order column name from the model or config instead of resource cu…

…stom static property

README.md

@@ -24,9 +24,8 @@ composer require naxon/nova-field-sortable
 ## Usage
 
 1. Follow the [usage instructions](https://github.com/spatie/eloquent-sortable#usage) on the eloquent-sortable repository to make your model sortable.
-2. Use the `Naxon\NovaFieldSortable\Concerns\SortsIndexEntries` trait in your Nova Resource.
-3. Add a public static property called `$defaultSortField` to your resource, containing your sorting column (I recomment adding it in your main `app/Nova/Resource.php` file).
-4. Add the `Naxon\NovaFieldSortable\Sortable` field to your Nova Resource `fields` method, using a label and your primary key column.
+1. Use the `Naxon\NovaFieldSortable\Concerns\SortsIndexEntries` trait in your Nova Resource.
+1. Add the `Naxon\NovaFieldSortable\Sortable` field to your Nova Resource `fields` method, using a label and your primary key column.
 
 ### Example
 
@@ -46,8 +45,6 @@ class Page extends Resource
 {
     use SortsIndexEntries;
 
-    public static $defaultSortField = 'sort_order';
-
     /**
      * Get the fields displayed by the resource.
      *
@@ -78,4 +75,4 @@ If you discover any security related issues, please email [email protected] inste
 
 ## License
 
-The MIT License (MIT). Please see [License File](LICENSE.md) for more information.
+The MIT License (MIT). Please see [License File](LICENSE.md) for more information.

src/Concerns/SortsIndexEntries.php

@@ -7,21 +7,30 @@
 
 trait SortsIndexEntries
 {
+    private static array $orderColumnCache = [];
+
     /**
-     * Build an "index" query for the given resource.
-     *
-     * @param  \Laravel\Nova\Http\Requests\NovaRequest  $request
-     * @param  \Illuminate\Database\Eloquent\Builder  $query
+     * @param \Laravel\Nova\Http\Requests\NovaRequest $request
+     * @param \Illuminate\Database\Eloquent\Builder $query
      * @return \Illuminate\Database\Eloquent\Builder
      */
-    public static function indexQuery(NovaRequest $request, $query)
+    public static function indexQuery(NovaRequest $request, $query): Builder
     {
         $query->when(empty($request->get('orderBy')), function (Builder $q) {
             $q->getQuery()->orders = [];
 
-            return $q->orderBy(static::$defaultSortField);
+            return $q->orderBy(static::getOrderColumn(static::$model));
         });
 
         return $query;
     }
-}
+
+    private static function getOrderColumn(string $model): string
+    {
+        if (!isset(static::$orderColumnCache[$model])) {
+            static::$orderColumnCache[$model] = app($model)?->sortable['order_column_name'] ?? config('eloquent-sortable.order_column_name', 'order_column');
+        }
+
+        return static::$orderColumnCache[$model];
+    }
+}