add nova

nova/src/Fields/AssociatableRelation.php

@@ -0,0 +1,75 @@
+<?php
+
+namespace Laravel\Nova\Fields;
+
+use Laravel\Nova\Http\Requests\NovaRequest;
+
+trait AssociatableRelation
+{
+    /**
+     * The callback that should be run to associate relations.
+     *
+     * @var (callable(\Laravel\Nova\Http\Requests\NovaRequest, \Illuminate\Database\Eloquent\Builder):(\Illuminate\Database\Eloquent\Builder))|null
+     */
+    public $relatableQueryCallback;
+
+    /**
+     * Determines if the display values should be automatically sorted.
+     *
+     * @var (callable(\Laravel\Nova\Http\Requests\NovaRequest):(bool))|bool
+     */
+    public $reordersOnAssociatableCallback = true;
+
+    /**
+     * Determine if the display values should be automatically sorted when rendering associatable relation.
+     *
+     * @param  \Laravel\Nova\Http\Requests\NovaRequest  $request
+     * @return bool
+     */
+    public function shouldReorderAssociatableValues(NovaRequest $request)
+    {
+        if (is_callable($this->reordersOnAssociatableCallback)) {
+            return call_user_func($this->reordersOnAssociatableCallback, $request);
+        }
+
+        return $this->reordersOnAssociatableCallback;
+    }
+
+    /**
+     * Determine reordering on associatables.
+     *
+     * @return $this
+     */
+    public function dontReorderAssociatables()
+    {
+        $this->reordersOnAssociatableCallback = false;
+
+        return $this;
+    }
+
+    /**
+     * Determine reordering on associatables.
+     *
+     * @param  (callable(\Laravel\Nova\Http\Requests\NovaRequest):bool)|bool  $value
+     * @return $this
+     */
+    public function reorderAssociatables($value = true)
+    {
+        $this->reordersOnAssociatableCallback = $value;
+
+        return $this;
+    }
+
+    /**
+     * Determine the associate relations query.
+     *
+     * @param  (callable(\Laravel\Nova\Http\Requests\NovaRequest, \Illuminate\Database\Eloquent\Builder):(\Illuminate\Database\Eloquent\Builder))|null  $callback
+     * @return $this
+     */
+    public function relatableQueryUsing($callback)
+    {
+        $this->relatableQueryCallback = $callback;
+
+        return $this;
+    }
+}