add nova

nova/src/Query/Mixin/BelongsToMany.php

@@ -0,0 +1,52 @@
+<?php
+
+namespace Laravel\Nova\Query\Mixin;
+
+use Illuminate\Database\Eloquent\Relations\MorphToMany;
+
+class BelongsToMany
+{
+    /**
+     * Get default pivot attributes using mixin.
+     *
+     * @return \Closure
+     */
+    public function getDefaultPivotAttributes()
+    {
+        return function () {
+            return collect($this->pivotValues)->mapWithKeys(function ($pivot) {
+                return [$pivot['column'] => $pivot['value']];
+            })->all();
+        };
+    }
+
+    /**
+     * Apply default pivot query using mixin.
+     *
+     * @return \Closure
+     */
+    public function applyDefaultPivotQuery()
+    {
+        return function ($query) {
+            $query->from($this->table);
+
+            if ($this instanceof MorphToMany) {
+                $query->where($this->qualifyPivotColumn($this->morphType), $this->morphClass);
+            }
+
+            foreach ($this->pivotWheres as $arguments) {
+                $query->where(...$arguments);
+            }
+
+            foreach ($this->pivotWhereIns as $arguments) {
+                $query->whereIn(...$arguments);
+            }
+
+            foreach ($this->pivotWhereNulls as $arguments) {
+                $query->whereNull(...$arguments);
+            }
+
+            return $query->where($this->getQualifiedForeignPivotKeyName(), $this->parent->{$this->parentKey});
+        };
+    }
+}