add nova

nova/src/Http/Requests/PivotFieldDestroyRequest.php

@@ -0,0 +1,98 @@
+<?php
+
+namespace Laravel\Nova\Http\Requests;
+
+use Laravel\Nova\Fields\File;
+use Laravel\Nova\Nova;
+
+class PivotFieldDestroyRequest extends NovaRequest
+{
+    /**
+     * Authorize that the user may attach resources of the given type.
+     *
+     * @return void
+     *
+     * @throws \Symfony\Component\HttpKernel\Exception\HttpException
+     */
+    public function authorizeForAttachment()
+    {
+        if (! $this->newResourceWith($this->findModelOrFail())->authorizedToAttach(
+            $this, $this->findRelatedModel()
+        )) {
+            abort(403);
+        }
+    }
+
+    /**
+     * Get the pivot model for the relationship.
+     *
+     * @return \Illuminate\Database\Eloquent\Model
+     */
+    public function findPivotModel()
+    {
+        $resource = $this->findResourceOrFail();
+
+        abort_unless($resource->hasRelatableField($this, $this->viaRelationship), 404);
+
+        return once(function () use ($resource) {
+            return $this->findRelatedModel()->{
+                $resource->model()->{$this->viaRelationship}()->getPivotAccessor()
+            };
+        });
+    }
+
+    /**
+     * Find the related resource for the operation.
+     *
+     * @param  string|int|null  $resourceId
+     * @return \Laravel\Nova\Resource<\Illuminate\Database\Eloquent\Model>
+     */
+    public function findRelatedResource($resourceId = null)
+    {
+        return Nova::newResourceFromModel(
+            $this->findRelatedModel($resourceId)
+        );
+    }
+
+    /**
+     * Find the related model for the operation.
+     *
+     * @param  string|int|null  $resourceId
+     * @return \Illuminate\Database\Eloquent\Model
+     *
+     * @throws \Illuminate\Database\Eloquent\ModelNotFoundException
+     */
+    public function findRelatedModel($resourceId = null)
+    {
+        $resource = $this->findResourceOrFail();
+
+        abort_unless($resource->hasRelatableField($this, $this->viaRelationship), 404);
+
+        $query = $resource->model()->{$this->viaRelationship}()
+                        ->withoutGlobalScopes();
+
+        if (! is_null($resourceId)) {
+            return $query->lockForUpdate()->findOrFail($resourceId);
+        }
+
+        return once(function () use ($query) {
+            return $query->lockForUpdate()->findOrFail($this->relatedResourceId);
+        });
+    }
+
+    /**
+     * Find the field being deleted or fail if it is not found.
+     *
+     * @return \Laravel\Nova\Fields\Field&\Laravel\Nova\Fields\File
+     *
+     * @throws \Symfony\Component\HttpKernel\Exception\NotFoundHttpException
+     */
+    public function findFieldOrFail()
+    {
+        return $this->findRelatedResource()->resolvePivotFields($this, $this->resource)
+            ->whereInstanceOf(File::class)
+            ->findFieldByAttribute($this->field, function () {
+                abort(404);
+            });
+    }
+}