add nova

nova/src/Fields/HasManyThrough.php

@@ -0,0 +1,95 @@
+<?php
+
+namespace Laravel\Nova\Fields;
+
+use Laravel\Nova\Contracts\ListableField;
+use Laravel\Nova\Contracts\RelatableField;
+use Laravel\Nova\Panel;
+
+/**
+ * @method static static make(mixed $name, string|null $attribute = null, string|null $resource = null)
+ */
+class HasManyThrough extends HasMany implements ListableField, RelatableField
+{
+    use Collapsable;
+
+    /**
+     * The field's component.
+     *
+     * @var string
+     */
+    public $component = 'has-many-through-field';
+
+    /**
+     * The name of the Eloquent "has many through" relationship.
+     *
+     * @var string
+     */
+    public $hasManyThroughRelationship;
+
+    /**
+     * Create a new field.
+     *
+     * @param  string  $name
+     * @param  string|null  $attribute
+     * @param  class-string<\Laravel\Nova\Resource>|null  $resource
+     * @return void
+     */
+    public function __construct($name, $attribute = null, $resource = null)
+    {
+        parent::__construct($name, $attribute, $resource);
+
+        $this->hasManyThroughRelationship = $this->attribute = $attribute ?? ResourceRelationshipGuesser::guessRelation($name);
+    }
+
+    /**
+     * Get the relationship name.
+     *
+     * @return string
+     */
+    public function relationshipName()
+    {
+        return $this->hasManyThroughRelationship;
+    }
+
+    /**
+     * Get the relationship type.
+     *
+     * @return string
+     */
+    public function relationshipType()
+    {
+        return 'hasManyThrough';
+    }
+
+    /**
+     * Make current field behaves as panel.
+     *
+     * @return \Laravel\Nova\Panel
+     */
+    public function asPanel()
+    {
+        return Panel::make($this->name, [$this])
+                    ->withMeta([
+                        'prefixComponent' => true,
+                    ])->withComponent('relationship-panel');
+    }
+
+    /**
+     * Prepare the field for JSON serialization.
+     *
+     * @return array<string, mixed>
+     */
+    public function jsonSerialize(): array
+    {
+        return array_merge([
+            'collapsable' => $this->collapsable,
+            'collapsedByDefault' => $this->collapsedByDefault,
+            'hasManyThroughRelationship' => $this->hasManyThroughRelationship,
+            'relatable' => true,
+            'perPage' => $this->resourceClass::$perPageViaRelationship,
+            'resourceName' => $this->resourceName,
+            'singularLabel' => $this->singularLabel ?? $this->resourceClass::singularLabel(),
+        ], parent::jsonSerialize());
+    }
+}