暂存

vendor/illuminate/database/Eloquent/Factories/HasFactory.php

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+<?php
+
+namespace Illuminate\Database\Eloquent\Factories;
+
+use Illuminate\Database\Eloquent\Attributes\UseFactory;
+
+/**
+ * @template TFactory of \Illuminate\Database\Eloquent\Factories\Factory
+ */
+trait HasFactory
+{
+    /**
+     * Get a new factory instance for the model.
+     *
+     * @param  (callable(array<string, mixed>, static|null): array<string, mixed>)|array<string, mixed>|int|null  $count
+     * @param  (callable(array<string, mixed>, static|null): array<string, mixed>)|array<string, mixed>  $state
+     * @return TFactory
+     */
+    public static function factory($count = null, $state = [])
+    {
+        $factory = static::newFactory() ?? Factory::factoryForModel(static::class);
+
+        return $factory
+            ->count(is_numeric($count) ? $count : null)
+            ->state(is_callable($count) || is_array($count) ? $count : $state);
+    }
+
+    /**
+     * Create a new factory instance for the model.
+     *
+     * @return TFactory|null
+     */
+    protected static function newFactory()
+    {
+        if (isset(static::$factory)) {
+            return static::$factory::new();
+        }
+
+        return static::getUseFactoryAttribute() ?? null;
+    }
+
+    /**
+     * Get the factory from the UseFactory class attribute.
+     *
+     * @return TFactory|null
+     */
+    protected static function getUseFactoryAttribute()
+    {
+        $attributes = (new \ReflectionClass(static::class))
+            ->getAttributes(UseFactory::class);
+
+        if ($attributes !== []) {
+            $useFactory = $attributes[0]->newInstance();
+
+            $factory = $useFactory->factoryClass::new();
+
+            $factory->guessModelNamesUsing(fn () => static::class);
+
+            return $factory;
+        }
+    }
+}