教义固定装置不会持续存在，为什么？

Question

我有一小组Doctrine DataFixtures，设置如下：

$ tree -A code/src/AppBundle/DataFixtures/ORM/
code/src/AppBundle/DataFixtures/ORM/
├── LoadCategoryData.php
├── LoadCategoryHasPostData.php
└── LoadPostData.php

当我尝试加载夹具时，请参阅以下输出：

$ docker exec -u www-data -it coding_webserver_1 php bin/console doctrine:fixtures:load -vvv
Careful, database will be purged. Do you want to continue y/N ?y
> purging database
> loading [1] AppBundleDataFixturesORMLoadCategoryData
> loading [2] AppBundleDataFixturesORMLoadPostData
> loading [3] AppBundleDataFixturesORMLoadCategoryHasPostData

[SymfonyComponentDebugExceptionFatalThrowableError]                                                                                                                                                         
Type error: Argument 1 passed to AppBundleEntityCategoryHasPosts::setCategory() must be an instance of AppBundleEntityCategory, null given, called in /var/www/src/AppBundle/DataFixtures/ORM/LoadCategory  
HasPostData.php on line 22

文件LoadCategoryData如下所示：

class LoadCategoryData extends AbstractFixture implements OrderedFixtureInterface
{
public function load(ObjectManager $manager)
{
$category_1 = new Category();
$category_1->setCategoryName('Hot');
$category_1->setCategoryDescription('Hot Topics');
$category_1->setSlug('hot');
$category_1->setActive(true);
$manager->persist($category_1);
$category_2 = new Category();
$category_2->setCategoryName('New');
$category_2->setCategoryDescription('New Topics');
$category_2->setSlug('new');
$category_2->setActive(true);
$manager->persist($category_2);
$manager->flush();
}
public function getOrder()
{
return 1;
}
}

这是LoadPostData文件的内容：

class LoadPostData extends AbstractFixture implements OrderedFixtureInterface
{
public function load(ObjectManager $manager)
{
$faker = FakerFactory::create();
for ($i = 0; $i < 1000; $i++) {
$post = new Post();
$post->setPostTitle($faker->sentence);
$post->setPostContent($faker->paragraph);
$post->setSlug($faker->slug);
$manager->persist($post);
}
$manager->flush();
}
public function getOrder()
{
return 2;
}
}

这是LoadCategoryHasPostData文件的内容：

class LoadCategoryHasPostData extends AbstractFixture implements OrderedFixtureInterface
{
public function load(ObjectManager $manager)
{
for ($i = 0; $i < 2000; $i++) {
$category_id = random_int(1, 2);
$category    = $manager->getRepository('AppBundle:Category')->find($category_id);
$post_id = random_int(1, 2000);
$post    = $manager->getRepository('AppBundle:Post')->find($post_id);
$categoryHasPost = new CategoryHasPosts();
$categoryHasPost->setCategory($category);
$categoryHasPost->setPost($post);
$manager->persist($categoryHasPost);
}
$manager->flush();
}
public function getOrder()
{
return 3;
}
}

我知道为什么这个过程失败了，这是逻辑：以前的实体没有被持久化，这就是我的原因。

为什么Category和Post没有持久和刷新？我在这里缺少什么？

Answer 1

应使用引用在灯具之间共享实体：

class LoadCategoryData extends AbstractFixture implements OrderedFixtureInterface
{
public function load(ObjectManager $manager)
{
$category_1 = new Category();
// …
$manager->persist($category_1);
$this->addReference('category_1', $category_1);
$manager->flush();
}
// …
}

class LoadPostData extends AbstractFixture implements OrderedFixtureInterface
{
public function load(ObjectManager $manager)
{
$faker = FakerFactory::create();
for ($i = 0; $i < 1000; $i++) {
$post = new Post();
$post->setPostTitle($faker->sentence);
$post->setPostContent($faker->paragraph);
$post->setSlug($faker->slug);
$manager->persist($post);
$this->addReference('post_' . $i, $post);
}
$manager->flush();
}
// …
}

class LoadCategoryHasPostData extends AbstractFixture implements OrderedFixtureInterface
{
public function load(ObjectManager $manager)
{
$categoryHasPost = new CategoryHasPosts();
$categoryHasPost->setCategory($this->getReference('category_1'));
$categoryHasPost->setPost($this->getReference('post_1'));
$manager->persist($categoryHasPost);
$manager->flush();
}
// …
}

Answer 2

试试吧

class LoadCategoryHasPostData extends AbstractFixture implements OrderedFixtureInterface {
public function load(ObjectManager $manager)
{
$categories = $manager->getRepository('AppBundle:Category')->findAll();
$posts = $manager->getRepository('AppBundle:Post')->findAll();
for ($i = 0; $i < 2000; $i++) {
$category = $categories[random_int(0, count($categories) - 1)];
$post     = $posts[random_int(0, count($posts) - 1);
$categoryHasPost = new CategoryHasPosts();
$categoryHasPost->setCategory($category);
$categoryHasPost->setPost($post);
$manager->persist($categoryHasPost);
}
$manager->flush();
}
public function getOrder()
{
return 3;
}
}