英文:
Can i create custom query for @find directive with nuwave/lighthouse 6.6?
问题
In Laravel 9.48 / Nuwave/Lighthouse 6.6应用程序中,我需要使用@find指令获取单个行,以添加一些附加字段,这些字段不在数据库中,但是根据published和created_at_formatted计算“on fly” published_label,created_at_formatted基于created_at:
{
article(id:1) {
id
title
text
text_shortly
creator {
id
username
email
status
}
published
published_label
created_at_formatted
created_at
}
}
我尝试创建自定义查询,就像我为@paginate指令创建自定义查询一样,该指令有可能使用自定义解析器和withc命令:
php artisan lighthouse:query Article
新文件app/GraphQL/Queries/Article.php已创建,并修改了GraphQL文件:
extend type Query {
articles(
filterByPublished: Boolean @where(key: "filterByPublished")
filterByTitle: String @where(key: "filterByTitle")
sortedBy: String @where(key: "sortedBy")
page: Int @where(key: "page")
count: Int @where(key: "count")
): [Article!]! @paginate(defaultCount: 10, resolver: "App\\GraphQL\\Queries\\Builders\\CustomArticles@index")
# article(id: ID! @eq): Article @find
article(id: ID! @eq): Article @find(resolver: "App\\GraphQL\\Queries\\Article")
}
命令没有引发任何错误:
php artisan lighthouse:validate-schema
但我的请求返回错误:
"Cannot return null for non-nullable field \"Article.published_label\"
看起来我的自定义查询没有被调用。
阅读文档https://lighthouse-php.com/6/api-reference/directives.html#find,我没有找到任何提到解析器的信息...我该如何处理?
英文:
In laravel 9.48 / nuwave/lighthouse 6.6 app I need getting single row with @find directive to add some additive fields
which I do not have in database ,but calculate “on fly” published_label based on published and created_at_formatted and created_at_formatted
based on created_at :
{
article(id:1) {
id
title
text
text_shortly
creator {
id
username
email
status
}
published
published_label
created_at_formatted
created_at
}
}
I tried to create custom query, like I do with custom query for @paginate( directiver, which has possibility to use custom resolver and withc command
php artisan lighthouse:query Article
new file app/GraphQL/Queries/Article.php was created.
and modified graphql file :
extend type Query {
articles(
filterByPublished: Boolean @where(key: "filterByPublished")
filterByTitle: String @where(key: "filterByTitle")
sortedBy: String @where(key: "sortedBy")
page: Int @where(key: "page")
count: Int @where(key: "count")
): [Article!]! @paginate(defaultCount: 10, resolver: "App\\GraphQL\\Queries\\Builders\\CustomArticles@index")
# article(id: ID! @eq): Article @find
article(id: ID! @eq): Article @find(resolver: "App\\GraphQL\\Queries\\Article")
}
Command did not raise any errors
php artisan lighthouse:validate-schema
and my request returned error :
"Cannot return null for non-nullable field \"Article.published_label\"
looks like my custom query was not called.
Reading docs at https://lighthouse-php.com/6/api-reference/directives.html#find
I did not fond any resolver mentioned here...
How can I make it ?
答案1
得分: 1
以下是翻译好的内容:
- 不需要在这里创建一个自定义的 @find 指令。
我可以看到有两种实现你想要的方式:
- 在你的 Article 模型上创建一个 "published_label" 属性,一种快速而简单的方式:
public function publishedLabel(): Attribute
{
return Attribute::get(fn () => "Published since " . $this->published_at->format(...));
}
- 创建一个专用的解析器,这是一种干净的方式(依我个人看法):
namespace App\GraphQL\Resolvers\Types\Article;
use App\Models\Article;
class PublishedLabel {
public function __invoke(Article $parent): string {
return "Published since " . $parent->published_at->format(...);
}
}
然后在你的 GraphQL 定义中使用它:
type Article {
...
published: Datetime!
published_label: String! @field(resolver: "App\\GraphQL\\Resolvers\\Types\\Article\\PublishedLabel")
}
在这第二种方式中,你甚至可以考虑一些参数,例如 "locale"、"format"(短/长)等,以实现无限的可能性:
type Article {
...
published: Datetime!
published_label(locale: String = "en"): String! @field(resolver: "App\\GraphQL\\Resolvers\\Types\\Article\\PublishedLabel")
}
然后,在你的解析器中使用这些参数:
namespace App\GraphQL\Resolvers\Types\Article;
use App\Models\Article;
class PublishedLabel {
public function __invoke(Article $parent, $args): string {
$locale = $args['locale'];
$publishedAt = $parent->published_at;
return ....;
}
}
英文:
No need to create a custom @find directive here.
I can see two ways to achieve what you want:
- Create a the "published_label" attribute on your Article model, the quick and dirty way :
public function publishedLabel(): Attribute
{
return Attribute::get(fn () => "Published since " . $this->published_at->format(...));
}
- Create a dedicated resolver, the clean way IMHO :
namespace App\GraphQL\Resolvers\Types\Article;
use App\Models\Article;
class PublishedLabel {
public function __invoke(Article $parent): string {
return "Published since " . $parent->published_at->format(...);
}
}
// then in your graphql definition
type Article {
...
published: Datetime!
published_label: String! @field(resolver: "App\\GraphQL\\Resolvers\\Types\\Article\\PublishedLabel")
}
Read more about this here : https://lighthouse-php.com/master/api-reference/directives.html#field
Bonus
With this second way, you can even imagine some arguments, such as "locale", "format" (short/long), ... for endless possibilities
type Article {
...
published: Datetime!
published_label(locale: String = "en"): String! @field(resolver: "App\\GraphQL\\Resolvers\\Types\\Article\\PublishedLabel")
}
namespace App\GraphQL\Resolvers\Types\Article;
use App\Models\Article;
class PublishedLabel {
public function __invoke(Article $parent, $args): string {
$locale = $args['locale'];
$publishedAt = $parent->published_at;
return ....;
}
}
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