Let's talk about GraphQL implementation based on webman
本篇文章给大家带来了关于GraphQL的相关知识，其中主要跟大家聊一聊有关基于webman的GraphQL实现，感兴趣的朋友下面一起来看一下吧，希望对大家有帮助。
基于PHP的GraphQL由于加载指令（directive）和解析schema的开销较大，性能不是很理想。webman是常驻内存的，所以GraphQL在webman上的性能表现非常不错。
GrahpQL 是基于YiAdmin的一个模块，用于快速创建GraphQL服务，可以开启多个服务，模块内置了多个指令用于快速开发api接口。
调试接口地址：/graphql-dev/api/服务名称
正式接口地址：/graphql-api/服务名称
后台接口管理可以建立接口名称与Query的映射关系，通过接口名称访问以简化前端输入，curl -X POST -d "{\"variables\": VARIABLES}" -H "Content-type:application/json" "HOST/graphql-api/SERVER_NAME?api=接口名称"
零依商城 是基于YiAdmin的uniapp商城系统，Api接口基于GrahpQL进行了重构。
例如有如下 schema
// Type
type Article {
id: Int
category_id: Int
title: String
description: String
created_at: Int
create_time: String @alias(key: "created_at") @date
status: Int
}
type ArticlePagination {
pagination: Pagination
data: [Article]
}通过模型获取记录，支持模型 scope
// Query
"通过文章ID获取文章"
article(
"文章ID"
id: Int! @eq
): Article
@model(name: "\\app\\test\\model\\api\\ArticleModel", scopes: ["published"])
@find支持分页 paginate
articles: ArticlePagination @model(name: "\\app\\test\\model\\api\\ArticleModel", scopes: ["published"]) @paginate(perPage: 15)
查询条件 where
articles(
title: String
): ArticlePagination
@model(name: "\\app\\test\\model\\api\\ArticleModel", scopes: ["published"])
@where(value: { title: ["like", "$title"] })
@paginate(perPage: 15)延迟加载 defer
// Type
type article {
...
category: Category @defer(resolver: "\\app\\test\\loaders\\Cms@getCategoryById", keys: "category_id")
}
type Category {
id: Int
parent_id: Int
title: String
parent: Category @defer(resolver: "\\app\\test\\loaders\\Cms@getCategoryById", keys: "parent_id")
}除此以外，还有包括auth权限管理、resolver自定义处理方法、date时间格式化、validate验证器、water打码脱敏、upper转大写、lower转小写等各种指令。
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