koa项目中的知识点播放页

大纲

代码

• 目录结构
  
• mock-database.js

  module.exports &＃61; {1: {id: 1,avatar: &＃39;https://static001.geekbang.org/account/avatar/00/0f/52/62/1b3ebed5.jpg&＃39;,name: &＃39;僵尸浩&＃39;,isTop: true,content: &＃39;哈哈哈哈&＃39;,publishDate: &＃39;今天&＃39;,commentNum: 10,praiseNum: 5},2: {id: 2,avatar: &＃39;https://static001.geekbang.org/account/avatar/00/0f/52/62/1b3ebed5.jpg&＃39;,name: &＃39;极客主编&＃39;,isTop: true,content: &＃39;我来送大礼了&＃xff01;&＃xff01;&＃39;,publishDate: &＃39;上周&＃39;,commentNum: 10,praiseNum: 2},3: {id: 3,avatar: &＃39;https://static001.geekbang.org/account/avatar/00/0f/52/62/1b3ebed5.jpg&＃39;,name: &＃39;极客老板&＃39;,isTop: true,content: &＃39;我来发股票了&＃xff01;&＃xff01;&＃xff01;&＃39;,publishDate: &＃39;十年前&＃39;,commentNum: 10,praiseNum: 0}
}


• schema.js

  const { graphql, buildSchema } &＃61; require(&＃39;graphql&＃39;);
const mockDatabase &＃61; require(&＃39;./mock-database&＃39;)const schema &＃61; buildSchema(&＃96;type Comment {id: Intavatar: Stringname: StringisTop: Booleancontent: StringpublishDate: StringcommentNum: IntpraiseNum: Int}type Query {comment: [Comment]}type Mutation {praise(id: Int): Int}
&＃96;)schema.getQueryType().getFields().comment.resolve &＃61; () &＃61;> {return Object.keys(mockDatabase).map(key&＃61;> {return mockDatabase[key];})
}
schema.getMutationType().getFields().praise.resolve &＃61; (args0, { id }) &＃61;> {mockDatabase[id].praiseNum&＃43;&＃43;;return mockDatabase[id].praiseNum
}module.exports &＃61; schema;


• server.js

  const fs &＃61; require(&＃39;fs&＃39;);
const app &＃61; new (require(&＃39;koa&＃39;));
const mount &＃61; require(&＃39;koa-mount&＃39;);
const static &＃61; require(&＃39;koa-static&＃39;);
const graphqlHTTP &＃61; require(&＃39;koa-graphql&＃39;);app.use(// 给koa-graphql传一个graphql的协议文件&＃xff0c;就会自动帮你生成graphql-apimount(&＃39;/api&＃39;, graphqlHTTP({schema: require(&＃39;./schema&＃39;)}))
)app.use(mount(&＃39;/static&＃39;, static(&＃96;${__dirname}/source/static&＃96;))
)app.use(mount(&＃39;/&＃39;, async (ctx) &＃61;> {ctx.status &＃61; 200;ctx.body &＃61; fs.readFileSync(&＃96;${__dirname}/source/index.htm&＃96;, &＃39;utf-8&＃39;)})
)// module.exports &＃61; app;
app.listen(3000)