[GraphQL] Use GraphQL's List Type for Collections

GraphQL列表类型详解

最新推荐文章于 2025-07-27 19:43:56 发布

转载最新推荐文章于 2025-07-27 19:43:56 发布 · 122 阅读

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本文介绍如何使用GraphQL Schema定义视频集合，通过示例演示了如何指定列表类型并查询多个项目。

In order to handle collections of items in a GraphQL Schema, GraphQL has a List Type. In this video, we’ll learn the syntax for specifying a List of items in a GraphQL Schema.

Quey list of videos:

const { graphql, buildSchema } = require('graphql');

const schema = buildSchema(`
    type Video {
        id: ID,
        title: String,
        duration: Int,
        watched: Boolean
    }
    
    type Query {
        video: Video,
        videos: [Video]
    }
    
    type Schema{
        query: Query
    }
`);

const videos = [
    {
        id       : '1',
        title    : 'react',
        duration : 180,
        watched  : true
    },
    {
        id       : '2',
        title    : 'relay',
        duration : 230,
        watched  : false
    }
];

const resolvers = {
    video : () => ({
        id       : '1',
        title    : 'bar',
        duration : 180,
        watched  : true
    }),
    videos: () => videos
};

const query = `
    query myFirstQuery {
        videos {
            id,
            title,
            duration,
            watched
        }
    }
`;

graphql(schema, query, resolvers)
.then((result) => console.log(JSON.stringify(result, null, 2)))
.catch(console.error)