网站 express-graphql - 其他笔记

const express = require("express");

const graphqlhttp = require("express-graphql"); // npm i express-graphql graphql
const graphqlschema = require("./schema/default.js");

const app = express();
app.use("/graphql", graphqlhttp){ // http://localhost:3000/graphql
  schema: graphqlschema,
  graphiql: true,
}

// schema/default.js 文件
const DB = require("./model/db.js");
const {
  GraphQLObjectType,
  GraphQLString,
  GraphQLList,
  GraphQLSchema
} = require("graphql");
const CustomSchema = new GraphQLObjectType({
  name: "custom",
  fields: {
    _id: { type: GraphQLString },
    title: { type: GraphQLString }
  }
})
const RootSchema = new GraphQLObjectType({
  name: "root",
  fields: {
    findOne: {
      type: CustomSchema,
      args: { id: { type: GraphQLString } },
      async resolve(parent, args){
        var id = args.id;
        var list = await DB.find("custom", { "_id": DB.getobjectId(id)});
        return list[0];
      }
    },
    findAll: {
      type: GraphQLList(CustomSchema),
      async resolve(parent, args){
        var list = await DB.find("custom", {});
        return list;
      }
    }
  }
})
module.exports = new GraphQLSchema({ query: RootSchema })