我是 GraphQL 的絕對初學者。如果問題是業余的，請道歉。我正在編寫這個 graphQL 端點，它將按姓名過濾人員。效果很好，但我希望能夠按姓名、年齡、電話號碼等多個參數過濾或者使用參數的組合來搜索..我目前的程序：var express = require("express");var express_graphql = require("express-graphql");var { buildSchema } = require("graphql");var Sequelize = require("sequelize")var db = new Sequelize(  "users",  "root",  "pass",  {    host: "localhost",    dialect: "mysql"  });var calls = db.define(  "calls",  {    person_id: {      type: Sequelize.INTEGER,      allowNull: false,      primaryKey: true    },    name: {      type: Sequelize.STRING,      allowNull: false    },    age: {      type: Sequelize.INTEGER,      allowNull: false    },    address: {      type: Sequelize.STRING,      allowNull: false    },    company: {      type: Sequelize.String,      allowNull: false    },    email: {      type: Sequelize.STRING,      allowNull: false    }  },  {    tableName: "person"  });// Construct a schema, using GraphQL schema languagevar schema = buildSchema(`  type Query {    Person(person_id: Integer!): [Person]  }  type Person {    person_id: Integer    name: String    age: Integer    address: String    company: String    email: String   }`);var getperson = function(args) {  if (args.person_id) {    var p_name = args.person_id;    return calls.findAll({      where: {        name: p_name      }    });  }};// The root provides a resolver function for each API endpointvar root = {  person: getperson};var app = express();app.use(  "/graphql",  express_graphql({    schema: schema,    rootValue: root,    graphiql: true  }));app.listen(4000);console.log("Running a GraphQL API server at http://localhost:4000/graphql");嘗試這樣做： type Query {    Person(person_id: Integer!): [Person]    Person(name: String!): [Person]  }但它說 Person 只能定義一次。