Apollo 服务器 2.0 不能与 join-monster-graphql-tools-adapter 和 oracle 一起使用

Posted 2023-03-08

【中文标题】Apollo 服务器 2.0 不能与 join-monster-graphql-tools-adapter 和 oracle 一起使用

【英文标题】：Apollo server 2.0 not working with join-monster-graphql-tools-adapter and oracle

【发布时间】：2020-07-07 04:02:03

【问题描述】：

我正在 expressjs 上构建一个 graphql 服务器。下面是代码：

const express = require('express');
const app = express();
const ApolloServer = require('apollo-server-express');

const server = new ApolloServer(schema);
server.applyMiddleware(app, path: '/graphql');

app.listen(4000,()=>console.log(`server started on port $4000`));

这是我的架构：

const typeDefs = `

    input CustomersInput 
        EMAIL_ADDRESS: String
        NAME: String
        HOME_PHONE: String
        SPA_FOLIO_ID: ID
        ALL_CUSTOMER_ID: ID
    

    type Customer 
        ALL_CUSTOMER_ID: ID
        NAME: String
        ALL_CUSTOMER_TYPE: String
        FIRST_NAME: String
    

    type Query 
        customers(input: CustomersInput): [Customer]!
    

    schema 
        query: Query
    
`;

const resolvers = 
    Query: 
        customers(parent, args, ctx, resolveInfo) 
            return joinMonster.default(resolveInfo,ctx, async sql=>
                console.log(sql)
                return knex.raw(sql); 
            );
        ,
    ,


const schema = makeExecutableSchema(
    typeDefs,
    resolvers,
);

joinMonsterAdapt(schema, 
    Query: 
        fields: 
            customers: 
                where: (customerTable,args) => 
                    return escape(`$customerTable.UPPER_FIRST_NAME || ' ' || $customerTable.UPPER_LAST_NAME || ' ' || $customerTable.UPPER_FIRST_NAME like %L`, `%$args.input.NAME.toUpperCase()%`);
                ,
            ,
        
    ,
    Customer: 
        sqlTable: 'ALL_CUSTOMER',
        uniqueKey: 'ALL_CUSTOMER_ID',
    ,
);



module.exports = schema;

当我运行应用程序时，转到http://localhost:4000/graphql，并使用查询：

  customers(input:NAME: "as")
    FIRST_NAME
    ALL_CUSTOMER_ID

  

我回来了：

  "data": 
    "customers": [
      
        "FIRST_NAME": null,
        "ALL_CUSTOMER_ID": "563",

      ,
    ]
  

发生这种情况是因为当我查看 joinmonster 正在生成的 sql 查询时，它只请求客户 ID，如下所示：

SELECT
  "customers"."ALL_CUSTOMER_ID" AS "ALL_CUSTOMER_ID"
FROM ALL_CUSTOMER "customers"
WHERE "customers".UPPER_FIRST_NAME || ' ' || "customers".UPPER_LAST_NAME || ' ' || "customers".UPPER_FIRST_NAME like '%AS%'

当我运行完全相同的代码但使用 express-graphql 时，

const expressGraphQL = require('express-graphql');

app.use('/graphql', expressGraphQL(
        schema,
        graphiql: true
    ))

这是连接怪物正在生成的查询：

SELECT
  "customers"."ALL_CUSTOMER_ID" AS "ALL_CUSTOMER_ID",
  "customers"."FIRST_NAME" AS "FIRST_NAME"
FROM ALL_CUSTOMER "customers"
WHERE "customers".UPPER_FIRST_NAME || ' ' || "customers".UPPER_LAST_NAME || ' ' || "customers".UPPER_FIRST_NAME like '%AS%'

一切都按预期进行。我错过了什么吗？

【参考方案1】：

您找到解决此问题的方法了吗？除了我的类型中的 id 之外，我看到返回空值的情况相同。我使用的是express-graphql，一切正常，就像你描述的那样。当我将其从apollo-server-express 换成ApolloServer 时，我可以看到架构似乎可以正常加载并显示在 GraphQL 操场上，但是 sql 查询没有正常执行，导致到处都出现空值。

在最新版本的join-monster (3.0, unreleased) 中，他们已将所有join-monster 特定语法移至extensions 属性中。我认为这可能会解决问题，如果它是添加到导致它的类型的额外非标准 GraphQL 属性。

const User = new GraphQLObjectType(
  name: 'User',
  extensions: 
    joinMonster: 
      sqlTable: 'accounts', // the SQL table for this object type is called "accounts"
      uniqueKey: 'id' // id is different for every row
    
  ,
  fields: () => (
    /*...*/
  )
)