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[英]Type 'Promise<void>' is missing the following properties from type
[英]Type 'Promise<ConnectionPool> & void' is missing the following properties from type 'ConnectionPool'
我正在尝试建立连接并使用 mssql package 返回池。
const sqlConfig = {
user: process.env.DB_USER,
password: process.env.DB_PASS,
database: process.env.DB_CATALOG,
server: process.env.SERVER_HOST
}
export async function connect(){
try{
const pool = await sql.connect(sqlConfig)
return pool
}catch(err){
throw err
}
}
但是,当返回池时,我收到以下 lint 错误: Type 'Promise<ConnectionPool> & void' is missing the following properties from type 'ConnectionPool': connected, connecting, healthy, driver, and 26 more.
我应该如何重写代码以将池作为 ConnectionPool 而不是 Promise<ConnectionPool> & void 返回?
作为参考,这里是完整的代码:
import sql, { ConnectionPool } from "mssql"
require('dotenv').config()
const sqlConfig = {
user: process.env.DB_USER,
password: process.env.DB_PASS,
database: process.env.DB_CATALOG,
server: process.env.SERVER_HOST
}
export async function connect():Promise<ConnectionPool>{
try{
const pool = await sql.connect(sqlConfig)
return pool
}catch(err){
throw err
}
}
我尝试将变量转换为 ConnectionPool 并显式写入预期的返回值,如下所示:
export async function connect():Promise<ConnectionPool>{
try{
const pool = await sql.connect(sqlConfig)
return pool as ConnectionPool
}catch(err){
throw err
}
}
我还尝试向来自https://github.com/tediousjs/node-mssql/issues/1063的 @types/mssql package 添加重载,尽管这是一篇较旧的帖子。
您正在等待 promise 将返回值视为 ConnectionPool object 而不是 promise。
如果您希望连接返回连接池,请将返回类型更改为 ConnectionPool,如果您仍希望它返回 promise,请删除 await,如下所示,并使用 await 调用您的连接 function
export async function connect():Promise<ConnectionPool>{
return sql.connect(sqlConfig);
}catch(err){
throw err
}
}
然后用await connect()
或调用它
connect().then( (pool ) => {
// Do something with pool here
}
我会建议 the.then 而不是 await
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