Knex要求安装sqlite3，但我正在使用mysql数据库

问题描述

所以我试图在本地MysqL 数据库上进行查询，但是当我使用knex时，它对我说不需要安装sqlite3驱动器，因为我的数据库是MysqL。

我试图安装sqlite3的驱动器只是为了查看它是否可以解决我的问题，但它只是使与sqlite3相关的其他错误出现了，所以我只删除了sqlite3驱动程序。

我已经有了MysqL的驱动器...贝娄是我的代码。

为什么会发生此错误？据我所知，它不应该问我一个 sqlite3驱动程序，而应该是我在传递knex配置时使用的MysqL。

***我已经尝试使用驱动程序MysqL2，但没有任何改变...

const knex = require('knex');
require('dotenv').config();

const listUsers = async (req,res) => {

    console.log(process.env.DATABASE_PASSWORD);
    //res.send(process.env.DATABASE_USER);

    knex({
        client: 'MysqL',connection: {
            host: process.env.DATABASE_HOST,user: process.env.DATABASE_USER,password: process.env.DATABASE_PASSWORD,database: process.env.DATABASE_NAME
        }
    })

    knex('users')
        .select('*')
        .then(MysqLres => res.send(MysqLres))
        .catch(MysqLerr => res.send(console.log(MysqLerr)))
}

module.exports = {
    listUsers
};

这是我的错误：


Knex: run
$ npm install sqlite3 --save
Cannot find module 'sqlite3'
Require stack:
- D:\coding\Studies\Moblex\backend-MysqL\node_modules\knex\lib\dialects\sqlite3\index.js
- D:\coding\Studies\Moblex\backend-MysqL\node_modules\knex\lib\knex.js
- D:\coding\Studies\Moblex\backend-MysqL\node_modules\knex\lib\index.js
- D:\coding\Studies\Moblex\backend-MysqL\node_modules\knex\knex.js
- D:\coding\Studies\Moblex\backend-MysqL\src\controllers\userController.js
- D:\coding\Studies\Moblex\backend-MysqL\src\routes.js
- D:\coding\Studies\Moblex\backend-MysqL\src\server.js
Error: Cannot find module 'sqlite3'
Require stack:
- D:\coding\Studies\Moblex\backend-MysqL\node_modules\knex\lib\dialects\sqlite3\index.js
- D:\coding\Studies\Moblex\backend-MysqL\node_modules\knex\lib\knex.js
- D:\coding\Studies\Moblex\backend-MysqL\node_modules\knex\lib\index.js
- D:\coding\Studies\Moblex\backend-MysqL\node_modules\knex\knex.js
- D:\coding\Studies\Moblex\backend-MysqL\src\controllers\userController.js
- D:\coding\Studies\Moblex\backend-MysqL\src\routes.js
- D:\coding\Studies\Moblex\backend-MysqL\src\server.js
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:965:15)
    at Function.Module._load (internal/modules/cjs/loader.js:841:27)
    at Module.require (internal/modules/cjs/loader.js:1025:19)
    at require (internal/modules/cjs/helpers.js:72:18)
    at Client_sqlite3._driver (D:\coding\Studies\Moblex\backend-MysqL\node_modules\knex\lib\dialects\sqlite3\index.js:36:12)    
    at Client_sqlite3.initializeDriver (D:\coding\Studies\Moblex\backend-MysqL\node_modules\knex\lib\client.js:232:26)
    at Client_sqlite3.Client (D:\coding\Studies\Moblex\backend-MysqL\node_modules\knex\lib\client.js:70:10)
    at new Client_sqlite3 (D:\coding\Studies\Moblex\backend-MysqL\node_modules\knex\lib\dialects\sqlite3\index.js:18:10)        
    at new Knex (D:\coding\Studies\Moblex\backend-MysqL\node_modules\knex\lib\knex.js:53:28)
    at Knex (D:\coding\Studies\Moblex\backend-MysqL\node_modules\knex\lib\knex.js:17:12)
(node:12648) UnhandledPromiseRejectionWarning: Error: Knex: run
$ npm install sqlite3 --save
Cannot find module 'sqlite3'
Require stack:
- D:\coding\Studies\Moblex\backend-MysqL\node_modules\knex\lib\dialects\sqlite3\index.js
- D:\coding\Studies\Moblex\backend-MysqL\node_modules\knex\lib\knex.js
- D:\coding\Studies\Moblex\backend-MysqL\node_modules\knex\lib\index.js
- D:\coding\Studies\Moblex\backend-MysqL\node_modules\knex\knex.js
- D:\coding\Studies\Moblex\backend-MysqL\src\controllers\userController.js
- D:\coding\Studies\Moblex\backend-MysqL\src\routes.js
- D:\coding\Studies\Moblex\backend-MysqL\src\server.js
    at Client_sqlite3.initializeDriver (D:\coding\Studies\Moblex\backend-MysqL\node_modules\knex\lib\client.js:236:13)
    at Client_sqlite3.Client (D:\coding\Studies\Moblex\backend-MysqL\node_modules\knex\lib\client.js:70:10)
    at new Client_sqlite3 (D:\coding\Studies\Moblex\backend-MysqL\node_modules\knex\lib\dialects\sqlite3\index.js:18:10)        
    at new Knex (D:\coding\Studies\Moblex\backend-MysqL\node_modules\knex\lib\knex.js:53:28)
    at Knex (D:\coding\Studies\Moblex\backend-MysqL\node_modules\knex\lib\knex.js:17:12)
    at listUsers (D:\coding\Studies\Moblex\backend-MysqL\src\controllers\userController.js:19:5)
    at Layer.handle [as handle_request] (D:\coding\Studies\Moblex\backend-MysqL\node_modules\express\lib\router\layer.js:95:5)  
    at next (D:\coding\Studies\Moblex\backend-MysqL\node_modules\express\lib\router\route.js:137:13)
    at Route.dispatch (D:\coding\Studies\Moblex\backend-MysqL\node_modules\express\lib\router\route.js:112:3)
    at Layer.handle [as handle_request] (D:\coding\Studies\Moblex\backend-MysqL\node_modules\express\lib\router\layer.js:95:5)  
(node:12648) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block,or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection,use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:12648) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future,promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

解决方法

所以伙计们，我只是想在应用配置时需要创建一个新的Knex实例，这样就可以了！它之所以要求驱动器sqlite3是因为knex使用sqlite3模型。因此，因为我没有使用自己的配置创建新的Knex实例，所以它使用的是默认设置。

所以这是我的解决方案代码！

|-playbook-dir
   |_myplaybook.yml
   |-action_plugin
     |-prompt_user.py

javascript knex.js node-sqlite3