关于node.js:ERROR-Please-install-mysql2-package-manually

ERROR: Please install mysql2 package manually

当装置和应用sequelize 呈现这个问题时

1.可能没有装置mysql2 包

解决办法: yarn add mysql2

2.可能是webpack无奈辨认

解决办法: yarn add webpack-node-externals
在webpack.config.js 中 增加:

const nodeExternals = require('webpack-node-externals')
module.exports = { 
...
  externals: [nodeExternals()]
}

即可

webpack 内部扩大(externals)