node.js - serverless webpack 配置，手动添加目录

Question

我正在运行以下代码，该代码无法工作，因为当我上传到亚马逊时它找不到模型文件夹。

exports.setModels = function(connection,modelPath){
  //Import all the known models for the project.

  //Proof of Stage being set.
  console.log("stage for models="+stage);

  const fs = require('fs');
  const dir = modelPath;

  var models = {};

  //@JA - Wait until this function finishes ~ hence readdirSync vs regular readdir which is async
  fs.readdirSync(dir).forEach(file => {
    console.log("file="+file);
    //Split the .js part of the filename
    var arr = file.split(".");
    var name = arr[0].toLowerCase();
    //Create a modle object using the filename as the reference without the .js pointing to a created sequelize instance of the file.

    var modelPath = "../models/"+file; //default assumes same directory that was used to scan.
    if(process.env.DOMAIN_NAME){ //If this enviroment variable is detected then change the modelPath.
      modelPath = "../../../../models/"+file;
    }
    models[name] = connection.import(modelPath);
  })
  return models;
}

调查问题后，我发现这是因为 models 文件夹没有被 serverless webpack 插件打包。

我最近发现如何在我的无服务器文件中使用此代码强制上传某些包。

webpackIncludeModules:
    forceInclude:
      - mysql
      - mysql2

这似乎只包含包，但是，当我尝试引用模型文件夹以自动包含所有 Sequelize 模型时，我收到一条错误，指出它不是包，这当然是有道理的。

这确实给我留下了一个问题:如何让它打包模型目录，而无需手动为每个模型执行 require 操作。我编写了一个动态函数来在运行时获取它们并将其导入到sequelize。

有关插件的信息在这里( https://github.com/serverless-heaven/serverless-webpack )，我浏览了所有内容，但似乎找不到答案。

使用无服务器打包的输出如下所示，缺少包含我的所有 Sequelize 模型的模型文件夹。

我在做 webpack 之前的主目录是这样的。

这也是我的 webpack.config.js。

const slsw = require("serverless-webpack");
const nodeExternals = require("webpack-node-externals");

module.exports = {
  entry: slsw.lib.entries,
  target: "node",
  // Since 'aws-sdk' is not compatible with webpack,
  // we exclude all node dependencies
  externals: [nodeExternals()],
  // Run babel on all .js files and skip those in node_modules
  module: {
    rules: [
      {
        test: /\.js$/,
        loader: "babel-loader",
        include: __dirname,
        exclude: /node_modules/
      }
    ]
  }
};

Answer 1

您可以使用copy-webpack-plugin包含模型而不是引用。

const slsw = require("serverless-webpack");
const nodeExternals = require("webpack-node-externals");
const CopyWebpackPlugin = require('copy-webpack-plugin');

module.exports = {
    entry: slsw.lib.entries,
    target: "node",
    // Since 'aws-sdk' is not compatible with webpack,
    // we exclude all node dependencies
    externals: [nodeExternals()],
    // Run babel on all .js files and skip those in node_modules
    module: {
        rules: [
            {
                test: /\.js$/,
                loader: "babel-loader",
                include: __dirname,
                exclude: /node_modules/
            }
        ]
    },
    plugin: [
        new CopyWebpackPlugin(filesToCopy, {})
    ]
};

确保从正确的文件夹导入模型，因为您是从相对路径导入的。如果您的 bundle 位于不同的文件夹中，这可能会改变。