安装依赖
yarn add egg-mongoose
注册插件
'use strict';

module.exports = {
  mongoose: {
    enable: true,
    package: 'egg-mongoose',
  }
};

据我的理解这注册什么名 再config文件里就叫什么

配置mongodb

config/config.default.js

/* eslint valid-jsdoc: "off" */

'use strict';

const options = {
  host: "xxx.xx.xx.x",
  port: "27017",
  db_name: "xxx",
  user: "xxx",
  pass: "xxx",
};

const url = `mongodb://${options.user}:${options.pass}@${options.host}:${options.port}/${options.db_name}`;

/**
 * @param {Egg.EggAppInfo} appInfo app info
 */
module.exports = appInfo => {
  /**
   * built-in config
   * @type {Egg.EggAppConfig}
   **/
  const config = exports = {};

  // use for cookie sign key, should change to your own and keep security
  config.keys = appInfo.name + '_1635295023359_9413';

  // add your middleware config here
  config.middleware = [];

  // add your user config here
  const userConfig = {
    // myAppName: 'egg',
  };

  config.security = {
    csrf: {
      enable: false,
    },
  };

  return {
    ...config,
    ...userConfig,
    mongoose: {
      url,
      options: {
        useUnifiedTopology: true
      }
    }
  };
};

主要就原本的导出加一个mongoose属性

module.exports = appInfo => {
  return {
      ...config,
      ...userConfig,
      mongoose: {
        url:"mongodb://xxxxxx",
        options: {
          useUnifiedTopology: true
        }
      }
    };
  }

使用

model 创建 表字段类型 很重要 没有注册字段controller中无法操作

再 ​​app/model​​​ 下 建文件操作一个表 如
​​​app/model/comment.js​​

module.exports = app => {
    const mongoose = app.mongoose;
    const Schema = mongoose.Schema;

    const CommentSchema = new Schema({
        content: { type: String },
        type: { type: Number },
        sender: { type: mongoose.Types.ObjectId },
        thumbsUp: { type: Number }
    });

    return mongoose.model('Comment', CommentSchema, 'comment');
}

这样 使用时就有 ​​ctx.model[.modelName]​​​​app/controller/comment.js​​

const Controller = require('egg').Controller;

class CommentController extends Controller {
  async queryComment() {
      const { ctx } = this;

      const comments = await ctx.model.Comment.find();
      console.log("comments:", comments);
      ctx.body = { comments };
    }
}
关闭csrf (不建议)

刚进行请求时会报错 关闭安全策略可以访问但是不安全 有条件的不要这么做
​​​config/config.default.js​​

config.security = {
    csrf: {
      enable: false,
    },
  };