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    egg-sequelize-plus

    2.1.2 • Public • Published

    egg-sequelize-plus

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    Sequelize plugin for Egg.js,Based on egg-sequelize at present

    NOTE: This plug-in integrates sequelize to egg.js on the basis of egg sequelize, provides dynamic database creation, realizes data dynamic deployment, and is perfectly compatible with all functions of the current egg sequelize plug-in more documentation please visit sequelize and egg-sequelize

    egg-sequelize-plus egg 1.x
    1.x 😁
    0.x

    Install

    $ npm i egg-sequelize-plus --save

    If the egg project fails to start and reminds mysql2 or sequelize module that it cannot be found , just like this

    could not find module 'mysql2' 
    // or 
    could not find module 'sequelize'
    

    you can try the following command

    $ npm install mysql2 --save
    // or 
    $ npm install sequelize --save

    Usage

    // {app_root}/config/plugin.js
    exports.sequelizePlus = {
      enable: true,
      package: 'egg-sequelize-plus',
    };

    Configuration

    // {app_root}/config/config.default.js
    exports.sequelizePlus = {
      dialect: 'mysql', // support: mysql, mariadb, postgres, mssql 
      database: 'test',
      host: 'localhost', //default
      port: 3306,
      username: 'root', // default
      password: 'root', // default
      // delegate: 'myModel', // load all models to `app[delegate]` and `ctx[delegate]`, default to `model`
      // baseDir: 'my_model', // load all files in `app/${baseDir}` as models, default to `model`
      // exclude: 'index.js', // ignore `app/${baseDir}/index.js` when load models, support glob and array
      // more sequelize options
      logging: false,
      options: {
        timezone: 'Asia/Shanghai',
        pool: {
          maxConnections: 5,
        },
      },
    };

    You can also use the connection uri to configure the connection:

    exports.sequelize = {
      dialect: 'mysql', // support: mysql, mariadb, postgres, mssql
      connectionUri: 'mysql://root:@127.0.0.1:3306/test',
      // delegate: 'myModel', // load all models to `app[delegate]` and `ctx[delegate]`, default to `model`
      // baseDir: 'my_model', // load all files in `app/${baseDir}` as models, default to `model`
      // exclude: 'index.js', // ignore `app/${baseDir}/index.js` when load models, support glob and array
      // more sequelize options
    };

    egg-sequelize has a default sequelize options below

    {
        delegate: 'model',
        baseDir: 'model',
        logging(...args) {
          // if benchmark enabled, log used
          const used = typeof args[1] === 'number' ? `[${args[1]}ms]` : '';
          app.logger.info('[egg-sequelize]%s %s', used, args[0]);
        },
        host: 'localhost',
        port: 3306,
        username: 'root',
        benchmark: true,
        define: {
          freezeTableName: false,
          underscored: true,
        },
      }

    see config/config.default.js for more detail and default config

    Model files

    Please put models under app/model dir by default.

    Conventions

    model file class name
    user.js app.model.User
    person.js app.model.Person
    user_group.js app.model.UserGroup
    user/profile.js app.model.User.Profile
    • Tables always has timestamp fields: created_at datetime, updated_at datetime.
    • Use underscore style column name, for example: user_id, comments_count.

    Standard

    Define a model first.

    NOTE: options.delegate default to model, so app.model is an Instance of Sequelize, so you can use methods like: app.model.sync, app.model.query ...

    // app/model/user.js 
    module.exports = app => {  
      const { STRING, INTEGER, DATE } = app.Sequelize; 
        const User = app.model.define('user', {    
        login: STRING,    
        name: STRING(30),    
        password: STRING(32),    
        age: INTEGER,    
        last_sign_in_at: DATE,    
        created_at: DATE,    
        updated_at: DATE,  
      });   
      User.findByLogin = async function(login) {        
        return await this.findOne({      
          where: {        
            login: login      
            }    
          });
        }   
    // don't use arraw function  
    User.prototype.logSignin = async function() {    
      return await this.update({ 
        last_sign_in_at: new Date() 
        }); 
      } 
      return User;
    }; 

    Now you can use it in your controller:

    // app/controller/user.js
    class UserController extends Controller {  
      async index() {    
      const users = await this.ctx.model.User.findAll();
      this.ctx.body = users;
      }
      async show() {
      const user = await this.ctx.model.User.findByLogin(this.ctx.params.login);    
      await user.logSignin();
      this.ctx.body = user;
    }

    Associate

    Define all your associations in Model.associate() and egg-sequelize will execute it after all models loaded. See example below.

    Multiple Datasources

    egg-sequelize support load multiple datasources independently. You can use config.sequelize.datasources to configure and load multiple datasources.

    // config/config.default.js
    exports.sequelize = {  
      datasources: [{     
         delegate: 'model', // load all models to app.model and ctx.model 
         baseDir: 'model', // load models from `app/model/*.js`
         database: 'biz',      // other sequelize configurations
      },    
      {      
        delegate: 'admninModel', // load all models to app.adminModel and ctx.adminModel 
        baseDir: 'admin_model', // load models from `app/admin_model/*.js` 
        database: 'admin',      // other sequelize configurations
       }]
    };

    Then we can define model like this:

    // app/model/user.js
    module.exports = app => {
        const { STRING, INTEGER, DATE } = app.Sequelize;
        const User = app.model.define('user', {
          login: STRING,
          name: STRING(30),
          password: STRING(32),
          age: INTEGER,
          last_sign_in_at: DATE,
          created_at: DATE,        
          updated_at: DATE,
        });  
        return User;
    }; 
    // app/admin_model/user.js
    module.exports = app => { 
        const { STRING, INTEGER, DATE } = app.Sequelize;
        const User = app.adminModel.define('user', { 
        login: STRING, 
        name: STRING(30), 
        password: STRING(32),
        age: INTEGER, 
        last_sign_in_at: DATE,
        created_at: DATE, 
        updated_at: DATE, 
      });
      return User;
    };

    If you define the same model for different datasource, the same model file will be excute twice for different database, so we can use the secound argument to get the sequelize instance:

    // app/model/user.js
    // if this file will load multiple times for different datasource
    // we can use the secound argument to get the sequelize instance
    module.exports = (app, model) => {
        const { STRING, INTEGER, DATE } = app.Sequelize;
        const User = model.define('user', {
        login: STRING,
        name: STRING(30),
        password: STRING(32),
        age: INTEGER,    
        last_sign_in_at: DATE,    
        created_at: DATE,    
        updated_at: DATE, 
        });   
        return User;
    };

    Customize Sequelize

    By default, egg-sequelize will use sequelize@5, you can cusomize sequelize version by pass sequelize instance with config.sequelize.Sequelize like this:

    // config/config.default.js
    exports.sequelize = { 
       Sequelize: require('sequelize');
    };

    Full example

    // app/model/post.js
     module.exports = app => {  
       const { STRING, INTEGER, DATE } = app.Sequelize;   
       const Post = app.model.define('Post', {    
         name: STRING(30),    
         user_id: INTEGER,    
         created_at: DATE,    
         updated_at: DATE,  });   
         Post.associate = function() {    
           app.model.Post.belongsTo(app.model.User, { 
             as: 'user' 
           }); 
          }   
        return Post;
         };
    // app/controller/post.js
    class PostController extends Controller {  a
      async index() {    
        const posts = await this.ctx.model.Post.findAll({      
          attributes: [ 'id', 'user_id' ],      
          include: { model: this.ctx.model.User, as: 'user' },      
          where: { status: 'publish' },      
          order: 'id desc',    });     
          this.ctx.body = posts;  
      }   
      async show() {    
        const post = await this.ctx.model.Post.findByPk(this.params.id);    const user = await post.getUser();    
        post.setDataValue('user', user);    
        this.ctx.body = post;  
      }   
      async destroy() {    
        const post = await this.ctx.model.Post.findByPk(this.params.id);    await post.destroy();    
        this.ctx.body = { 
          success: true 
        };  
      }
    }

    Sync model to db

    We strongly recommend you to use Sequelize - Migrations to create or migrate database.

    This code should only be used in development.

    // {app_root}/app.js
    module.exports = app => {  
      if (app.config.env === 'local' || app.config.env === 'unittest') {    
        app.beforeStart(async () => {      
        await app.model.sync({force: true});    
        });  
    }};
    

    Questions & Suggestions

    Please open an issue here.

    Author

    Taylor

    License

    MIT

    Install

    npm i egg-sequelize-plus

    DownloadsWeekly Downloads

    26

    Version

    2.1.2

    License

    MIT

    Unpacked Size

    24.8 kB

    Total Files

    8

    Last publish

    Collaborators

    • mmdapl