未处理的拒绝 SequelizeEagerLoadingError：未关联，并且无法读取未定义的属性“getTableName”

Posted 2023-04-12

【中文标题】未处理的拒绝 SequelizeEagerLoadingError：未关联，并且无法读取未定义的属性“getTableName”

【英文标题】：Unhandled rejection SequelizeEagerLoadingError: is not associated to, and Cannot read property 'getTableName' of undefined

【发布时间】：2018-09-03 16:28:53

【问题描述】：

我有 3 个表：User、Trip、authoriseDate。 这是同事： 一个用户有很多次旅行，一个用户有一个 authoriseDate 用户一对多行程 用户一对一授权日期 这是模型 用户

 module.exports = (sequelize, DataTypes) => 
  const user = sequelize.define('User', 
    id:  type: DataTypes.INTEGER, primaryKey: true, autoIncrement: true ,
    email:  type: DataTypes.STRING(50), unique: true ,
    phoneNumber: 
      type: DataTypes.STRING(12), unique: true,
    ,
  , 
    classMethods: 
      associate(models) 
        // associations can be defined here
        user.hasOne(models.authoriseDate,  foreignKey: 'userId' );
        user.hasMany(models.Trip,  foreignKey: 'userId' );
      ,
    ,
  );
  return user;
;

旅行

module.exports = (sequelize, DataTypes) => 
  const trip = sequelize.define('Trip', 
    id:  type: DataTypes.INTEGER, primaryKey: true, autoIncrement: true ,
    userId: DataTypes.INTEGER,
    status: DataTypes.INTEGER,
  , 
    classMethods: 
      associate(models) 
        // associations can be defined here
        trip.belongsTo(models.User,  foreignKey: 'userId' );
      ,
    ,
  );
  return trip;
;

授权日期

module.exports = (sequelize, DataTypes) => 
  const authoriseDate = sequelize.define('AuthoriseDate', 
    id:  type: DataTypes.INTEGER, primaryKey: true, autoIncrement: true ,
    userId: DataTypes.INTEGER,
    lastAuthorise: DataTypes.DATE,
  , 
    classMethods: 
      associate(models) 
        // associations can be defined here
        authoriseDate.belongsTo(models.User,  foreignKey: 'userId', );
      ,
    ,
  );
  return authoriseDate;
;

但是当我使用 findAll 函数时

models.User.findAll(
    include: [
      model: models.Trip,
    ,
    
      model: models.authoriseDate,
    ],
  )

这是我的模型文件

    'use strict';

var fs = require('fs');
var path = require('path');
var Sequelize = require('sequelize');
var basename = path.basename(module.filename);
//var env = process.env.NODE_ENV || 'development';
//var config    = require(__dirname + './../../../config/config.json')[env];
var config = require('../../config/env')
var db = ;

// if (config.use_env_variable) 
//   var sequelize = new Sequelize(process.env[config.use_env_variable]);
//  else 
//   var sequelize = new Sequelize(config.database, config.username, config.password, config);
// 

var sequelize = new Sequelize(config.dbName, config.dbUserName, config.dbPassword, 
  host: config.dbHost,
  dialect: config.dbDialect,
);

fs
  .readdirSync(__dirname)
  .filter(function (file) 
    return (file.indexOf('.') !== 0) && (file !== basename);
  )
  .forEach(function (file) 
    if (file.slice(-3) !== '.js') return;
    var model = sequelize['import'](path.join(__dirname, file));
    db[model.name] = model;
  );

Object.keys(db).forEach(function (modelName) 
  if (db[modelName].associate) 
    db[modelName].associate(db);
  
);

db.sequelize = sequelize;
db.Sequelize = Sequelize;

module.exports = db;

我收到以下错误： 未处理的拒绝 SequelizeEagerLoadingError：Trip 未与用户关联，并且无法读取未定义的属性“getTableName” 我不知道如何解决这些错误，请任何人帮助我

【参考方案1】：

您需要调用函数关联。

例子：

AuthoriseDate 模型

module.exports = (sequelize, DataTypes) => 
    const authoriseDate = sequelize.define('AuthoriseDate', 
        id:  type: DataTypes.INTEGER, primaryKey: true, autoIncrement: true ,
        userId: DataTypes.INTEGER,
        lastAuthorise: DataTypes.DATE,
    );

    authoriseDate.associate = (models) => 
        // associations can be defined here
        authoriseDate.belongsTo(models.User,  foreignKey: 'userId', );
    ;


    return authoriseDate;
;

出行模式

module.exports = (sequelize, DataTypes) => 
    const trip = sequelize.define('Trip', 
        id:  type: DataTypes.INTEGER, primaryKey: true, autoIncrement: true ,
        userId: DataTypes.INTEGER,
        status: DataTypes.INTEGER,
    );

    trip.associate = (models) => 
        // associations can be defined here
        trip.belongsTo(models.User,  foreignKey: 'userId' );
    ;

    return trip;
;

用户模型

module.exports = (sequelize, DataTypes) => 
    const user = sequelize.define('User', 
        id:  type: DataTypes.INTEGER, primaryKey: true, autoIncrement: true ,
        email:  type: DataTypes.STRING(50), unique: true ,
        phoneNumber: 
            type: DataTypes.STRING(12), unique: true,
        ,
    );

    user.associate = (models) => 
        // associations can be defined here
        user.hasOne(models.AuthoriseDate,  foreignKey: 'userId' );
        user.hasMany(models.Trip,  foreignKey: 'userId' );
    ;


    return user;
;

初始化模型

'use strict';

var fs = require('fs');
var path = require('path');
var Sequelize = require('sequelize');
var basename = path.basename(module.filename);
//var env = process.env.NODE_ENV || 'development';
//var config    = require(__dirname + './../../../config/config.json')[env];
// var config = require('../../config/env')
var db = ;

var sequelize = new Sequelize('test_01', 'root', 'root', 
    host: 'localhost',
    dialect: 'mysql',
);

fs
    .readdirSync(__dirname)
    .filter(function (file) 
        return (file.indexOf('.') !== 0) && (file !== basename);
    )
    .forEach(function (file) 
        if (file.slice(-3) !== '.js') return;
        var model = sequelize['import'](path.join(__dirname, file));
        db[model.name] = model;
    );

console.log(db);

Object.keys(db).forEach((modelName) => 
    if (db[modelName].associate) 
        db[modelName].associate(db);
    
);

(async () => 
    await sequelize.sync();
)();

db.sequelize = sequelize;
db.Sequelize = Sequelize;

module.exports = db;

使用查找

(async () => 
    const models = require('./models');

    const users = await models.User.findAll(
        include: [
            
                model: models.Trip,
            ,
            
                model: models.AuthoriseDate,
            ,
        ],
    );

    console.log(users);
)();

http://docs.sequelizejs.com/manual/tutorial/associations.html

【讨论】：

是的，我在我的索引模型中做到了，你可以看到我的更新

我必须像这样创建关联？ Project.hasMany(User, as: 'Workers') 我虽然我在我的模型中这样做了 classMethods: associate(models) // 关联可以在这里定义 authoriseDate.belongsTo(models.User, foreignKey: '用户身份'， ）; , ,

不，这是示例。您初始化关联。您是在 find 之后还是之前初始化关联？

那我现在该怎么办

显示你的模型导入文件