Question

~~我已经花了几个小时一无所获。~~我有很多资源，它们都差不多，但我只是无法使我的项目正常工作。

这个问题Sequelize.js - "is not associated to"与我的非常相似，但是，我的这个问题不应重复。因为它肯定有一个新问题！

要列出我的信息来源，请仔细阅读并尝试：

要添加上下文，我正在尝试提供一种路由，使用户可以获取其个人资料。每个用户只有一个角色。

像这样：

{
  id: 4,
  email: 'adsads@saas.com',
  role: {
     id: 2,
     name: 'admin'
  }
}

将findOne与WHERE和INCLUDE一起使用

exports.getme = (req, res) => {
  db.users.findOne({
    where: { id: req.user.id },
    include: [{
      model: db.roles,
    }]
  })  
  .then(data => {
    res.send(data)
  })
  .catch(err => {
    console.log(err)
    res.status(500).send({
      message: "An error has occured while retrieving data."
    })
  })
}

我得到的错误是：

角色未与用户关联！

这是模型，以及我如何放置它们各自的关联：

Role.js

'use strict';
module.exports = (sequelize, DataTypes) => {
  const Role = sequelize.define('Role', {
    id: {
      type: DataTypes.INTEGER,
      allowNull: false,
      primaryKey: true,
      autoIncrement: true,
      field: "id"
    },
    role: DataTypes.STRING
  }, {
    timestamps: false
  });
  Role.associate = function (models) {
    Role.hasMany(models.User, {
      foreignKey: "roleId",
      sourceKey: "id"
    })
  }
  return Role;
};

User.js

'use strict';
module.exports = (sequelize, DataTypes) => {
  const User = sequelize.define('User', {
    id: { type: DataTypes.BIGINT, allowNull: false, autoIncrement: true, unique: true, primaryKey: true },
    email: DataTypes.STRING,
  }, {});
  User.associate = function (models) {
    User.belongsTo(models.Role, { 
      foreignKey: "roleId", 
      targetKey: "id"
    });
  }
  return User
}

此外，当我检查表的关系时，我只能在 USER 表中看到详细信息，而在 ROLES 中则看不到任何详细信息。桌子。

编辑：从评论部分分析得出，db.users启动时似乎findOne没有关联。在我的server.js中设置模型的方法如下：

....
const db = require("./app/models")

if (process.env.NODE_ENV === "production") {
  db.sequelize.sync().then(() => {
    useRoutes()
    seedDB()
  })
} else {
  db.sequelize.sync({ force: true }).then(() => {
    console.log("Drop and re-sync db.")
    useRoutes()
    seedDB()
  })
}

function useRoutes() {
  console.log("Use routes...")
  require("./app/routes/user/user.routes")(app)
  require("./app/routes/emojis/emojis.routes")(app)
  require("./app/routes/auth/auth.routes")(app)

  const db = require("./app/models")
  // Custom.
  db.op = db.Sequelize.Op
  // Models
  db.appsettings = require("./app/models/appsettings/appsettings.model")(db.sequelize, db.Sequelize)
  db.countries = require("./app/models/appsettings/country.model")(db.sequelize, db.Sequelize)

  db.users = require("./app/models/user/user.model")(db.sequelize, db.Sequelize)
  db.roles = require("./app/models/user/role.model")(db.sequelize, db.Sequelize)
  db.userscores = require("./app/models/user/userscore.model")(db.sequelize, db.Sequelize)

  db.answers = require("./app/models/game/answer.model")(db.sequelize, db.Sequelize)
  db.categories = require("./app/models/game/category.model")(db.sequelize, db.Sequelize)
  db.questions = require("./app/models/game/question.model")(db.sequelize, db.Sequelize)
  db.useracoomplishedquestions = require("./app/models/game/useracoomplishedquestion.model")(db.sequelize, db.Sequelize)
}

models / index.js （由Sequelize生成，我对其进行了一些修改，并使用glob轻松浏览了子文件夹）

'use strict';

const fs = require('fs');
const path = require('path');
const Sequelize = require('sequelize');
const basename = path.basename(__filename);
const env = process.env.NODE_ENV || 'development';
const config = require(__dirname + '/../config/config')[env];
const db = {};
const glob = require("glob")

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

// Use glob to access model files inside subfolders.
const files = glob.sync(__dirname + "/*/*.js")

files.forEach(file => {
  const model = sequelize['import'](file);
  db[model.name] = model;
})

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

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

module.exports = db;

Answer 1

通过此代码

// Models
  db.appsettings = require("./app/models/appsettings/appsettings.model")(db.sequelize, db.Sequelize)
  db.countries = require("./app/models/appsettings/country.model")(db.sequelize, db.Sequelize)

  db.users = require("./app/models/user/user.model")(db.sequelize, db.Sequelize)
  db.roles = require("./app/models/user/role.model")(db.sequelize, db.Sequelize)
  db.userscores = require("./app/models/user/userscore.model")(db.sequelize, db.Sequelize)

  db.answers = require("./app/models/game/answer.model")(db.sequelize, db.Sequelize)
  db.categories = require("./app/models/game/category.model")(db.sequelize, db.Sequelize)
  db.questions = require("./app/models/game/question.model")(db.sequelize, db.Sequelize)
  db.useracoomplishedquestions = require("./app/models/game/useracoomplishedquestion.model")(db.sequelize, db.Sequelize)

您覆盖了在models / index.js中注册的模型定义，这就是为什么这些模型没有关联的原因。只需删除这些行即可。

Sequelize模型与模型无关

1 个答案: