Sequelize:错误:错误:Table1 未关联到 Table2

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问题描述

我正在尝试使用 sequelize 创建以下关联，但我不断收到以下错误错误:错误:客户未与订单关联！".根据我在文档中找到的内容，我有双向关联.我对问题可能是什么感到困惑，因为当我查看数据库表时，我可以看到外键.对于此示例，我试图提取与特定订单关联的订单和客户.从技术上讲，我可以执行三个单独的 db pull，但与连接相比，这似乎效率低.

I am trying to create the following associations using sequelize but I keep getting the following error "Error: Error: customer is not associated to order!". I have bi-directional associations according to what I found in the documentation. I am confused about what the problem could be because when I look into the database tables I can see the foreign keys. For this example, I am trying to pull the order and customer associated with the particular order. Technically, I could do three seaprate db pull but that seems inefficient as opposed to joins.

'use strict';

module.exports = function(sequelize, DataTypes) {
  var user = sequelize.define('user', {
    username: DataTypes.STRING(30), //remove
    password: DataTypes.STRING(255),
    emailaddress: DataTypes.STRING(255),
    firstname: DataTypes.STRING(30),
    middlename: DataTypes.STRING(30), //remove
    lastname: DataTypes.STRING(30),
    approve: DataTypes.BOOLEAN,
    roles: DataTypes.STRING(50),
    isactive: DataTypes.BOOLEAN
  }, {
    classMethods: {
      associate: function(models) {
        // associations can be defined here
        this.hasMany(models.order);
      }
    }
  });

  user.hook('afterCreate', function(usr, options) {
      //hash the password

      return user.update({ password: passwd }, {
        where: {
          id: usr.id
        }
      });
  });

  return user;
};



'use strict';
module.exports = function(sequelize, DataTypes) {
  var order = sequelize.define('order', {
    ponumber: DataTypes.STRING(30), //remove
    orderdate: DataTypes.DATE,
    shippingmethod: DataTypes.STRING(30),
    shippingterms: DataTypes.STRING(30),
    deliverydate: DataTypes.DATE,
    paymentterms: DataTypes.STRING(30),
    overridediscount: DataTypes.BOOLEAN,
    shippingaddress: DataTypes.STRING(30),
    shippingcity: DataTypes.STRING(30),
    shippingstate: DataTypes.STRING(20),
    shippingzipcode: DataTypes.STRING(10),
    isactive: DataTypes.BOOLEAN
  }, {
      associate: function(models) {
        // associations can be defined here
        this.belongsTo(models.user);
        this.belongsTo(models.customer);
      }
  });

  order.hook('afterCreate', function(ord, options) {
      //generate po number

      return order.update({ ponumber: ponumbr }, {
        where: {
          id: ord.id
        }//,
        //transaction: options.transaction
      });
  });

  return order;
};


'use strict';
module.exports = function(sequelize, DataTypes) {
  var customer = sequelize.define('customer', {
    customernumber: DataTypes.STRING(30), //remove
    customerspecificationid: DataTypes.INTEGER,
    customertypeid: DataTypes.INTEGER,
    sportid: DataTypes.INTEGER,
    customername: DataTypes.STRING(20), //remove
    address: DataTypes.STRING(30),
    city: DataTypes.STRING(30),
    state: DataTypes.STRING(30),
    zipcode: DataTypes.STRING(30),
    ordercomplete: DataTypes.BOOLEAN,
    isactive: DataTypes.BOOLEAN
  }, {
      associate: function(models) {
          // associations can be defined here
        this.hasMany(models.order);
      }
  });

  customer.hook('afterCreate', function(cust, options) {
      //generate the customer number

        return customer.update({ customernumber: custnumber }, {
        where: {
          id: cust.id
        }
      });
  });

  return customer;
};


Here is the constructor and method inside of a repository class I want to join 

constructor(model){
    super(model.order);
    this.currentmodel = model;
}


findById(id){
    let that = this;
    return new Promise(
        function(resolve, reject) {
            that.model.find({
                where: { id: id },
                include: [ that.currentmodel.customer, that.currentmodel.user ]
            })
            .then(function(order){
                resolve(order);
            })
            .catch(function(err){
                reject(err);
            })
    });
}

我已查看文档并在互联网上搜索以寻找解决此问题的方法，但我没有找到任何答案.有人可以阐明我可能缺少的东西吗?

I have reviewed the documentation and searched the internet looking for a fix to this issue but I am not finding any answers. Could someone please shed some light on what I could be missing?

对于上面的示例，我试图通过主键检索绑定到订单记录的用户和客户.到目前为止，我发现的所有 findBy 场景都是获取与客户和用户相关的订单列表.为了检索外键与该订单相关联的订单和客户，我需要进行哪些更改?

For the example above, I am trying to retrieve the user and the customer tied to the order record via the primary key. All of the findBy scenarios I have found so far would be getting a list of orders tied to the customer and user. What do I need to change in order to retrieve the order and customer whose foreign keys are tied to this order?

推荐答案

问题可能在于你如何设置关联，请提及你的策略.

The problem is probably with how you are setting you association, kindly mention your strategy.

如果您使用 express index.js 文件设置然后查询 http://docs.sequelizejs.com/en/1.7.0/articles/express/

Following is working fine if you use the express index.js file setup and then query http://docs.sequelizejs.com/en/1.7.0/articles/express/

'use strict';
module.exports = function(sequelize, DataTypes) {
  var customer = sequelize.define('customer', {
    customernumber: DataTypes.STRING(30), //remove
    customerspecificationid: DataTypes.INTEGER,
    customertypeid: DataTypes.INTEGER,
    sportid: DataTypes.INTEGER,
    customername: DataTypes.STRING(20), //remove
    address: DataTypes.STRING(30),
    city: DataTypes.STRING(30),
    state: DataTypes.STRING(30),
    zipcode: DataTypes.STRING(30),
    ordercomplete: DataTypes.BOOLEAN,
    isactive: DataTypes.BOOLEAN
  }, {
      associate: function(models) {
          // associations can be defined here
        models.customer.hasMany(models.order);
      }
  });

  customer.hook('afterCreate', function(cust, options) {
      //generate the customer number

        return customer.update({ customernumber: custnumber }, {
        where: {
          id: cust.id
        }
      });
  });

  return customer;
};


'use strict';
module.exports = function(sequelize, DataTypes) {
  var order = sequelize.define('order', {
    ponumber: DataTypes.STRING(30), //remove
    orderdate: DataTypes.DATE,
    shippingmethod: DataTypes.STRING(30),
    shippingterms: DataTypes.STRING(30),
    deliverydate: DataTypes.DATE,
    paymentterms: DataTypes.STRING(30),
    overridediscount: DataTypes.BOOLEAN,
    shippingaddress: DataTypes.STRING(30),
    shippingcity: DataTypes.STRING(30),
    shippingstate: DataTypes.STRING(20),
    shippingzipcode: DataTypes.STRING(10),
    isactive: DataTypes.BOOLEAN
  }, {
      associate: function(models) {
        // associations can be defined here
        models.order.belongsTo(models.user);
        models.order.belongsTo(models.customer);
      }
  });

  order.hook('afterCreate', function(ord, options) {
      //generate po number

      return order.update({ ponumber: ponumbr }, {
        where: {
          id: ord.id
        }//,
        //transaction: options.transaction
      });
  });

  return order;
};

'use strict';

module.exports = function(sequelize, DataTypes) {
  var user = sequelize.define('user', {
    username: DataTypes.STRING(30), //remove
    password: DataTypes.STRING(255),
    emailaddress: DataTypes.STRING(255),
    firstname: DataTypes.STRING(30),
    middlename: DataTypes.STRING(30), //remove
    lastname: DataTypes.STRING(30),
    approve: DataTypes.BOOLEAN,
    roles: DataTypes.STRING(50),
    isactive: DataTypes.BOOLEAN
  }, {
    classMethods: {
      associate: function(models) {
        // associations can be defined here
        models.user.hasMany(models.order);
      }
    }
  });

  user.hook('afterCreate', function(usr, options) {
      //hash the password

      return user.update({ password: passwd }, {
        where: {
          id: usr.id
        }
      });
  });

  return user;
};

//关联路由的 index.js 文件

// index.js file where you shall associate the routes

var fs        = require('fs')
    , path      = require('path')
    , Sequelize = require('sequelize')
    , lodash    = require('lodash')
    , sequelize = new Sequelize('sequelize_test', 'root', 'root')
    , db        = {} 

  fs.readdirSync(__dirname)
    .filter(function(file) {
      return (file.indexOf('.') !== 0) && (file !== 'index.js')
    })
    .forEach(function(file) {
      var model = sequelize.import(path.join(__dirname, file))
      db[model.name] = model
    })

  Object.keys(db).forEach(function(modelName) {
    if (db[modelName].options.hasOwnProperty('associate')) {
      db[modelName].options.associate(db)
    }
  })
  // sequelize.sync({force: true})
  module.exports = lodash.extend({
    sequelize: sequelize,
    Sequelize: Sequelize
  }, db)

将上面的数据库代码放在db文件夹中的相应文件中或任何您喜欢的名称中，然后您就可以使用您的查询

Put the above db code in respective files in db folder or whatever you like to name it and then you can use your query

var db = require('./db');

db.order.find({
            where: { id: 0 },
            include: [ db.customer, db.user ]
        })
        .then(function(order){
            console.log(order)
        })

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Sequelize:错误:错误:Table1 未关联到 Table2

问题描述

推荐答案

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