Question

我正在尝试通过联结表插入与其他2个实体关联的新记录。像这样：

员工 - ＆lt; deploymentCrew＆gt; - 部署 - ＆lt; deploymentEquipment＆gt; - 设备

员工和部署表：

module.exports = function(sequelize, Sequelize) {

  var Staff = sequelize.define('staff', {

    _id: {
      autoIncrement: true,
      primaryKey: true,
      type: Sequelize.INTEGER
    },

    _firstname: {
      type: Sequelize.STRING,
      notEmpty: true
    },

    _lastname: {
      type: Sequelize.STRING
    },

    _phonework: {
      type: Sequelize.STRING
    },

    _phonehome: {
      type: Sequelize.STRING
    },

    _img: {
      type: Sequelize.STRING
    },

    _emailpersonal: {
      type: Sequelize.STRING
    },

    _emailwork: {
      type: Sequelize.STRING
    },

    _position: {
      type: Sequelize.STRING
    },

    _notes: {
      type: Sequelize.STRING
    },

    _status: {
      type: Sequelize.STRING,
      defaultValue: 'active'
    }

  });

  return Staff;

};


module.exports = function(sequelize, Sequelize) {

  var Deployment = sequelize.define('deployment', {

    _id: {
      autoIncrement: true,
      primaryKey: true,
      type: Sequelize.INTEGER
    },

    _datedeployed: {
      type: Sequelize.DATEONLY,
      notEmpty: true
    },

    _datereturned: {
      type: Sequelize.DATEONLY
    },

    _city: {
      type: Sequelize.STRING
    },

    _province: {
      type: Sequelize.STRING
    },

    _country: {
      type: Sequelize.STRING
    },


    _unitnumber: {
      type: Sequelize.STRING
    },

    _comments: {
      type: Sequelize.TEXT
    },

    _productid: {
      type: Sequelize.INTEGER
    },

    _contractid: {
      type: Sequelize.INTEGER
    },

    _deploymenttypeid: {
      type: Sequelize.INTEGER
    },

    _finalsold: {
      type: Sequelize.NUMERIC(17,3)
    },

    _pricing: {
      type: Sequelize.TEXT,
      get: function () {
        return JSON.parse(this.getDataValue('value'));
      },
      set: function (value) {
        this.setDataValue('value', JSON.stringify(value));
      }
    },

    _status: {
      type: Sequelize.STRING,
      defaultValue: 'active'
    },

    createdBy: {
      type: Sequelize.STRING
    }

  });


  return Deployment;

};

我的联结表代码就像这样：

  module.exports = function(sequelize, Sequelize) {

  var DeploymentEquipment = sequelize.define('deploymentEquipment', {

  });

  DeploymentEquipment.associate = function(models){
    models.equipment.belongsToMany(models.deployment, {through: models.deploymentEquipment, foreignKey: 'equipmentId'});
    models.deployment.belongsToMany(models.equipment, {through: models.deploymentEquipment, foreignKey: 'deploymentId'});
  };


  return DeploymentEquipment;

};


module.exports = function(sequelize, Sequelize) {

  var DeploymentCrew = sequelize.define('deploymentCrew', {

    _timex: {
      type: Sequelize.DATEONLY,
      notEmpty: true
    },

    _dateon: {
      type: Sequelize.DATEONLY
    },

    _dateoff: {
      type: Sequelize.DATEONLY
    },

    _role: {
      type: Sequelize.STRING
    }

  });

  DeploymentCrew.associate = function(models){
    models.staff.belongsToMany(models.deployment, {through: models.deploymentCrew, foreignKey: 'staffId'});
    models.deployment.belongsToMany(models.staff, {through: models.deploymentCrew, foreignKey: 'deploymentId'});
  };


  return DeploymentCrew;

};

这一切似乎都很有效。但是我的create语句在insert语句中省略了deploymentid。这是我的代码：

  var deployment = req.body;
  var crew = req.body._deploymentcrew;
  var equipment = req.body._deploymentequipment;

    //insert new deployment - start transaction, add deployment, get ID, loop through crew, loop through equipment
    models.sequelize.transaction(t =>{
      var promises = [];
      return models.deployment.create(req.body, {transaction: t}).then(function(newDeployment) {
        for(var i=0; i < equipment.length; i++){
          var equip = equipment[i];
          equip.deploymentid = newDeployment.id;
          equip.equipmentId = equipment[i].id;
          var newPromise = models.deploymentEquipment.create(equip, promises.push(newPromise));
        }

        for(var i=0; i < crew.length; i++){
          var staff = crew[i];
          staff.deploymentid = newDeployment.id;
          staff.staffId = crew[i].staff.id;
          var newPromise = models.deploymentCrew.create(staff, promises.push(newPromise));
        }

        return Promise.all(promises)
      });

当我查看控制台时，这是插入语句：

执行（默认）：INSERT INTO deploymentCrews（_timex，_dateon，_dateoff，_role，createdAt，{{1} }，updatedAt）价值观（＆＃39; 2018-03-01＆＃39;，＆＃39; 2018-03-12＆＃39;，N ULL，＆＃39; lead＆＃39;，2018-03-02 19：21：10＆＃39;，＆＃39; 2018-03-02 19：21：10＆＃39;，5）;

请注意，有staffId，但没有deploymentId。有什么想法？我尝试过使用include：[models._deploymentcrew]，但我不确定这种方式可以处理事务。

任何建议都将非常感谢。谢谢！

Answer 1

在创建N：M关联时，我们需要指定两个表的外键，如下所示

Staff.associate = function(models){
    Staff.belongsToMany(models.deployment, {through: models.deploymentCrew, foreignKey: 'staffId'});
};

Deployment.associate = function(models) {
   Deployment.belongsToMany(models.staff, {through: models.deploymentCrew, foreignKey: 'deploymentId'});
};

将上述内容添加到相应的表定义中，并删除deploymentCrew中的关联

Sequelize使用include和junction table创建事务

1 个答案: