加入两个以上的表在 sequelize 中不起作用答案

【问题标题】：joining of more then two table is not working in sequalize加入两个以上的表在 sequelize 中不起作用
【发布时间】：2021-03-24 09:09:45
【问题描述】：

我有两个模型用户，CandidateExperience 所以当我加入两个表时它不起作用。

我必须在用户模型中添加关联

module.exports = (sequelize, DataTypes) => {
  const Users = sequelize.define('Users', {
    name: {type: DataTypes.STRING},
    lName: {type: DataTypes.STRING},
    email: {type: DataTypes.STRING},
    }, {
    hooks: {},
    underscored: true
  });
  Users.associate = function (models) {
    Users.hasMany(models.CandidateDetails, {
      as: 'CandidateDetails',foreignKey: 'userId',constraints: false
    })
    Users.hasMany(models.CandidateExperience, {
      as: 'CandidateExperience',foreignKey: 'userId',constraints: false
    })
  };
  return Users;
};

候选体验模型

module.exports = (sequelize, DataTypes) => {
  const CandidateExperience = sequelize.define('CandidateExperience', {
    candidate_exp_id: {type: DataTypes.UUID,primaryKey: true},
    companyName: { type: DataTypes.STRING},
    designation: {type: DataTypes.STRING}
  }, {
    underscored: true
  });
  CandidateExperience.associate = function (models) {
    CandidateExperience.belongsTo(models.Users, {
      as: 'User',foreignKey: 'userId',constraints: false})
  };
  return CandidateExperience;
};

但是如果我使用这个查询它会给我错误

return models.Users.findAll({
            where: {userType:'engineer'},
            include: [
                { model: models.CandidateExperience, as: "experienceDetail" ,
                 required:       false},
                ]
          });

【问题讨论】：

标签： node.js join sequelize.js

【解决方案1】：

您正在使用别名“CandidateExperience”将用户与 CandidateExprience 相关联但是你用'exprienceDetail'打电话给User.findAll()。

试试这个

Users.hasMany(models.CandidateExperience, {
      as: 'experienceDetail',foreignKey: 'userId',constraints: false
})

Users.findAll({
            where: {userType:'engineer'},
            include: [
              { 
                 model: models.CandidateExperience, 
                 as: "CandidateExperience", 
                 required: false
              }
            ]
});

【讨论】：