模型A与模型B没有关联后遗症错误

Question

我有以下问题，我有2个模型：客户端

module.exports = (sequelize, DataTypes) => {
const Client = sequelize.define('Client', {      
  first_name: DataTypes.STRING,
  last_name: DataTypes.STRING,
  phone: DataTypes.STRING,
  mobile_phone: DataTypes.STRING,
  email: DataTypes.STRING,                             
});

//creating association Client with Gender
Client.associate = function (models) {
  Client.hasOne(models.Gender, {     
       //     
  });
};


return Client; }

和性别：

module.exports = (sequelize, DataTypes) => {
const Gender = sequelize.define('Gender', {      
  name: DataTypes.STRING,                             
});

//creating association Gender with Employee
Gender.associate = function (models) {
  models.Gender.hasMany(models.Employee, {   
    //                         
  });
};

//creating association Gender with Client
Gender.associate = function (models) {
  models.Gender.belongsTo(models.Client, { 
    foreignKey: 'gender_id'                   
  });
};

return Gender; }

我的ClientController：

const { Client, Gender } = require('../models');

class ClientController {

  // Apresenta todos os resgistros do determinado Model
  async index (req, res) {
      const clients = await Client.findAll({});

      return res.status(200).json({
          status: 'ok',
          clients
      });
  }

  // Apresenta os atributos setados de um resgistro específico
  async show (req, res) {
      const client = await Client.findAll({
          attributes: ['id', 'first_name', 'last_name', 'phone', 'mobile_phone', 'email'],
          where: {
              id: req.params.id
          },
          include: [{
              model: Gender,                 
              attributes: [],

          }],
      });

      return res.status(200).json({
          status: 'ok',
          client
      });
  }

  // Cria e salva um resgistro do Model especificado
  async store (req, res) {
      const client = await Client.create(req.body);

      return res.status(201).json({
          status: 'created',
          client
      });
  }

  // Edita e salva um resgistro do Model especificado
  async update (req, res) {
      const { first_name, last_name, phone, mobile_phone, email } = req.body;

      const client = await Client.update({
          first_name: first_name,
          last_name: last_name,
          phone: phone,
          mobile_phone: mobile_phone,
          email: email

      }, {
          where: {
              id: req.params.id
          }
      });

      return res.status(200).json({
          status: 'updated',
          client
      });
  }

  // Exclui um resgistro do Model especificado
  async destroy (req, res) {
      await Client.destroy({
          where: {
              id: req.params.id
          }
      });

      return res.status(204).json({
          status: 'removed'
      });
  }
}

module.exports = new ClientController()

但我又想到了以下几点：

节点./bin/www

OBS：在与透视表的N：m关系中，一切正常，有人能帮我吗？

Answer 1

您正在用第二个关联覆盖第一个关联：

//creating association Gender with Employee
Gender.associate = function (models) {
  models.Gender.hasMany(models.Employee, {   
    //                         
  });
};

//creating association Gender with Client
Gender.associate = function (models) {
  models.Gender.belongsTo(models.Client, { 
    foreignKey: 'gender_id'                   
  });
};

把它们组合成一个：

//creating Gender associations
Gender.associate = function (models) {
  models.Gender.hasMany(models.Employee, {   
  models.Gender.belongsTo(models.Client, { 
    foreignKey: 'gender_id'                   
  });
};