Sequelize orm为什么不工作？

Question

我试图将两张桌子联系起来。

这两个表是员工表和部门表。

但由于某种原因，没有建立关系。

这是我的代码和错误。我做错了什么？

我想在员工表中有多个部门表。

如果我不在findAll中包含它，它可以正常工作。但是，包括它们会导致问题。

//

module.exports = function (sequelize, DataTypes) {    
    const department = sequelize.define('DEPT', {
        deptNo: {
            field: 'DEPTNO',
            type: DataTypes.INTEGER ,
            primaryKey: true ,
            autoIncrement: true
        },
        deptName: { 
            field: 'DEPTNAME',
            type: DataTypes.STRING(32)            
        },
        floor: { 
            field: 'FLOOR',
            type: DataTypes.INTEGER
        },
    }, {
            // don't use camelcase for automatically added attributes but underscore style
            // so updatedAt will be updated_at
            underscored: true,
            // disable the modification of tablenames; By default, sequelize will automatically
            // transform all passed model names (first parameter of define) into plural.
            // if you don't want that, set the following
            freezeTableName: true,
            // define the table's name

            tableName: 'DEPARTMENT'
        });

        department.associate = function (models){   
            department.belongsTo(models.EMP , {
                foreignkey : "empId"
            });
            
        };
    return department;
}




module.exports = function (sequelize, DataTypes) {    

    const employee = sequelize.define('EMP', {
        empNo: {
            field: 'EMPNO',
            type: DataTypes.INTEGER ,
            primaryKey: true ,
            autoIncrement: true
        },
        empName: { 
            field: 'EMPNAME',
            type: DataTypes.STRING(32)            
        },
        title: { 
            field: 'TITLE',
            type: DataTypes.STRING(32)     
        },
        dNo: {
            field: 'DNO',
            type: DataTypes.INTEGER            
        },
        salary: {
            field: 'SALARY',
            type: DataTypes.INTEGER
        }
    }, {
            // don't use camelcase for automatically added attributes but underscore style
            // so updatedAt will be updated_at
            underscored: true,
            // disable the modification of tablenames; By default, sequelize will automatically
            // transform all passed model names (first parameter of define) into plural.
            // if you don't want that, set the following
            freezeTableName: true,
            // define the table's name

            tableName: 'EMPLOYEE'
        });        
        
        employee.associations = function (models) {
            employee.hasMany(models.DEPT , {
                foreignkey : "empId"
            });
        };
    return employee;
}


router.get('/', function(req, res, next) {    
    models.EMP.findAll({
        include : [{model :models.DEPT}]
    })
    .then(results => {
        res.json(results);
     })
     .catch( err => {
         console.error(err);
     });
});

错误：SequelizeEagerLoadingError：DEPT与EMP无关！

Answer 1

你应该像这样：

const models = {};

glob.sync(path.join(__dirname, 'path to models e.g. **/*.js'))
  .forEach(file => {
    const model = sequelize.import(file);
    models[model.name] = model;
  });

Object.keys(models).forEach(model => {
  if (models[model].associate) {
    models[model].associate(models);
  }
});


export {models};