Sequelize - 2 optional foreign key in a table - mysql

Question

There are 3 tables attendance_record, student, teacher with below relationship.
student(1) : attendance_record(Many) > studentId(foreign key)
teacher(1) : attendance_record(Many) > teacherId(foreign key)
When I create a attendance_record, the payload will be like this:
{
"studentId": "xxxxx",
"isAttended": true,
"date": 1625020428
}
It shows below error
Cannot add or update a child row: a foreign key constraint fails (`my_db`.`attendance_record`, CONSTRAINT `attendance_record_ibfk_34` FOREIGN KEY (`teacherId`) REFERENCES `teacher` (`id`) ON DELETE CASCADE O)
I know it's because of I do not include teacherId in the payload, but I want it to be optional(only studentId OR teacherId in payload).
How am I suppose to do it
attendance-record.model.js
const Sequelize = require('sequelize');
const DataTypes = Sequelize.DataTypes;
module.exports = function (app) {
const sequelizeClient = app.get('sequelizeClient');
const attendanceRecord = sequelizeClient.define('attendance_record', {
id: {
allowNull: false,
primaryKey: true,
type: DataTypes.UUID,
defaultValue: Sequelize.UUIDV4,
},
studentId: {
allowNull: false,
type: DataTypes.UUID,
references: { model: 'student', key: 'id' },
defaultValue: Sequelize.UUIDV4,
unique: 'studentId_foreign_idx'
},
teacherId: {
allowNull: false,
type: DataTypes.UUID,
references: { model: 'teacher', key: 'id' },
defaultValue: Sequelize.UUIDV4,
unique: 'teacherId_foreign_idx'
},
isAttended: {
type: DataTypes.BOOLEAN,
},
date:{
type: DataTypes.DATE,
},
}, {
hooks: {
beforeCount(options) {
options.raw = true;
}
}
});
// eslint-disable-next-line no-unused-vars
attendanceRecord.associate = function (models) {
attendanceRecord.belongsTo(models.student,{
as: 'students',
foreignKey: 'studentId'
});
attendanceRecord.belongsTo(models.teacher, {
as: 'teachers',
foreignKey: 'teacherId'
});
};
return attendanceRecord;
};
student.model.js
// See http://docs.sequelizejs.com/en/latest/docs/models-definition/
// for more of what you can do here.
const Sequelize = require('sequelize');
const DataTypes = Sequelize.DataTypes;
module.exports = function (app) {
const sequelizeClient = app.get('sequelizeClient');
const student = sequelizeClient.define('student', {
id: {
allowNull: false,
primaryKey: true,
type: DataTypes.UUID,
defaultValue: Sequelize.UUIDV4,
},
email: {
type: DataTypes.STRING,
allowNull: false,
isEmail: true,
unique: 'email'
},
firstName:{
type: DataTypes.STRING,
allowNull: false,
defaultValue: '',
},
lastName:{
type: DataTypes.STRING,
allowNull: false,
defaultValue: '',
}
}, {
hooks: {
beforeCount(options) {
options.raw = true;
}
}
});
// eslint-disable-next-line no-unused-vars
student.associate = function (models) {
student.hasMany(models.attendance_record,{
foreignKey: 'studentId'
});
};
return student;
};
teacher.model.js
// See http://docs.sequelizejs.com/en/latest/docs/models-definition/
// for more of what you can do here.
const Sequelize = require('sequelize');
const DataTypes = Sequelize.DataTypes;
module.exports = function (app) {
const sequelizeClient = app.get('sequelizeClient');
const teacher = sequelizeClient.define('teacher', {
id: {
allowNull: false,
primaryKey: true,
type: DataTypes.UUID,
defaultValue: Sequelize.UUIDV4,
},
email: {
type: DataTypes.STRING,
allowNull: false,
}
}, {
hooks: {
beforeCount(options) {
options.raw = true;
}
}
});
// eslint-disable-next-line no-unused-vars
teacher.associate = function (models) {
teacher.hasMany(models.attendance_record,{
foreignKey: 'teacherId'
})
};
return teacher;
};