NodeJs + Sequelize + Express extra association key addedwhen query-ing - node.js

Question

I have 2 tables: Countries and Spots. A country can have many spots and a spot belongs to one country.
I have generated the migrations necessary with sequelize for the 2 tables:
Countries.js
'use strict';
module.exports = {
up: (queryInterface, Sequelize) => {
return queryInterface.createTable('Countries', {
id: {
allowNull: false,
autoIncrement: true,
primaryKey: true,
type: Sequelize.INTEGER
},
name: {
allowNull: false,
unique: true,
type: Sequelize.STRING
},
createdAt: {
allowNull: false,
defaultValue: Sequelize.literal('NOW()'),
type: Sequelize.DATE,
},
updatedAt: {
allowNull: false,
defaultValue: Sequelize.literal('NOW()'),
type: Sequelize.DATE
}
});
},
down: (queryInterface, Sequelize) => {
return queryInterface.dropTable('Countries');
}
};
Spots.js
'use strict';
module.exports = {
up: (queryInterface, Sequelize) => {
return queryInterface.createTable('Spots', {
id: {
allowNull: false,
autoIncrement: true,
primaryKey: true,
type: Sequelize.INTEGER
},
name: {
allowNull: false,
type: Sequelize.STRING
},
wind: {
type: Sequelize.FLOAT
},
country_id: {
type: Sequelize.INTEGER,
references: {
model: 'Countries', // name of Target table
key: 'id', // key in Target table that we're referencing
},
onDelete: 'CASCADE',
},
createdAt: {
allowNull: false,
defaultValue: Sequelize.literal('NOW()'),
type: Sequelize.DATE
},
updatedAt: {
allowNull: false,
defaultValue: Sequelize.literal('NOW()'),
type: Sequelize.DATE
}
});
},
down: (queryInterface, Sequelize) => {
return queryInterface.dropTable('Spots');
}
};
Everything works ok. I define some routes and some controllers and I try to do Spots.findAll() in my controller
const models = require('../models/index')
const Spot = models.Spot
exports.index = async (req, res, next) => {
const spots = await Spot.findAll()
res.status(200).json(spots)
}
However the query Spot.findAll() tries to ask for CountryId which is a key that obviously doesn't exist and I do not wish for it to exist.
Executing (default): SELECT `id`, `name`, `wind`, `country_id`, `createdAt`, `updatedAt`, `CountryId` FROM `Spots` AS `Spot`;
(node:13027) UnhandledPromiseRejectionWarning: SequelizeDatabaseError: Unknown column 'CountryId' in 'field list'
These are the spot and countries models:
Country.js
'use strict';
module.exports = (sequelize, DataTypes) => {
const Country = sequelize.define('Country', {
name: DataTypes.STRING
}, {});
Country.associate = function(models) {
// associations can be defined here
Country.hasMany(models.Spot)
};
return Country;
};
Spot.js
'use strict';
module.exports = (sequelize, DataTypes) => {
const Spot = sequelize.define('Spot', {
name: DataTypes.STRING,
wind: DataTypes.FLOAT,
country_id: DataTypes.INTEGER
}, {});
Spot.associate = function(models) {
// associations can be defined here
Spot.belongsTo(models.Country, {
foreignKey: 'country_id'
});
Spot.hasMany(models.Favorite)
};
return Spot;
};
I added the foreign_key attribute to belongs_to as I thought that the error surely comes from the associations(I still think it does).
Why does it happen and how to fix it?

Answer 1

The problem is because you are mixing everything here please follow one convention either camelCase or snack_case.
Write country_id as countryId and change your table names to lowercase and you will good to go.