onDelete cascade not working on "one to one" - Sequelize.js - mysql

Question

My category table has a foreign key: name_id which is referenced to id of translation table, now category and translation have one to one relationship.
I would like to add a onDelete CASCADE so when I delete category the translation would also be deleted.
const Translation = sequelize.define('Translation',
{
id: {
type: DataTypes.INTEGER,
allowNull: false,
primaryKey: true,
autoIncrement: true
},
en: DataTypes.STRING(1000),
es: DataTypes.STRING(1000),
pt: DataTypes.STRING(1000)
}
)
const Category = sequelize.define('Category',
{
id: {
type: DataTypes.INTEGER,
allowNull: false,
primaryKey: true,
autoIncrement: true
},
nameId: DataTypes.INTEGER
}
)
Category.belongsTo(Translation, { as: 'name', foreignKey: 'nameId', onDelete: 'cascade' })
Translation.hasOne(Category, { foreignKey: 'nameId', onDelete: 'cascade' })
Is there something I am missing?
P.S. other tables will also be related to translations, that´s why foreign key is placed in category and not the other way around.

Answer 1

Your association is on the wrong side! With such association definition, you will get the following scheme:
+----------+
| Category |
+----------+
| id |
+----------+
| nameId |
+----------+
+-------------+
| Translation |
+-------------+
| id |
+-------------+
| en |
+-------------+
| es |
+-------------+
| pt |
+-------------+
| nameId | <-- references Category.id
+-------------+
Therefore, your cascade is working, but it will delete orphaned Categories when a Translation is dropped. To achieve what you seek, you must define your association like so:
Category.hasOne(Translation, { as: 'name', foreignKey: 'nameId', onDelete: 'cascade' })
Translation.belongsTo(Category, { foreignKey: 'nameId', onDelete: 'cascade' })
Edit: If you have multiple tables with translations, you need to drop the belongTo associations. You will only have the hasOne on each of these tables, ex:
Category.hasOne(Translation, { as: 'name', foreignKey: 'nameId', onDelete: 'cascade' });
Event.hasOne(Translation, { as: 'description', foreignKey: 'descriptionId', onDelete: 'cascade' });