subquery Sequelize with nested query (include) - node.js

Question

I have this two models :
const Category = sequelize.define('Category', {
name: {
type: DataTypes.STRING,
unique: true
},
description: {
type: DataTypes.STRING,
},
status: {
type: DataTypes.BOOLEAN,
default: true
},
image: DataTypes.STRING,
}, {});
Category.associate = function (models) {
Category.hasMany(models.Product)
Category.hasMany(models.Category, { as: 'child', foreignKey: 'ParentId' });
Category.belongsTo(models.Category, { as: 'parent', foreignKey: 'ParentId' });
};
return Category;
const Product = sequelize.define('Product', {
name: { type: DataTypes.STRING, unique: true },
description: { type: DataTypes.STRING },
price: { type: DataTypes.INTEGER },
status: {
type: DataTypes.BOOLEAN,
default: true
},
image: DataTypes.STRING,
}, {});
Product.associate = function (models) {
Product.belongsTo(models.Category)
};
return Product;
nothing fancy here .my category model can has a CategoryId for nested purposes.so my question is is there a way I can have a subquery in Category model that select products with a related category Id?
Category.findAll({
limit: page_size,
where: {
ParentId: {
[sequelize.Op.eq]: null
}
},
include: [{
model: Category,
as: "child",
attributes: [
[sequelize.literal('(SELECT * FROM "Products" WHERE "CategoryId" = "child"."id")'),
'products'],
],
group: ['products']
}],
offset: offset_value,
order: [
['id', 'DESC'],
],
})
I tried to include and in the include section I need to query to my products that group it as a field.
p.s: if category instance has no CategoryId it will be considered as
Parent.
and I wrote this query and tested it comes with this error:
subquery must return only one column