Sequelize Count and Group Nested Include - sql

Question

I have got a few sql tables as
export default (sequelize, Sequelize) => {
return sequelize.define('teacher', {
tagline: {
type: Sequelize.TEXT,
},
modeOfPayment: {
type: Sequelize.STRING,
},
modeOfSession: {
type: Sequelize.STRING,
},
preferredTimeZones: {
type: Sequelize.STRING,
},
titleForSessions: {
type: Sequelize.STRING,
},
availableForWork: {
type: Sequelize.BOOLEAN,
},
});
};
export default (sequelize, Sequelize) => {
return sequelize.define('skill', {
name: {
type: Sequelize.STRING,
unique: true,
allowNull: false,
},
});
};
export default (sequelize, Sequelize) => {
return sequelize.define('category', {
name: {
type: Sequelize.STRING,
unique: true,
allowNull: false,
},
});
};
Here is the model relation between them
Teacher.belongsToMany(Skill, {
through: 'skill_teacher',
});
Skill.belongsToMany(Teacher, {
through: 'skill_teacher',
});
Category.hasMany(Skill);
Skill.belongsTo(Category);
Earlier I needed to query count of teachers in each skill, here's my controller for that
// #desc Get skill count for each skill
// #route GET /api/skills/count
// #access Public
const getSkillCount = asyncHandler(async (req, res) => {
try {
const skills = await Skill.findAll({
attributes: [
'id',
'name',
[sequelize.fn('count', sequelize.col('teachers.id')), 'teacherCount'],
],
include: [{ attributes: [], model: Teacher }],
group: ['skill.id'],
});
res.json(skills);
} catch (err) {
console.log(err.message);
res.status(500);
throw new Error(err.message);
}
});
Now, the skills are grouped in categories. So I wanna query a list of skills having their own teacher count grouped in their own categories, which category also having a skillCount column. I tried this but it is not giving my desired results
// #desc Get category and their skills counts
// #route GET /api/categories/skills/count
// #access Public
const getCategorySkillCounts = asyncHandler(async (req, res) => {
try {
const categories = await Category.findAll({
attributes: [
'id',
'name',
[sequelize.fn('count', sequelize.col('skills.id')), 'skillCount'],
],
include: {
model: Skill,
include: [{ model: Teacher }],
attributes: [
'id',
'name',
[sequelize.fn('count', sequelize.col('teachers.id')), 'teacherCount'],
],
group: ['skill.id'],
},
group: ['category.id'],
});
res.json(categories);
} catch (err) {
console.log(err.message);
res.status(500);
throw new Error(err.message);
}
});