[FIXED] How to find the count of users who doesn't have tasks in sequelize

Issue

How to find the count of users who doesn't have tasks in Sequelize.Users and Tasks are different models and Users hasMany Tasks( foreign key relation )

Solution

You can proceed following way within single sequelize query

UserModel.findAndCountAll({
        offset: 0,
        limit: 10,
        group: ["user.id"],
        includeIgnoreAttributes: false,
        include: [
            {
                model : TaskModel
            }
        ],
        attributes: [
            "id",
            [Sequelize.fn("COUNT", Sequelize.col("tasks.id")), "taskCount"]
        ],
        having: Sequelize.literal(`taskCount > 0`)
    })

This way you can get those users who has no tasks paginatedly and the results count property will hold the total number of such users who has no task.

Answered By - Ratul Sharker

Answer Checked By - Pedro (PHPFixing Volunteer)