How to count a group by query in NodeJS Sequelize

Question

In Rails I can perform a simple ORM query for the number of Likes a model has:

    @records = Model
        .select( \'model.*\' )
        .select( \'count(likes         


        

Answer 1

This sequelize github issue looks totally like your case:

User.findAll({
  attributes: ['User.*', 'Post.*', [sequelize.fn('COUNT', 'Post.id'), 'PostCount']],
  include: [Post]
});

Answer 2

To resolve this problem we Need to upgrade to latest version of sequelize and include raw = true, Here is How I had done after lot of iteration and off-course googling.

 getUserProjectCount: function (req, res) {
        Project.findAll(
            {
                attributes: ['User.username', [sequelize.fn('COUNT', sequelize.col('Project.id')), 'ProjectCount']],
                include: [
                    {
                        model: User,
                        attributes: [],
                        include: []
                    }
                ],
                group: ['User.username'],
                raw:true
            }
        ).then(function (projects) {
            res.send(projects);
        });
    }

where my reference models are

//user
var User = sequelize.define("User", {
    username: Sequelize.STRING,
    password: Sequelize.STRING
});

//project
var Project = sequelize.define("Project", {
    name: Sequelize.STRING,
    UserId:{
         type:Sequelize.INTEGER,
         references: {
                 model: User,
                  key: "id"
         }
    }
});

Project.belongsTo(User);
User.hasMany(Project);

after migration ORM create 'Users' & 'Projects' table into my postgres server. Here is SQL Query by ORM

SELECT 
  "User"."username", COUNT("Project"."id") AS "ProjectCount" 
 FROM 
    "Projects" AS "Project" 
    LEFT OUTER JOIN "Users" AS "User" ON "Project"."UserId" = "User"."id" 
 GROUP BY 
   "User"."username";