How to get a distinct count with sequelize?

Question

I am trying to get a distinct count of a particular column using sequelize. My initial attempt is using the \'count\' method of my model, however it doesn\'t look like this is

Answer 1

The Sequelize documentation on count links to a count method that doesn't let you specify which column to get the count of distinct values:

Model.prototype.count = function(options) {
  options = Utils._.clone(options || {});
  conformOptions(options, this);
  Model.$injectScope(this.$scope, options);
  var col = '*';
  if (options.include) {
    col = this.name + '.' + this.primaryKeyField;
    expandIncludeAll.call(this, options);
    validateIncludedElements.call(this, options);
  }
  Utils.mapOptionFieldNames(options, this);
  options.plain = options.group ? false : true;
  options.dataType = new DataTypes.INTEGER();
  options.includeIgnoreAttributes = false;
  options.limit = null;
  options.offset = null;
  options.order = null;
  return this.aggregate(col, 'count', options);
};

Basically SELECT COUNT(DISTINCT(*)) or SELECT COUNT(DISTINCT(primaryKey)) if you've got a primary key defined.

To do the Sequelize equivalent of SELECT category, COUNT(DISTINCT(product)) as 'countOfProducts' GROUP BY category, you'd do:

model.findAll({
  attributes: [
    'category',
    [Sequelize.literal('COUNT(DISTINCT(product))'), 'countOfProducts']
  ],
  group: 'category'
})