Sequelize - 如何从非db模型创建查询？

Question

我想创建一个使用Sequelize的DSL返回非db模型的查询。我写了 raw 查询，如下所示：

instanceMethods: {
  getHoursReport: function({from, to, companies}) {
    let currentDate = new Date();

    from = from || new Date(
      currentDate.getFullYear(),
      currentDate.getMonth(),
      1
    );

    to = to || new Date(
      currentDate.getFullYear(),
      currentDate.getMonth() + 1,
      0
    );

    let fromString = from.toISOString();
    let toString   = to.toISOString();

    let companiesFilter = 'true';

    if (typeof companies !== 'undefined' && companies.length > 0) {
      companiesFilter = `c.id IN ('${companies.join("','")}')`;
    }

    // @todo: Use Sequelize DSL to make the query
    const query = `
      SELECT p.id as contractor,
             string_agg(DISTINCT pr.name, ';') as projects,
             round(sum(te.hours), 2) as "totalHours",
             round(sum(te.hours * te.rate), 2) as "totalPay"
        FROM person_company_roles pcr
        JOIN companies c
          ON pcr."companyId" = c.id
        JOIN projects pr
          ON pr."clientId" = c.id
        JOIN project_timesheets pt
          ON pt."projectId" = pr.id
        JOIN timesheet_entries te
          ON pt.id = te."timesheetId"
        JOIN people p
          ON p.id = pt."contractorId"
        WHERE pcr."personId" = '${this.id}' AND
              pcr.role = 'owner' AND
              te."entryDate"::date BETWEEN
              '${fromString}'::date AND '${toString}'::date AND
              ${companiesFilter}
        GROUP BY p.id;
      `;

    return sequelize.query(query, {
      model: sequelize.models.hoursReport
    }).then(
      report => report[0]
    );
  }
}

在Sequelize docs中，查询是从模型构建的。所以，我不明白如何从 hoursReport 模型中创建查询。

任何帮助将不胜感激。

提前致谢