importStudents.js

export function importStudents(req, res) {
  for (let student of STUDENTS) {
    const ids = [];

    let grade = {
      year: '2019',
      level: student.level,
      name: student.gradeName,
      turn: student.gradeTurn
    }

    Year.findOne(grade)
      .where('section')
      .eq(null)
      .exec()
    .then(year => {
      ids.push(year._id);

      Reflect.deleteProperty(grade, 'turn');

      return Year.findOne(grade)
        .where('sections')
        .eq(null)
        .where('turn')
        .eq(null)
        .exec()
      })
      .then(year => {
        ids.unshift(year._id);

        student.name = student.name;
        student.sections = ids;
        student.state = 'Visitante';
        student.contact = student.contact;
        student.history = {
          state: 'Visitante',
          user: req.params.id,
          date: new Date(),
          comment: 'Imported'
        }

        Student.create(student)
      })
    }
}