Sails.js模型关联问题

// User.js
module.exports = {
  attributes: {
    profile: {
      model: 'profile'
    }
  }
};

// Profile.js
module.exports = {
  attributes: {
    user: {
      model: 'user'
    }
  }
};

// Author.js
module.exports = {
  attributes: {
    articles: {
      collection: 'article',
      via: 'author'
    }
  }
};

// Article.js
module.exports = {
  attributes: {
    author: {
      model: 'author'
    }
  }
};

// Student.js
module.exports = {
  attributes: {
    courses: {
      collection: 'course',
      through: 'studentcourse'
    }
  }
};

// Course.js
module.exports = {
  attributes: {
    students: {
      collection: 'student',
      through: 'studentcourse'
    }
  }
};

// StudentCourse.js
module.exports = {
  attributes: {
    student: {
      model: 'student'
    },
    course: {
      model: 'course'
    }
  }
};

User.findOne({ id: userId }).populate('profile').exec((err, user) => {
  if (err) {
    console.error(err);
  } else {
    console.log(user.profile);
  }
});

Author.findOne({ id: authorId }).populate('articles').exec((err, author) => {
  if (err) {
    console.error(err);
  } else {
    console.log(author.articles);
  }
});