Question

我的应用中有两个schemas。这些是：

培训师单一评分模式：

  trainerID: String,
  userID: String,
  rating: Number,
  review: String,
  addedOn: String,
};
const TrainerSingleRating = mongoose.model(
  "TrainerSingleRating",
  trainerSingleRating
);```

培训师评分架构：

  trainerID: String,
  averageRating: Number,
  ratings: [trainerSingleRating],
};
const TrainerRatings = mongoose.model("TrainerRatings", trainerRatings);```

我正在使用一个函数来更新和创建数据库中的文档。下面是我的函数的代码：

function saveTrainerRatings(trainerID, userID, ratings, review) {
  const date = moment().format("DD MMM YYYY");
  const trainerSingleRating = new TrainerSingleRating({
    trainerID: trainerID,
    userID: userID,
    rating: ratings,
    review: review,
    addedOn: date,
  });

  TrainerRatings.findOne({ trainerID: trainerID }, function (
    err,
    foundRatingList
  ) {
    const oldAverageRating = foundRatingList.averageRating;
    const newAverageRating = (oldAverageRating + parseInt(ratings)) / 2;
    const trainerRatings = new TrainerRatings({
      trainerID: trainerID,
      averageRating: ratings,
      ratings: [trainerSingleRating],
    });
    if (err) {
      console.log(err);
    } else {
      if (!foundRatingList) {
        trainerRatings.save();
      } else {
        const oldAverageRating = foundRatingList.averageRating;
        foundRatingList.ratings.push(trainerSingleRating);
        foundRatingList.averageRating.update(newAverageRating);
        foundRatingList.save();
      }
    }
  });
  trainerSingleRating.save();
}

因此，每次用户对培训师进行评分时，都会创建并保存新文档，并将新文档推入Trainer Rating模式中的评分数组中。

我需要根据所有评分来计算平均评分。目前，我正在尝试通过每次创建新文档时更新平均评分来解决此问题。但是问题是我在说foundRatingList.averageRating.update is not a function时出错。

如何解决此错误？还是有任何解决方法将新文档推送到rating array并同时更新averageRatings？

感谢前进

如何更新猫鼬模式中的字段以及模式内部数组中的新推送？

0 个答案: