Mongoose 用数组填充不起作用

Question

嘿，所以我试图用 trainee.name 填充会议，这不起作用，并到达 try catch 块中的 catch 并返回 500。（使用 fastify+mongoose）

模型/会议.ts

    import uniqueValidator from 'mongoose-unique-validator';
    import { Schema, Types, model } from 'mongoose';
    
    interface MeetingType {
      _id: Types.ObjectId;
      coach: Types.ObjectId;
      trainees: Types.ObjectId[];
    }
    
    const meetingSchema = new Schema({
      coach: { type: Types.ObjectId, required: true, ref: 'Coach' },
      trainees: [{ type: Types.ObjectId, required: true, ref: 'Trainee' }],
not relevant info about meeting..

    });
    
    meetingSchema.plugin(uniqueValidator);
    
    const Meeting = model('meeting', meetingSchema);
    
    export default Meeting;
    
    export type { MeetingType };

模型/trainee.ts

import uniqueValidator from 'mongoose-unique-validator';
import { Schema, Types, model } from 'mongoose';

interface TraineeType {
trainee's interface...
}

const traineeSchema = new Schema({
  name: { type: String, required: true },
  email: { type: String, required: true, unique: true, match: /@/ },
  meetings: [{ type: Types.ObjectId, required: true, ref: 'Meeting' }],
  activeCoachDetails: {
    activeCoach: { type: Types.ObjectId, ref: 'Coach' },
    startDateCoach: { type: Date },
  },
not relevant info about trainee..
});

traineeSchema.plugin(uniqueValidator);

const Trainee = model('trainee', traineeSchema);

export default Trainee;

export type { TraineeType };

我有待处理的会议功能，可以正确发送会议，但是当我尝试添加填充时，它会发送 500 并崩溃以捕获块。无需填充即可工作。我想填充返回 trainee.name

控制器.ts

const getPendingApprovalMeetings = async (
  request: any,
  reply: FastifyReply,
) => {
  const { coachId }: { coachId: string } = request.user;
  const { page, limit }: { page: number; limit: number } = request.query;
  let coach: CoachType | null;
  try {
    coach = await Coach.findById(coachId);
  } catch (err: Error | any) {
    logger.error(`can't get coach by his id: ${err.message} - ${coachId}`);
    return await reply
      .status(500)
      .send('Getting meetings failed, please try again.');
  }

  if (!coach) {
    logger.error(`didn't find coach by his id - ${coachId}`);
    return await reply
      .status(404)
      .send('Could not find coach for provided id.');
  }

  let pendingApprovalMeetings = [];
  try {
    pendingApprovalMeetings = await Meeting.find(
      {
        _id: { $in: coach.meetings },
        status: 'Waiting for approval',
      },
      {},
      {
        skip: (page - 1) * limit,
        limit,
      },
    )
      .populate({
        path: 'trainee',
        select: 'name',
      })
  } catch (err: Error | any) {
    logger.error(`can't get pending approval meetings - ${coachId}`, err);
    return await reply
      .status(500)
      .send('Getting pending approval meetings failed, please try again.');
  }

  return await reply.status(200).send({
    meetings: pendingApprovalMeetings,
  });
};

Answer 1

首先，您可以看到以下调用记录的错误。

logger.error(`can't get pending approval meetings - ${coachId}`, err);

其次，有一个错别字。

模型会议有一个路径“受训者”，在填充时它被称为“受训者”。漏掉了“s”这个字符。

 .populate({
        path: 'trainee',
        select: 'name',
      })

请更正为

 .populate({
        path: 'trainees',
        select: 'name',
      })

最后，在检查记录的错误时，您可能会看到类似于以下内容的错误消息：

StrictPopulateError: Cannot populate path `xxxx` because it is not in your schema. Set the `strictPopulate` option to false to override.
    at getModelsMapForPopulate ....