嵌套数组的猫鼬$或条件

Question

有我的架构

//ProjectModel
const ProjectSchema: Schema = new Schema(
 owner: { type: Schema.Types.ObjectId, ref: "User" },
 users: [{type: Schema.Types.ObjectId, ref: "ProjectUser", unique: true }]
);

//Project User model
const ProjectUserSchema = new Schema(
  {
    user: { type: Schema.Types.ObjectId, ref: "User", require: true },
    role: {
      type: String,
      default: 'basic',
      enum: ["basic", "projectuser", "moderator", "admin"]
    },
    project: { type: Schema.Types.ObjectId, ref: "Project", require: true },
  },
  {
    timestamps: true,
    usePushEach: true,
  }
);

User 模型具有常用字段，如密码、姓名等。

我想在 所有者 (UserSchema) 或 用户 (ProjectUserSchema) 中查找 ProjectModel 的用户强>

ProjectModel.findOne()
                    .or([{ owner: req.params.user }, { "users.user": req.params.user }])
                    .then(project => {
                        res.json(project);
                    });

但它返回 null。条件.or([{ owner: req.params.user }, { "users._id": "PROJECT USER ID" }]) 也不起作用。

我该怎么办？

Answer 1

您需要将传入的req.params.user 从字符串转换为ObjectId。试试这个：

const mongoose = require('mongoose');

const getProjectByUser = (req, res) => {
  let userId = mongoose.Types.ObjectId(req.params.user);

  ProjectModel
    .findOne({
      $or: [
        { "owner": userId },
        { "users": userId }
      ]
    })
    .then(project => {
      res.json(project);
    })
    .catch(e => {
      res.json({ error: "Error!" });
    });
}