Question

我在更新UserModel子文档时出现问题(OfferModel)

const user = Schema({
  name: String,
  offers: [{
    type: mongoose.Schema.Types.ObjectId,
    ref: 'Offer'
  }]
});

const offer = Schema({
  title: String,
  post: {
    type: mongoose.Schema.Types.ObjectId,
    ref: 'Post'
  },
  buyer: {
    deal: String,
    user: {
      type: mongoose.Schema.Types.ObjectId,
      ref: 'User'
    }
  },
  seller: {
    deal: String,
    user: {
      type: mongoose.Schema.Types.ObjectId,
      ref: 'User'
    }
  }
});

所以这就是情况我有一个用户在1个帖子上有3个优惠，但总共有10个优惠

Post A = 3 offers.
Post B = 7 offers.

然后我在帖子A上接受了一个提议，所以我查询数据库并将“买方”下的“交易”属性设置为“确定”，这没有问题。现在我需要将“拒绝”设置为帖子A上的其他2个优惠。如果我使用Javascript方式，有一个解决方案：

获取帖子ID
在用户模型下填充优惠，使用匹配运算符仅获取特定帖子和优惠的优惠。尚未确认（这是2个优惠）
遍历它们并只分配user.offers.buyer.deal = "rejected"
保存（）

用这种方法很好，但我想用Mongoose方式做，我只是想知道我怎么能以猫鼬的方式做到这一点？

我还检查了.update()运算符，但我似乎无法使其正常工作，或者这不是我需要的东西。

关于如何仅使用Mongoose运算符来更新这两个优惠的任何输入？

谢谢

**更新

const user = await this.userRepo.findUser(req.user._id)
  .select('offers')
  .populate({
    path: 'offers',
    match: {
      post: req.body.postId,
      'buyer.feedback': 'none'
    }
  })
  .update({}, {
    '$set': {
      'offers.$.buyer.feedback': 'ok'
    }
  });

错误CastError : Cast to ObjectId failed for value "ok" at path "offers"

***更新2个示例文档 ****在

// John
{
  "_id": ObjectId("5abf3c2fb9709a31244ee2a8"),
  "name": "john",
  "offers": [
    ObjectId("5ad2aac1b0ef21131439223c"), // Offer that i accepted
    ObjectId("5ad2ab39b0ef21131439223d"), // Offer i should reject
    ObjectId("5ad2b9b2751c39321c4173e4"), // Offer i should reject
    ObjectId("5ad2d0846778d91eb0b109a8"),
    ObjectId("5ad2d136e50e903240cdb4b9"),
    ObjectId("5ad2d14ae50e903240cdb4ba"),
    ObjectId("5ad2d2acde95b51e205b26fc"),
    ObjectId("5ad9cbaec9c10314148adcd8"),
    ObjectId("5ad9ccf60c7f492940d4bd9d"),
    ObjectId("5ad9cd2e0c7f492940d4bd9e"),
  ],
  "post": [
    ObjectId("5abf4eb433063a3ebc8ba78f"), // Post A
    ObjectId("5abf4ec533063a3ebc8ba790"),
  ]
};

// Offer that i accepted
{
  "_id" : ObjectId("5ad2aac1b0ef21131439223c"),
    "buyer" : {
      "deal" : "ok",
      "feedback" : "none",
      "user" : ObjectId("5abf3c2fb9709a31244ee2a8")
  },
  "seller" : {
    "deal" : "none",
    "feedback" : "none",
    "user" : ObjectId("5abf3c2fb9709a31244ee8bf")
  },
  "post" : ObjectId("5abf4eb433063a3ebc8ba78f"),
}

// (BEFORE) Offer that i should reject
[{
  "_id" : ObjectId("5ad2ab39b0ef21131439223d"),
  "buyer" : {
    "deal" : "none",
    "feedback" : "none",
    "user" : ObjectId("5abf3c2fb9709a31244ee2a8")
  },
  "seller" : {
    "deal" : "none",
    "feedback" : "none",
    "user" : ObjectId("5abf3c2fb9709a31244ee8bd")
  },
  "post" : ObjectId("5abf4eb433063a3ebc8ba78f"),
},
{
  "_id": ObjectId("5ad2b9b2751c39321c4173e4"),
  "buyer": {
    "deal": "none",
    "feedback": "none",
    "user": ObjectId("5abf3c2fb9709a31244ee2a8")
    },
  "seller": {
    "deal": "none",
    "feedback": "none",
    "user": ObjectId("5abf3c2fb9709a31244ee8aa")
    },
  "post": ObjectId("5abf4eb433063a3ebc8ba78f"),
}]

// (AFTER)
[{
  "_id": ObjectId("5ad2ab39b0ef21131439223d"),
  "buyer": {
    "deal": "rejected",
    "feedback": "none",
    "user": ObjectId("5abf3c2fb9709a31244ee2a8")
  },
  "seller": {
    "deal": "none",
    "feedback": "none",
    "user": ObjectId("5abf3c2fb9709a31244ee8bd")
  },
  "post": ObjectId("5abf4eb433063a3ebc8ba78f"),
},
  {
    "_id": ObjectId("5ad2b9b2751c39321c4173e4"),
    "buyer": {
      "deal": "rejected",
      "feedback": "none",
      "user": ObjectId("5abf3c2fb9709a31244ee2a8")
    },
    "seller": {
      "deal": "none",
      "feedback": "none",
      "user": ObjectId("5abf3c2fb9709a31244ee8aa")
    },
    "post": ObjectId("5abf4eb433063a3ebc8ba78f"),
  }]

Answer 1

你应该尝试这样的事情

Offers.update({
  "buyer.feedback": "none",  
  post: req.body.postId      //query
}, {
  '$set': {
    'buyer.feedback': 'ok'    // update operation
  }
})

Mongoose用条件填充subdocs并更新它们

1 个答案: