Question

我正在尝试使用$ addToSet将一个字符串数组添加到MongoDB。

对象设置如下定义：

var mongoose = require（'mongoose'）; var Schema = mongoose.Schema;

module.exports = mongoose.model('Company', {
    License: { type: String, index: true },
    "Classifications": [
        {
            Classification: { type: String, _id: false }
        }
    ]
});

当前对象在Mongo中如下所示：

{
    "_id": {
        "$oid": "55b03f9337b46f10d38843d7"
    },
    "Classifications": [
        "A - GENERAL ENGINEERING CONTRACTOR",
        "B - GENERAL BUILDING CONTRACTOR",
        "C12 - EARTHWORK AND PAVING"
    ],
    "License": "CA_*****"
}

我正在尝试在以下数组上运行$ addToSet：

var classifications = [ 'B - GENERAL BUILDING CONTRACTOR',
  'C10 - ELECTRICAL',
  'C33 - PAINTING AND DECORATING',
  'C29 - MASONRY',
  'C-9 - DRYWALL',
  'C54 - TILE (CERAMIC AND MOSAIC)',
  'C-5 - FRAMING AND ROUGH CARPENTRY',
  'C20 - WARM-AIR HEATING, VENTILATING AND AIR-CONDITIONING',
  'C36 - PLUMBING',
  'C39 - ROOFING' ]

Company.update({ '_id': company._id }, { $addToSet: { "Classifications": { $each: classifications } } }

当我在Node中运行Company.update时，我收到错误

[TypeError：无法使用'in'运算符在C39中搜索'_id' - ROOFING]

知道为什么会这样吗？

Answer 1

终于找到了我的问题。

在Schema中我有：

"Classifications": [
        {
            Classification: { type: String, _id: false }
        }
    ]

正在寻找一个带有String的对象。架构应该是：

"Classifications": [String]

允许

Company.update({ '_id': company._id }, { $addToSet: { "Classifications": { $each: classifications } } }

运行并添加数组中没有问题的字符串

使用$ addToSet和$ each，Mongo和Node JS

1 个答案: