我们可以在mongo中使用哪种字段类型存储对象数组？

Question

我们可以在mongo中使用哪种字段类型来存储对象数组？我想在下面存储数据。我在下面实现了我，并且我添加了代码，也许您可​​以以某种方式对其进行检查，并让我知道发生问题或错误的部分在哪里。我还提供了示例数据。当前实现的问题是它不会将datas中的books数组中的数据保存为0个元素

样本数据

{
    "books":
              [
                {
                    "title": "Professional JavaScript",
                    "authors": [
                        "Nicholas C. Zakas"
                    ],
                    "edition": 3,
                    "year": 2011
                },
                {
                    "title": "Professional JavaScript",
                    "authors": [
                        "Nicholas C.Zakas"
                    ],
                    "edition": 2,
                    "year": 2009
                }

              ]
}

#implementation


const schema = new Schema({
    books: [{ type: mongoose.Schema.Types.Mixed }]

  })


var RouterData = mongoose.model('RouterData', schema);

var routerData = {
    "books":
              [
                {
                    "title": "Professional JavaScript",
                    "authors": [
                        "Nicholas C. Zakas"
                    ],
                    "edition": 3,
                    "year": 2011
                },
                {
                    "title": "Professional JavaScript",
                    "authors": [
                        "Nicholas C.Zakas"
                    ],
                    "edition": 2,
                    "year": 2009
                }

              ]
}

var data = new RouterData({routerData: routerData});
data.save();

Answer 1

我认为您可以像这样定义架构。

const booksSchema = new Schema({
  books: [{
    title: String,
    authors: [String],
    edition: Number,
    year: { type: Date }
  }]
})

Answer 2

用猫鼬定义您的架构，如下所示：

 componentDidMount() {
    const { location } = this.props;

    if (location.state) {
      this.setState({ data: location.state.data });
    }
  }

Answer 3

如果您使用猫鼬，那么您应该按照自己的模式进行操作

books: [{ type: mongoose.Schema.Types.Mixed }]

mixed表示它可以接受任何对象，数组等。您可以检查https://mongoosejs.com/docs/schematypes.html#mixed

Answer 4

这应该有效：

const mongoose = require('mongoose');

const BookSchema = new mongoose.Schema({
  title: { type: String },
  authors: [String],
  edition: { type: Number },
  year: { type: Number },
});

const MySchema = new mongoose.Schema({
  books: [BookSchema],
});

module.exports = mongoose.model('MySchema', MySchema);