如何创建“对象数组的数组"Mongoose.js 中的架构 [英] How to create "array of arrays of objects" schema in Mongoose.js

问题描述

我需要为以下数据结构创建架构:

<代码>{...矩阵: [[{type: "A", count: 6}, {type: "B", count: 4}],[{type: "B", count: 1}, {type: "A", count: 2}, {type: "A", count: 1}],[{type: "C", count: 7}, {type: "A", count: 1}],]}

我在定义架构时尝试这样做，但导致验证错误:

const cellSchema = new mongoose.Schema({类型:字符串，计数:数量});const matrixSchema = new mongoose.Schema({...矩阵:[[cellSchema]]});

现在 Mongoose 似乎支持这种模式语法(

I need to create schema for following data structure:

{
  ...
  matrix: [
    [{type: "A", count: 6}, {type: "B", count: 4}],
    [{type: "B", count: 1}, {type: "A", count: 2}, {type: "A", count: 1}],
    [{type: "C", count: 7}, {type: "A", count: 1}],
  ]
}

I tried to do so like this while defining my schema, but it caused validation errors:

const cellSchema = new mongoose.Schema({
  type: String,
  count: Number
});

const matrixSchema = new mongoose.Schema({
  ...
  matrix: [[cellSchema]]
});

it seems that such a schema syntax is supported now in Mongoose (https://github.com/Automattic/mongoose/issues/1361).

解决方案

Sample code to create Array of arrays of object:

const cellSchema = new mongoose.Schema({
    type: String,
    count: Number
});

const matrixSchema = new mongoose.Schema({
    matrix: [[cellSchema]]
});

const Matrix = mongoose.model('Matrix', matrixSchema);

const newMatrix = new Matrix({
    matrix: [
        [{ type: 'xyz', count: 10 }, { type: 'ABC', count: 20 }],
        [{ type: 'pqr', count: 10 }]]
});
newMatrix.save();

Output

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