如何使用 mongoose 查詢 mongo 文檔？

Question

MongoDB 文檔包含一個對象數組，如果我想從具有某個特定值的數組中查找並刪除 object，查詢這些文檔的最佳方法是什么；

這是文檔架構的示例

const mongoose = require("mongoose");

const LibrarySchema = new mongoose.Schema({
  user: {
    type: mongoose.Schema.Types.ObjectId,
    required: true,
  },
  books: [
    {
      type: new mongoose.Schema({
        bookName: {
          type: String,
          required: true,
        },
        chapterReading: {
          type: Number,
          default: 1,
          required: true,
        },
      }),
    },
  ],
});

const Library = mongoose.model("Library", LibrarySchema);

exports.Library = Library;

如果我想查找並刪除帶有某些 bookName 的書

Answer 1

使用$pull

例子：

Library.update({}, { $pull: { books: { bookName: "Yourbookname" } } })