将 .countDocuments 与 mongoDB 一起使用时出现类型错误

Question

我正在 YouTube 上学习一门课程。 YouTuber 编写了这段代码，并且似乎可以在他的机器上运行。但是当我复制到我的文件时，它给出了错误。我彻底地跟着他，所以到目前为止一切都很顺利。这是文件的代码。

import { Document, Model } from "mongoose";

interface MonthData {
    month: string;
    count: number;
};

export async function generateLast12MonthsData<T extends Document>(
    model: Model <T>
): Promise<{last12Months:MonthData[]}>{
    const last12Months:MonthData[] = [];
    const currentDate = new Date();
    currentDate.setDate(currentDate.getDate() + 1);

    for(let i=11; i>=0; i--){
        const endDate = new Date(
            currentDate.getFullYear(),
            currentDate.getMonth(),
            currentDate.getDate() - i * 28
        );

        const startDate = new Date(
            endDate.getFullYear(),
            endDate.getMonth(),
            endDate.getDate() - 28
        );

        const monthYear = endDate.toLocaleString(
            'default',
            {
                day: "numeric",
                month: "short",
                year: "numeric",
            }
        );

        const count = await model.countDocuments(
            {
                createdAt: {
                    $gte: startDate,
                    $lt: endDate,
                },
            }
        );


        last12Months.push(
            {
                month: monthYear,
                count,
            }
        )

    }
    return { last12Months };
}

这是完整的错误消息：

Argument of type '{ createdAt: { $gte: Date; $lt: Date; }; }' is not assignable to parameter of type 'FilterQuery<T>'.
  Type '{ createdAt: { $gte: Date; $lt: Date; }; }' is not assignable to type '{ [P in keyof T]?: Condition<T[P]> | undefined; }'.

Answer 1

您可以使用聚合代替旧方法 .countDocument，这在大多数情况下不推荐。

 collection.aggregate([
      // Include any `$match` stages to filter your documents as needed
      { $match: { /* your query conditions here */ } },
      // `$count` stage to get the number of documents
      { $count: "totalDocuments" }
    ])