javascript - 获取 Mongoose UpdateMany 受影响文档的数量

Question

假设我们有代码:

 await Employees.updateMany(
        {
          InsertDate: {
            $gte: _yesterday,  // date ojbect that is passed as a param
            $lte: _today  // date ojbect that is passed as a param
          }
        },
        { $set: { RegistrationDate: ... // some var that I generate } }
      );

我们如何获得受影响文档的数量(计数)？

Answer 1

如 docs 中所述，您可以在响应的 nModified 字段中获取更新文档的数量。

所以你可以像这样访问它:

const response = await Employees.updateMany(
  {
    InsertDate: {
      $gte: _yesterday,  // date ojbect that is passed as a param
      $lte: _today  // date ojbect that is passed as a param
    }
  },
  { $set: { RegistrationDate: ... // some var that I generate } }
);

console.log("Number of updated documents: ", response.nModified);