Mongoos `findOneAndUpdate` 返回 `QueryWithHelpers` 而不是结果

Question

I have the following invocation.

  static findOneAndUpdate(
    filter: FilterQuery<ISyncedOrder>,
    update: UpdateQuery<ISyncedOrder>
  ): Promise<ISyncedOrder> {
    return SyncedOrders.findOneAndUpdate(
      filter,
      update,
      {upsert: true}
    );
  }

According to documents, I should be getting a document. But, IDE shows an error of a type mismatch (screenshot below).

When I checked the node module, I see the following signature for the method findOneAndUpdate .

What am I missing? Looks like I am headed in a wrong direction.

Answer 1

The issue occurs because "Mongoose queries are not promises" .

They support just enough to be used as one (it's a "thenable" ), but not enough to fool TypeScript into believing it's actually a promise.

The Mongoose documentation also suggests how to get a real promise: by using Query.exec() :

return SyncedOrders.findOneAndUpdate(
  filter,
  update,
  {upsert: true}
).exec();