从数组中删除 ObjectId - MongoDB、Mongoose

Question

I am trying to delete a 'category' document and it's ObjectId that is in an array inside the 'menu' Schema. The 'menu' Schema looks like this:

categories: [
  {
    type: ObjectId,
    ref: "Category",
  },

it holds the ObjectId i am trying to delete

This is the nodejs code from the controller I try to run:

    const deletedCat = await Category.findByIdAndRemove(catId, function (err) {
  if (err) console.error(err)
})
const updateMenu = await Menu.findOneAndUpdate(
  { _id: menuId },
  { $pull: { categories: { _id: new ObjectId(catId) } } },
  { new: true }
)

the $pull doesn't change the DB and the ObjectId is still in the Array.

I also tried without the " new ObjectId "

What am I doing wrong?

Answer 1

Ok, so i just got it to work. The answer is simple, just use the ObjectId as a value of the key in the Array (name of the array)

const updateMenu = await Menu.findOneAndUpdate(
  { _id: menuId },
  { $pull: { categories: ObjectId(catId) } },
  { new: true }
)