如何在 mongoose 的查询中写入查询值

Question

I have an array in mongo document as below.

{
  company: [ 
    {name: "exist"}, 
    {name: "cool"},
    {name: "ho"}
  ]
}

And I want to get rid of a data in the array with position value.

So I made a query.

   await Company.findOneAndUpdate({
      _id: "xdef"
      },
      {
        $unset: {
           'company.1': 1
        }
      }
    })

It works very well. And now,I want to put position by query.

   await Company.findOneAndUpdate({
      _id: "xdef"
      },
      {
        $unset: {
           `company.{req.query.position}`: 1
        }
      }
    })

But it gives me an error. How can I make a code for this situation adequately?
Thank you so much for reading it.

Answer 1

You can use the computed property names . And you are missing $ also in the string literal.

 await Company.findOneAndUpdate({
    _id: "xdef"
  }, {
    $unset: {
      [`company.${req.query.position}`]: 1
    }
  }
})

With Computed Property Names you can use an expression that will be computed as a property name on an object.