Match array elements/element (at least one) from another array in mongoose

Question

Lets say in my database :

{
  domains:[A, B, C],
  id: 1
},
{
  domains:[B, C],
  id: 2
},
{
  domains:[A],
  id: 3
},
{
  domains:[B, D],
  id: 4
}

I want to search query like domains: [A, D]. Basically i want to match at least one element not for all element.

My expecting answer is

{
  domains:[A, B, C],
  id: 1
},
{
  domains:[A],
  id: 3
},
{
  domains:[B, D],
  id: 4
}

Cause A and D(at least one) are found into this objects.

I want to retrieve questions, which matches the at least one topics?

J.F. · Accepted Answer · 2021-04-19 22:41:54Z

4

You can use $in operator in this way:

yourModel.find({
  "domains": {
    "$in": [
      "A",
      "D"
    ]
  }
})

Example here

answered Apr 19, 2021 at 22:41

J.F.

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2 Comments

Works well. Thanks a lot J.F.

J.F. I updated my question. I added a second question.Can you answer the question?