在文档的数组字段中存在用于搜索一个或多个值的Mongo Query

Question

I have a collection like below

  {

  _id: ObjectId(),

  account_number: someID,

  account_context: {acnt_id:"1234",acnt_name:"Akhil",address:"Kadapa"},

  tags:["tag","TaG","User","tag2","usr"]

},

{

  _id: OBjectId(),

  account_number: someID,

  account_context: {acnt_id:"1234",acnt_name:"Akhil",address:"Kadapa"},

  tags:["gat","GaT","Hello","tag2","Usr"]

}

I would like to query based on tags. If I search for "tag" and "gat" , I should get both the documents If I search for "Tag" , I should get first document If I search for "tag" and "Hello", I should get both the documents.

Which means if the search field match for any one of the array element in the document I should get that document.

How can I get that?

Answer 1

you can use $elemMatch with $in for this problem like it:

var searchedArray = ["tag","Hello"]
collection.find({
    tags: {$elemMatch: {$in:searchedArray}}
}, (err, result)=>{

})

$elemMatch check all elements of an array with her expression. my expression is $in that check filed with all values is there in searchedArray if equal accept it.