Case Insensitive search with $in

Question

How to search a column in a collection in mongodb with $in which includes an array of elements for search and also caseInsensitive matching of thos

Answer 1

Here is my case insensitive search (query) with multiple condition (regex) from data of array, I've used $in but it doesn't support case insensitive search.

Example Data

{ 
  name : "...Event A",
  tags : ["tag1", "tag2", "tag3", "tag4] 
},
{ 
  name : "...Event B",
  tags : ["tag3", "tag2"]
},
{ 
  name : "...Event C",
  tags : ["tag1", "tag4"]
},
{ 
  name : "...Event D",
  tags : ["tag2", "tag4"]
}

My query

db.event.find(
  { $or: //use $and or $or depends on your needs
    [ 
      { tags : { 
         $elemMatch : { $regex : '^tag1$', $options : 'i' }
        } 
      },
      { tags : { 
         $elemMatch : { $regex : '^tag3$', $options : 'i' }
        } 
      }
    ]
})