Utilizing MongoDB arrays for efficient value retrieval within array attributes

I'm currently working with the code below:

// Defining my search array
var charArray=['a','b','c']

{
    name: 'object1',
    myChar: ['a','v','x']
}

{
    name: 'object2',
    myChar: ['f','h','y']
}

My goal is to retrieve the object that contains a specific value in its attribute.

I thought I could achieve this by doing the following:

db.getCollection('myObjects').find({
    'myChar':{
        $in:charArray
    }
})

However, the response turns out to be null. I also attempted using $elemMatch but it didn't work as expected.

db.getCollection('myObjects').find({
    'myChar':{
        $elemMatch: {$in: charArray}
    }
})

Answer №1

It appears there may have been a mistake as I was able to reproduce your scenario in my own MongoDB environment and the $elemMatch solution worked perfectly.

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