Question 287342 in Jquery Question posted in
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Jquery – How to select one item of array in Mongodb?

The data model is something like this:

"_id":...
"special_offers": [ 0 => Object, 1 => Object, ...]

I just need to get 0 => Object, I mean, the first item of the special_offers array.

Here is what I’ve tried:

enter image description here

But as you can see, all items of the array are visible in the result. Any idea how can I get that?

Tags:

2

Answers


  2. 0

    If you know the _id value of the first element then you can do:

    db.collection.find({
   special_offers: {
      $elemMatch: {
         _id: ObjectId('6349770ba47302dd542518fa')
      }
   }
},{ 'special_offers.$':1 }
);

    Or if you only know the _id of the parent document then you can do:

    db.collection.find({_id: ObjectId('650ecb0f507561a33ce927aa')},
{ 
   special_offers: {
      $first: "$special_offers"
   }
});
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