find the document from sub array?

Question

I have a collection with documents that look like this:

\"awards\" : {
    \"oscars\" : [
        {\"award\": \"bestAnimatedFeature\", \"result\": \"won\"},
         


        

Answer 1

You need to use the dot notation to specify an exact match on the embedded document and use the $in operator to select those documents that won or were nominated for best picture

You shouldn't use the $or operator here because it will perform a collection scan if not all the clauses are supported by indexes as mention in the documentation.

db.my_collection.find({ 
    'awards.oscars.award': 'bestPicture', 
    'awards.oscars.result': { '$in': [ 'won', 'nominated' ] } 
} )

Answer 2

According to the MongoDB Query documentation, you can match a field in an embedded document within an array by concatenating its name to the name of the array like so:

db.my_collection.find(
  {
    'awards.oscars.award': 'bestPicture',
    $or: [
      { 'awards.oscars.result': 'won' },
      { 'awards.oscars.result': 'nominated' }
    ]
  }
)