没有关联键Mongodb的输出值

Question

when I do the following query

db.mycollection.aggregate({$sample: {size: 2}}, {$project: {"_id": 1,"text": 1}})

I get the following output

  "_id" : "123", "text" : "some writing"
  "_id" : "456", "text" : "some more writing"

I am looking for my output to be something like this

"123", "some writing"
"456", "some more writing"

Question:

Is there a way to output values ( "123" and "some writing" ) without the associated keys? ( "_id": and "text": )

Answer 1

db.mycollection.aggregate({$sample: {size: 2}},{$project: { myArray: [ "$id", "$text" ]}})

will do the job

You can read more here: https://docs.mongodb.com/v3.2/reference/operator/aggregation/project/#example-project-new-array-fields

UPDATE 1 : Updated syntax

Answer 2

I think this is with native MongoDB query syntax not possible. For an example on how to get this done with JavaScript have a look at the following StackOverflow post: How to return only value of a field in mongodb