Collectives™ on Stack Overflow
Find centralized, trusted content and collaborate around the technologies you use most.
Learn more about Collectives
Teams
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
Learn more about Teams
I'm trying to use a $facet stage of a aggregate pipeline to match and group documents, but I suspect my syntax is out.
Could anybody tell me what's wrong with this please? Keep getting the message "A Pipeline stage specification object must contain exact one field".
'$match': {
'Id': 59
'$unwind': {
'path': '$Vehicles'
// It's this stage that's playing up.
'$facet': {
'Offers': [
'$match': { 'Vehicles.VehicleGrouping': 'OOTW' },
'$group': {
'_id': '$Vehicles.Manufacturer',
'count': { '$sum': 1 }
// End of problematic stage.
Thanks.
Thanks for contributing an answer to Stack Overflow!
-
Please be sure to
answer the question
. Provide details and share your research!
But
avoid
…
-
Asking for help, clarification, or responding to other answers.
-
Making statements based on opinion; back them up with references or personal experience.
To learn more, see our
tips on writing great answers
.
