{
"beer_name" : "Crazy Goat",
"brewery_name" : "Lilleys",
"beer_type" : "Cider",
"beer_abv" : 6.8,
"beer_ibu" : 0,
"brewery_country" : "England"
}
{ $project: {
beer: { *$concat: [*
* '$beer_name',*
* ' (',*
* '$beer_type'*
* ')',*
* ]* },
'country': *'$brewery_country'*
} }
{
"_id" : ObjectId("5400a24f44670a01098b4657"),
"beer" : "Grazy Goat (Cider)",
"country" : "England"
},