Array Creation array in mongodb

Array Creation array in mongodb

Portfolio class has an array field named folders. when i create it using :
db.portfolio.insert(folders: [{"name"=>"Folder 1",
"stocks"=>[{"name"=>"stock name", "id"=>"stock id1", "qty"=>2},
{"name"=>"stock name", "id"=>"stock id2", "qty"=>1}]}, {"name"=>"Folder
2", "stocks"=>[{"name"=>"stock name", "id"=>"stock id3", "qty"=>2},
{"name"=>"stock name", "id"=>"stock id4", "qty"=>1}]}])
I got error that "SyntaxError: missing ) after argument list (shell):1".
Any guesses?