count ( mdb-query-msg -- result )

Vocabulary

mongodb.driver

Inputs

mdb-query-msg

query

Outputs

result

number of objects in the collection that match the query

Word description

count objects in a collection

Definition

USING: accessors assocs kernel math mongodb.cmd
mongodb.connection ;

IN: mongodb.driver

: count ( mdb-query-msg -- result )
    [ count-cmd make-cmd ] dip
    [ collection>> "count" set-cmd-opt ]
    [ query>> "query" set-cmd-opt ] bi send-cmd
    [ check-ok nip ] keep [ [ "n" ] ] dip [ at >fixnum ] curry
    compose [ f ] if ;