function apichannelconver(){
[ "$1" ] && cnid=$1 || cnid=""
[ -z "$2" -o "$2" == "0" ] && daybefores=0 || shift && daybefores="$*"
startday=$(date -I)
local days
for daybefore in $daybefores
do
day=$(date -d "${daybefore} day ago" -I)
days+="'${day}',"
done
echo $days
days=${days%,*}
#days=${days#*,}
echo $days
echo apimongo --eval "var c=db.getSiblingDB('EventLog').getCollection('event').find({'channel_id':$cnid,'event_day':{\$in:[$days]},'event_type':'normal'});c.forEach( function(doc) { print(JSON.stringify(doc));});"
apimongo --eval "var c=db.getSiblingDB('EventLog').getCollection('event').find({'channel_id':$cnid,'event_day':{\$in:[$days]},'event_type':'normal'});c.forEach( function(doc) { print(JSON.stringify(doc));});" > conver_channel_id_${cnid}_${startday}_normal.txt
}
尤其注意 $in 这里需要对 $ 转义，我自已一直没发现需要转义，耽误了很久！！
