Exportar todas as coleções de um Mongo DB para CSVs (trocar o DBAQUI)

mongoexportcsv

OIFS=$IFS;
IFS=",";

dbname=DBAQUI
host=127.0.0.1:27017

collections=`mongo "$host/$dbname" --eval "rs.slaveOk();db.getCollectionNames();"`;
collections=`mongo $dbname --eval "rs.slaveOk();db.getCollectionNames();"`;
collectionArray=($collections);

for ((i=0; i<${#collectionArray[@]}; ++i));
do
    echo 'exporting collection' ${collectionArray[$i]}
    keys=`mongo "$host/$dbname" --eval "rs.slaveOk();var keys = []; for(var key in db.${collectionArray[$i]}.find().sort({_id: -1}).limit(1)[0]) { keys.push(key); }; keys;" --quiet`;
    mongoexport --host $host -d $dbname -c ${collectionArray[$i]} --fields "$keys" --csv --out $dbname.${collectionArray[$i]}.csv;
done

IFS=$OIFS;