Exemple d'importation et d'exportation de MongoDB
Dans ce tutoriel, nous vous montrons comment sauvegarder et restaurer MongoDB avec les commandes:mongoexport etmongoimport.
1. Sauvegarder la base de données avec mongoexport
Quelques exemples pour vous montrer comment utiliser lesmongoexport pour sauvegarder la base de données.
Passez en revue certaines des options d'utilisation courantes.
$ mongoexport Export MongoDB data to CSV, TSV or JSON files. options: -h [ --host ] arg mongo host to connect to (/s1,s2 for -u [ --username ] arg username -p [ --password ] arg password -d [ --db ] arg database to use -c [ --collection ] arg collection to use (some commands) -q [ --query ] arg query filter, as a JSON string -o [ --out ] arg output file; if not specified, stdout is used
1.1 Export all documents (all fields) into the file “domain-bk.json“.
$ mongoexport -d webmitta -c domain -o domain-bk.json connected to: 127.0.0.1 exported 10951 records
1.2 Export all documents with fields “domain” and “worth” only.
$ mongoexport -d webmitta -c domain -f "domain,worth" -o domain-bk.json connected to: 127.0.0.1 exported 10951 records
1.3 Export all documents with a search query, in this case, only document with “worth > 100000” will be exported.
$mongoexport -d webmitta -c domain -f "domain,worth" -q '{worth:{$gt:100000}}' -o domain-bk.json
connected to: 127.0.0.1
exported 10903 records
1.4 Connect to remote server like mongolab.com, using username and password.
$ mongoexport -h id.mongolab.com:47307 -d heroku_app -c domain -u username123 -p password123 -o domain-bk.json connected to: id.mongolab.com:47307 exported 10951 records
Vérifiez le fichier exporté.
$ ls -lsa total 2144 0 drwxr-xr-x 5 example staff 170 Apr 10 12:00 . 0 drwxr-xr-x+ 50 example staff 1700 Apr 5 10:55 .. 2128 -rw-r--r-- 1 example staff 1089198 Apr 10 12:15 domain-bk.json
Note
Avecmongoexport, tous les documents exportés seront au format json.
2. Restaurer la base de données avec mongoimport
Quelques exemples pour vous montrer comment utiliser lesmongoimport pour restaurer la base de données.
Passez en revue certaines des options d'utilisation courantes.
$ mongoimport connected to: 127.0.0.1 no collection specified! Import CSV, TSV or JSON data into MongoDB. options: -h [ --host ] arg mongo host to connect to (/s1,s2 for sets) -u [ --username ] arg username -p [ --password ] arg password -d [ --db ] arg database to use -c [ --collection ] arg collection to use (some commands) -f [ --fields ] arg comma separated list of field names e.g. -f name,age --file arg file to import from; if not specified stdin is used --drop drop collection first --upsert insert or update objects that already exist
2.1 Imports all documents from file “domain-bk.json” into database.collection named “webmitta2.domain2”. Toutes les bases de données ou collections inexistantes seront créées automatiquement.
$ mongoimport -d webmitta2 -c domain2 --file domain-bk.json connected to: 127.0.0.1 Wed Apr 10 13:26:12 imported 10903 objects
2.2 Imports all documents, insert or update objects that already exist (based on the _id).
$ mongoimport -d webmitta2 -c domain2 --file domain-bk.json --upsert connected to: 127.0.0.1 Wed Apr 10 13:26:12 imported 10903 objects
2.3 Connect to remote server – mongolab.com, using username and password, and import the documents from the local file domain-bk.json into remote MongoDB server.
$ mongoimport -h id.mongolab.com:47307 -d heroku_app -c domain -u username123 -p password123 --file domain-bk.json connected to: id.mongolab.com:47307 Wed Apr 10 13:26:12 imported 10903 objects