Is it necessary to load a couchDB JSON document to the client first and then post it to another couchdb database in order to copy it from one db to another? Or is there a server-side method that can achieve this?
Reference The copy command is non-standard HTTP and only works within one database.
Affirmative, transferring data is restricted to within a single database; however, you have the option to duplicate individual or multiple documents:
curl -X POST http://localhost:5984/_replicate -H "Content-Type: application/json" -d '{"source": "db_a", "target":"db_b", "doc_ids": ["foo"]}'
Nevertheless, modifying the document ID is not possible in this scenario as it is with COPY. To achieve this, first make a copy of the document using COPY, replicate it, and then delete it from the source if necessary. By making three HTTP API calls and utilizing server-side methods, you can avoid loading document content onto the client side. The decision to opt for this approach, instead of implementing copy-logic on the client side, rests with you.
Utilizing node.js along with the request module.
Prior to running this code, ensure that the target document is present in the database and that the source attachment exists as well.
var originAttachment = 'somefile.txt'
var originDocId = '1somecouchdbid';
var origindb = 'http://localhost:5984/db1';
var destinationAttachment = 'somefile.txt'
var destinationDocId = '2somecouchdbid';
var desinationdb = 'http://localhost:5984/db2';
var uridestination = desinationdb + "/" + destinationDocId;
request(uridestination, function(err, res, body){
if(err){
throw err;
}
var doc = JSON.parse(body);
var origin = origindb + '/' + originDocId + '/' + encodeURIComponent(originAttachment);
var optionsOrigin = {
url: origin
};
var uridestination = desinationdb + '/' + destinationDocId + '/' + encodeURIComponent(destinationAttachment) + '?rev=' + doc._rev;
var optionDestination = {
url: uridestination,
method: 'PUT',
headers: {
'Content-Type': false
}
};
request(optionsOrigin)
.pipe(request(optionsDestination, function(err, res, body){
if(err){
throw err;
}
console.log(body);
}));
});
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