How to get all documents from a data bucket using C #?

Question

How can I get all documents from a data bucket?

I tried a sample, but I can only get a specific document. Here is my code:

CouchbaseClient oclient; oclient= new CouchbaseClient("vwspace", "");// data bucket name var results = oclient.Get("205");// document id 

How to get all the documents?

 var results = oclient.? //what should i use here to get all documents 

Answer 1

Using Couchbase Server 2.0, you must use the view to retrieve all documents. Your opinion will look like this:

 function (doc, meta) { emit(null, null); } 

This view will give you access to all identifiers (the identifier is always included in the results without decreasing the query results).

For more information on views and view requests in .NET, see http://blog.couchbase.com/strongly-typed-views-net-client-library .

Answer 2

You cannot receive all documents. Create one “constant” atomic integer value that will be counter as follows:

 CouchbaseClient oclient; oclient= new CouchbaseClient("vwspace", "");// data bucket name ulong results = (ulong)oSourceBucket.Get("MYCOUNTER");// counter (integer incremental value) 

When you add documents to the bucket, do not add them with some documentId (I suppose you get this SQL database or something similar), but create them using counter as follows:

 results = oSourceBucket.Increment("MYCOUNTER", results, 1);// counter (integer incremental value) oSourceBucket.Store(StoreMode.Add, "MYITEM." + results.toString(), myNewObjectToStore); 

Now you can simply use the for loop for oSourceBucket.Get(...) all elements up to the MYCOUNTER value. I'm not sure that the new version of Couchbase 2.0 will have a template, but the current stable version (1.8.1, I think) allows you to get only the exact key.

Remember this storage is KEY-VALUE, not SQL :)

There is also MultiGet in Couchbase, but it does not exist in the latest stable version of the .NET client, but it is used under the hood just like a for... loop with several Get -s.

Answer 3

You need to create a couchbase view that emits a document identifier (meta.id).

Or use an existing view that emits every record.

Then

 http://HOST:8092/YOURBUCKETNAME/_design/YOURDESIGNDOCNAME/_view/YOURVIEWNAME?reduce=false&limit=10 

You will get the result as shown below.

 {"total_rows":1321085,"rows":[ {"id":"key1","key": ... ,"value": ... }, {"id":"key2","key": ... ,"value": ... }, {"id":"key3","key": ... ,"value": ... }, ... ] } 

The id field contains the document key.

You will need to break the pages into results. http://www.couchbase.com/docs/couchbase-manual-2.0/couchbase-views-writing-querying-pagination.html