Meta rev and cas documentation?

Node.js SDK
1

Hi,

I am using latest sdk and I can’t find any documentation about document metadatas. Can you help ?

How to get cas ? What I get is CouchbaseCas<7062207165670359040> an opaque and obscure structure

Where is the meta.rev attribute ?

Thanks,

Cyril

2

Hey @clakech,

What version of Couchbase Server are you using?

Best,

3

Now we are using 3.x but we may switch to 4.x soon, so both :wink:

4

Hey @clakech,

With 4.x you can leverage the power of N1QL to get meta information about your documents. For example, you can run the following:

SELECT META(mybucket) FROM bucket-name-here mybucket;

That will return the following results:

 [
    {
        "$1": {
            "cas": 5.4445395017728e+13,
            "flags": 0,
            "id": "doc-id-1",
            "type": "json"
        }
    },
    {
        "$1": {
            "cas": 5.4445405765632e+13,
            "flags": 0,
            "id": "doc-id-2",
            "type": "json"
        }
    }
]

Based on that information you can narrow your query like so:

SELECT META(mybucket).cas FROM `bucket-name-here` mybucket;

That would return only the CAS information about a document.

Otherwise, when you get documents from a lookup or ViewQuery you should be able to do result.cas where result is the particular document returned.

Let me know if this helps.

Best,

1 Like
5

Thanks or your answer!