The use of "\u0FFF" on line 210 of beer_app.js doesn't appear to be explained or documented anywhere in the API reference for Couchbase Node.js 2.0 SDK. (Located here: http://docs.couchbase.com/sdk-api/couchbase-node-client-2.0.0/)

It is mentioned in the documentation for beersample-node, like so:

The code passes the user's input for the startkey and for the endkey passes the user's input appended with a Unicode \u0FFF value, which for the view engine means “end here.” You need to get used to it a bit, but it’s actually very neat and efficient.

That's hardly an explanation. Where do I go for further documentation on the "view engine"? In the meantime, could someone offer a better explanation of what's going on here?

If you click on [Edit] for any beer, and edit any field and then press [Save Changes], the following error is printed to the browser:

ReferenceError: rc is not defined
    at done_edit_beer (c:\git\5\beersample-node\beer_app.js:163:13)
    at callbacks (c:\git\5\beersample-node\node_modules\express\lib\router\index.js:164:37)
    at param (c:\git\5\beersample-node\node_modules\express\lib\router\index.js:138:11)
    at param (c:\git\5\beersample-node\node_modules\express\lib\router\index.js:135:11)
    at pass (c:\git\5\beersample-node\node_modules\express\lib\router\index.js:145:5)
    at Router._dispatch (c:\git\5\beersample-node\node_modules\express\lib\router\index.js:173:5)
    at Object.router (c:\git\5\beersample-node\node_modules\express\lib\router\index.js:33:10)
    at next (c:\git\5\beersample-node\node_modules\express\node_modules\connect\lib\proto.js:190:15)
    at Object.staticMiddleware [as handle] (c:\git\5\beersample-node\node_modules\express\node_modules\connect\lib\middleware\static.js:55:61)
    at next (c:\git\5\beersample-node\node_modules\express\node_modules\connect\lib\proto.js:190:15)

Solution

It seems that rc. was erroneously added to the front of rc.doc.brewery_id on line 163 of beer_app.js. Remove the text rc., save the file, and restart the server and the edit feature now works.

  db.get( rc.doc.brewery_id, function(err, result) {

becomes

  db.get( doc.brewery_id, function(err, result) {

Editing should now work.

Note: I'm really surprised this hasn't been noticed for nearly a year now. Is nobody learning to use Couchbase on Node.js?

Note #2: I really wish there were more sample applications for Node.js, more full-fledged examples that show best practices of using Node.js and of using Couchbase. Samples with production-ready error handling, and samples that are perhaps designed to demonstrate the scalability of couchbase as part of the application (like perhaps some data-processing on statistics or something involving alot of data crunching, maybe GeoSpatial). Perhaps someone could suggest some solid open source projects which do this, for me to look over?

it happens when you try to edit a beer

fix this function

db.get( doc.brewery_id, function(err, result)

at

  function done_edit_beer(req, res) {
    var doc = normalize_beer_fields(req.body);
    //console.log(req.body);

    db.get( rc.doc.brewery_id, function(err, result) {
      if (result.value === undefined) { // Trying to edit non-existing doc ?
        res.send(404);
      } else {    // Set and redirect.
        db.set( req.params.beer_id, doc, function(err, doc, meta) {
          res.redirect('/beers/show/'+req.params.beer_id);
        })
      }
    });
  }

ReferenceError: rc is not defined
at done_edit_beer (/var/node/beersample-node/beer_app.js:157:13)
at callbacks (/var/node/beersample-node/node_modules/express/lib/router/index.js:164:37)
at param (/var/node/beersample-node/node_modules/express/lib/router/index.js:138:11)
at param (/var/node/beersample-node/node_modules/express/lib/router/index.js:135:11)
at pass (/var/node/beersample-node/node_modules/express/lib/router/index.js:145:5)
at Router._dispatch (/var/node/beersample-node/node_modules/express/lib/router/index.js:173:5)
at Object.router (/var/node/beersample-node/node_modules/express/lib/router/index.js:33:10)
at next (/var/node/beersample-node/node_modules/express/node_modules/connect/lib/proto.js:190:15)
at Object.staticMiddleware as handle
at next (/var/node/beersample-node/node_modules/express/node_modules/connect/lib/proto.js:190:15)

If there is no "design" in the "beer-samples" bucket called "beer", running node beer.js --setup fails with the following error:

$ node beer.js --setup

c:\git\5\beersample-node\beer_designs.js:37
            if(! ('by_name' in ddoc['views']) ) {
                                   ^
TypeError: Cannot read property 'views' of null
    at c:\git\5\beersample-node\beer_designs.js:37:36
    at c:\git\5\beersample-node\node_modules\couchbase\lib\bucketmgr.js:131:14
    at IncomingMessage.<anonymous> (c:\git\5\beersample-node\node_modules\couchb
ase\lib\bucketmgr.js:11:7)
    at IncomingMessage.emit (events.js:117:20)
    at _stream_readable.js:943:16
    at process._tickCallback (node.js:419:13)

What's funny is that this condition (having no document found) appears to be handled when the code that follows creates the "brewery" view -- it checks for err and creates a breweries design object. But this check isn't done when creating the "beers" view.

The code should be fixed. However, my workaround was to go to the database administration console, and add a fake view called fake under a design named specifically beer. This results in
node beer.js --setup successfully running, and the application working when started.