Original data

[indexzero]

When querying a view for changes it is often useful to get the full original set of view data before handling changes.

Would be nice if follow could handle this.

[jhs]

Sorry, I'm not clear. Can you give some URL or http examples of what you mean? Thanks.

[indexzero]

Sure thing. Say that you want to watch for changes on app/location:

follow({
    db: "https://example.iriscouch.com/boogie",
    filter: "app/location", 
    include_docs:true
  }, function (error, change) {
  if (!error) {
    console.log("Change " + change.seq + " has " + Object.keys(change.doc).length + " fields");
  }
})

Now iirc the callback function (error, change) will only get called when an update is made to app/location, but when you make the follow request there are existing documents in the view which you want to know about. With this implementation you would need to do something like:

//
// Get all documents in the view now
//
request("https://example.iriscouch.com/boogie/_design/app/_view/location", function (err, res, body) {
  //
  // Build list of existing documents in the view
  //
});

//
// Listen for changes
//
follow({
    db: "https://example.iriscouch.com/boogie",
    filter: "app/location", 
    include_docs:true
  }, function (error, change) {
  if (!error) {
    console.log("Change " + change.seq + " has " + Object.keys(change.doc).length + " fields");
  }

  //
  // Continuously update list with changes from the view.
  //
})