PouchDB detect documents that aren't synced

Question

I am trying to sync a local PouchDB instance to a remote CouchDB. Things work great, but I am not sure how to deal with the following situation:

I have added a validation rule in CouchDB to prevent updating (it will deny all updates). When I run the sync function on my local PouchDB instance after modifying a document, the "denied" event fires as I would expect. However, if I run sync a second time, the "denied" event doesn't fire again, even though the local document differs from the CouchDB version.

How can I check if the local database matches the remote database? If I miss the "denied" event the first time (lets say the user closes the browser), how can I detect on the next run that the databases are not in sync? How can I force PouchDB to try and sync the modified document again so that I can see the denied event?

Thanks!

syncPouch: function(){
  var opts = {};
  var sync = PouchDB.sync('orders', db.remoteDB, opts);
  sync.on('change', function (info) {});
  sync.on('paused', function(){
  });
  sync.on('active', function () {});
  sync.on('denied', function(err){
    //This only fire once no matter how many times I call syncPouch
    console.log("Denied!!!!!!!!!!!!");
    debugger;
  });
  sync.on('complete', function (info) {
    //This fires every time
    console.log("complete");console.log(info);
  });
  sync.on('error', function(err){
    debugger;
  });
  return sync;
},

IanC IanC · Accepted Answer · 2017-10-16T09:21:54

What I have noticed with validate_doc_update functions is that PouchDb appears to treat any "denied" document as sync-ed. So even if you then remove the validate_doc_update function, the document will not sync into the remote database on future attempts even though it is not the same.

So you can be left with an "out of sync" situation that can only be fixed by editing one of the documents again.

Perhaps you are seeing the same thing? Perhaps the "denied" event does not fire because there is no attempt by PouchDb to sync the document (as it has already attempted to sync it previously)?

PouchDB detect documents that aren't synced

1 Answers