go-native | Javascript polyfills that let you use native javascript | Addon library

it's me from the slides!! :) I remember that session, it was fun.

Yeah that doesn't work any more, they killed this magnificent feature like 6 months after we implemented it and we were out with it in Beta at the time. We had to change the way we work..

It's a shame since till this day, in Mongo, "connection" (network stuff, SSL, cluster identification) and authentication are 2 separate actions. Think about when you run mongo shell, you provide the host, port, replica set if any, and your in, connected! But not authenticated. You can then authenticate to user1, do stuff, and then authenticate to user2 and do stuff only user2 can do. And this is done on the same connection! without going thru the overhead creating the channel again, SSL handshake and so on...

Back then, the driver let us have a connection pool of "blank" connections that we could authenticate at will to the current tenant in context of that current execution thread.

Then they deprecated this capability, I think it was with Mongo 2.4. Now they only supported connections that are authenticated at creation. We asked enterprise support, they didn't say why, but to me it looked like they found this way is not secured, "old" authentication may leak, linger on that "not so blank" reusable connection.

We made a change in our multi-tenancy infra implementation, from a large pool of blank connections to many (small) pools of authenticated connections, a pool per tenant. These pools per tenant can be extremely small, like 3 or 5 connections. This solution scaled nicely to several hundreds of tenants, but to meet thousands of tenants we had to make all kinds of optimizations to create pools as needed, close them after idle time, lazy creation for non-active or dormant tenants, etc. This allowed us to scale even more... We're still looking into solutions and optimizations.

You could always go back to a global pool of authenticated connections to a Mongo user that have access to multiple databases. Yes, you can switch database on that same authenticated connection. You just can't switch authentication.. This is an example of pure Mongo Java driver, we used Spring which provide similar functionality:

Well, after a big trial and error run with this matter, I have finally cracked the problem - the url argument had to be changed from "window.location.href" to "#", and all problems I have described above stopped immediately. After adding in views.py's page_query function a JSON response at the end of the POST method block, I ended up having a web site which does file transfer and updates the user about the status of the upload without a need to be re-rendered after each form submission.

Would love to learn from someone more knowledgeable than myself, what does this "#" sign in there really do in there, as it has been a game-changer for me.

So I was able to solve this using examples on the internet (shown above) along with going through the existing code for the Barcode Scan Service. The issue I was experiencing with the above code was that the present view controller could not be found. However, looking at the bit bucket source for Barcode Scan, I was able to get the root view with the following code:

In the underlying collection, updated field is stored as a string and in your application you are querying it as a date, which won't yield anything but when you query it in mongo shell using a string it correctly returns the document.

Seeing that updated field is a string, try querying it as one i.e. changing the query variable to