![]() ![]() This tutorial was validated using a server running Ubuntu 20.04, and you can prepare your server by following this initial server setup tutorial for Ubuntu 20.04 MongoDB installed on your server. ![]() ![]() WebMongoDB How to make nested queries in MongoDb that works like nested Sql select queries. It’s open source and the code is available in Github. To follow this tutorial, you will need: A server with a regular, non-root user with privileges and a firewall configured with UFW. 2 billion jet duterte ike query mongodb compass questions. I need to build a query using MongoDB Compass tool to select distinct values of the genre field. Var guidDecoded = new Guid(bytes.Slice(0, bytesWritten).ToArray()).ToString() įinally, if you just need it now without writing code use a Blazor WebAssembly app I made just for this. I am using MongoDB Compass and dont have Mongo Shell. If (Convert.TryFromBase64String("YOUR_BASE64_STRING_HERE", bytes, out int bytesWritten)) Var bytes = new Span(new byte) //arbitrary number Var base64Encoded = Convert.ToBase64String("YOUR_GUID_HERE") Īnd here is a way to decode a base64 string that contains GUID bytes: Solutionįollows a C# solution which is simple enough, but of course requires to at least copy-paste the code to a project and run it: Worth mentioning here that we were working on this problem with Dean Herringer and he was the first to notice the problem. No matter how many times I attempted to convert the GUID using various online services to its base64 equivalent, I always failed because these services were converting the GUID to base64 as string!Īnd there’s your problem! Encoding a GUID’s bytes is different than encoding GUID’s representative string value. The value you see is actually a base64 encoded string of the GUID value.Īnd everything was cool for years, up until I had to manually debug a situation where I had to connect directly to MongoDB to search for a document based on a GUID I knew. Included Backup Replica nodes Enterprise-grade. Far from the previous useless sentence though, mind the blue square because this is how MongoDB stores a GUID. Flexible schema Rich Query Language Security and High Availability. The capture above is showing a part of MongoDB compass connected to a beta database with partially real but old data, located locally. Nevertheless, the schema above gave room for some beautiful data like the following image, with some databases and collections ending up having millions of data located in an availability zone probably near you! Im leaving a related topic for generating the ObjectIds by date as an edit to my answer. And Compass should actually use an embedded MongoDB Shell but the request neither fails, nor works. The request works fine in Robo 3T, an alternative of Mongo Compass. The schema of the document is not very important other than the fact that the ID should be of type GUID: Its actually a peculiar case with Compass.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |