Menu
With the 1.10 version of the .NET driver I could do something like this to get the max timestamp in the oplog collection:
this.oplogCollection.AsQueryable<OplogEntry>().Max(o => o.ts);
How can I do that with the new driver 2.0? The documentation is basically non-existent or not helpful, so I am hoping some insiders can shed some light here.
629
If you need to return the size of a document in MongoDB, you can use the following: The $bsonSize aggregation pipeline operator. The Object. bsonSize() method.
To query data from MongoDB collection, you need to use MongoDB's find() method.
In MongoDB, find() method is used to select documents in a collection and return a cursor to the selected documents. Cursor means a pointer that points to a document, when we use find() method it returns a pointer on the selected documents and returns one by one.
You can try this:
var result = await collection.Find(x => true).SortByDescending(d => d.ts).Limit(1).FirstOrDefaultAsync();
BTW $max doesn't give you the biggest value as in Linq or SQL, it specifies the upper exclusive bound of a Find. Documentation here
178
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
