mongodb-.net-driver

say i have this model { _id : 1, ref: '1', children: [ { ref:'1.1', grandchildren: [ { ref:'1.1.1', visible: true; } ] } ] } I'm aware that positional operator for nested arrays isn't available yet. https://jira.mongodb.org/browse/SERVER-831 but wondered whether its possible to atomically update the document in the nested array? In my example, i'd like to update the visible flag to false for the document for ref 1.1.1. I have the children record ref == '1.1' and the grandchildrenref == '1.1.1' thanks Yes, this is possible only if you knew the index of the children array that has the

I am testing a number of scenarios with MongoDb to see how to recover from possible data issues. I have classes (Addresses with collection of Address) with a zipcode property in Address which was originally cast as string. I saved out multiple records of Addresses and could retrieve them all fine. like this, var allAddresses = addresses.FindAllAs(); I changed the zip code property to int and saved some records. I then changed the zip code property back to string. When I attempt to read the collection back I get an error deserializing, as expected. var allAddresses = addresses.FindAllAs(); My

What's the new way to build indexes with the new driver 2.0? There's no documentation whatsoever about this. Apparently this now works with the new IndexKeysDefinitionBuilder<> interface but that's all I got so far. You need to call and await CreateOneAsync with an IndexKeysDefinition you get by using Builders.IndexKeys : static async Task CreateIndex() { var client = new MongoClient(); var database = client.GetDatabase("db"); var collection = database.GetCollection<Hamster>("collection"); await collection.Indexes.CreateOneAsync(Builders<Hamster>.IndexKeys.Ascending(_ => _.Name)); } If you don

i am new to mongodb and stack overflow. I want to know why on mongodb collection ID is of 24 hex characters? what is importance of that? Why is the default _id a 24 character hex string? The default unique identifier generated as the primary key ( _id ) for a MongoDB document is an ObjectId . This is a 12 byte binary value which is often represented as a 24 character hex string, and one of the standard field types supported by the MongoDB BSON specification . The 12 bytes of an ObjectId are constructed using: a 4 byte value representing the seconds since the Unix epoch a 3 byte machine

I know that I can atomically update an existing Mongo document by setting specific fields. The following code will do it: var update = MongoDB.Driver.Builders.Update.Set("InsideLegMeasurement", 32.4); SafeModeResult result = personCollection.Update(query, update, UpdateFlags.Multi,SafeMode.True); However, can I atomically update several fields by passing in a document that I want to 'merge' with the existing doc? Imagine I have a document as follows: {"favcolor":"red","favfood":"pasta"} and I want to update an existing doc with these values. I want to do this: var update = MongoDB.Driver

How can I add BsonArray to BsonDocument in MongoDB using a C# driver? I want a result something like this { author: 'joe', title : 'Yet another blog post', text : 'Here is the text...', tags : [ 'example', 'joe' ], comments : [ { author: 'jim', comment: 'I disagree' }, { author: 'nancy', comment: 'Good post' } ] } You can create the above document in C# with the following statement: var document = new BsonDocument { { "author", "joe" }, { "title", "yet another blog post" }, { "text", "here is the text..." }, { "tags", new BsonArray { "example", "joe" } }, { "comments", new BsonArray { new