MongoDB C# Driver: Ignore Property on Insert

Question

I am using the Official MongoDB C# Drive v0.9.1.26831, but I was wondering given a POCO class, is there anyway to ignore certain properties from getting inserted.

For example, I have the following class:

public class GroceryList {     public string Name { get; set; }     public FacebookList Owner { get; set; }     public bool IsOwner { get; set; } } 

Is there a way, for the IsOwner to not get inserted when I insert a GroceryList object? Basically, I fetch the object from the database then set the IsOwner property in the app layer and then return it back to the controller, which than maps the object to a view model.

Hope my question makes sense. thanks!

Answer 1

It looks like the [BsonIgnore] attribute did the job.

public class GroceryList : MongoEntity<ObjectId> {     public FacebookList Owner { get; set; }     [BsonIgnore]     public bool IsOwner { get; set; } } 

Answer 2

Alternatively, if you don't want to use the attribute for some reason (e. g. in case you don't want to bring an extra dependency to MongoDB.Bson to your DTO), you can do the following:

BsonClassMap.RegisterClassMap<GroceryList>(cm => {   cm.AutoMap();   cm.UnmapMember(m => m.IsOwner); });