When using a FindOne() using MongoDB and C#, is there a way to ignore fields not found in the object?
EG, example model.
public class UserModel { public ObjectId id { get; set; } public string Email { get; set; } }
Now we also store a password in the MongoDB collection, but do not want to bind it to out object above. When we do a Get like so,
var query = Query<UserModel>.EQ(e => e.Email, model.Email); var entity = usersCollection.FindOne(query);
We get the following error
Element 'Password' does not match any field or property of class
Is there anyway to tell Mongo to ignore fields it cant match with the models?
The MongoDB C Driver, also known as “libmongoc”, is a library for using MongoDB from C applications, and for writing MongoDB drivers in higher-level languages. It depends on libbson to generate and parse BSON documents, the native data format of MongoDB.
Welcome to the documentation site for the official MongoDB C++ driver. You can add the driver to your application to work with MongoDB using the C++11 or later standard.
MongoDB Community is the source available and free to use edition of MongoDB. MongoDB Enterprise is available as part of the MongoDB Enterprise Advanced subscription and includes comprehensive support for your MongoDB deployment.
Yes. Just decorate your UserModel
class with the BsonIgnoreExtraElements
attribute:
[BsonIgnoreExtraElements] public class UserModel { public ObjectId id { get; set; } public string Email { get; set; } }
As the name suggests, the driver would ignore any extra fields instead of throwing an exception. More information here - Ignoring Extra Elements.
Yet Another possible solution, is to register a convention for this.
This way, we do not have to annotate all classes with [BsonIgnoreExtraElements].
Somewhere when creating the mongo client, setup the following:
var pack = new ConventionPack(); pack.Add(new IgnoreExtraElementsConvention(true)); ConventionRegistry.Register("My Solution Conventions", pack, t => true);
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