C# mongodb driver 2.0 - How to upsert in a bulk operation?

问题

I migrated from 1.9 to 2.2 and reading the documentation I was surprised to discover that is not possible to upsert during a bulk operation anymore, since operations don't allow options.

bulkOps.Add(new UpdateOneModel<BsonDocument>(filter, update));
collection.BulkWrite(bulkOps);

Should be

options.isUpsert = true;
bulkOps.Add(new UpdateOneModel<BsonDocument>(filter, update, options));
collection.BulkWrite(bulkOps);

Is this work in progress, intended, or I'm missing something? Thank you.

回答1:

Set the IsUpsert property of the UpdateOneModel to true to turn the update into an upsert.

var upsertOne = new UpdateOneModel<BsonDocument>(filter, update) { IsUpsert = true };
bulkOps.Add(upsertOne);
collection.BulkWrite(bulkOps);

回答2:

given mongo collection

IMongoCollection<T> collection

and enumerable of records to insert where T has Id field.

IEnumerable<T> records 

this snippet will do a bulk upsert (the filter condition may be changed according to the situation):

var bulkOps = new List<WriteModel<T>>();
foreach (var record in records)
{
    var upsertOne = new ReplaceOneModel<T>(
        Builders<T>.Filter.Where(x => x.Id == record.Id),
        record)
    { IsUpsert = true };
    bulkOps.Add(upsertOne);
}
collection.BulkWrite(bulkOps);

来源：https://stackoverflow.com/questions/35687470/c-sharp-mongodb-driver-2-0-how-to-upsert-in-a-bulk-operation