MongoDB C# Driver 2.0 - Update document

问题:

I'm currently upgrading my code to MongoDB C# driver 2.0 and I'm having issues upgrading the code to update documents.

using the old version I was able to do something like this:

MyType myObject; // passed in 
var collection = _database.GetCollection<MyType>("myTypes");
var result = collection.Save(myObject);

I'm struggling to find a way to do this in the new version. I have found a few examples of updating single fields like

var filter = Builders<MyType>.Filter.Eq(s => s.Id, id);
var update = Builders<MyType>.Update.Set(s => s.Description, description);
var result = await collection.UpdateOneAsync(filter, update);

I'd like to update all the fields as I was doing in the old version with the method Save.

Any ideas ?

Thanks a lot

回答1:

I think you're looking for ReplaceOneAsync():

MyType myObject; // passed in 
var filter = Builders<MyType>.Filter.Eq(s => s.Id, id);
var result = await collection.ReplaceOneAsync(filter, myObject)

回答2:

To add to mnemosyn's answer, while a simple ReplaceOneAsync does update a document it isn't equivalent to Save as Save would also insert the document if it didn't found one to update.

To achieve the same behavior with ReplaceOneAsync you need to use the options parameter:

MyType myObject; 
var result = await collection.ReplaceOneAsync(
    item => item.Id == id, 
    myObject, 
    new UpdateOptions {IsUpsert = true});

回答3:

you can use LINQ as following: await context.collection.ReplaceOneAsync(b=> b.Id == item.Id,item);