changed return type of IMongoIndexManager.CreateOneAsync per the index management specification.

Author: craiggwilson

src/MongoDB.Driver.Core/Core/Operations/CreateIndexRequest.cs

@@ -272,15 +272,24 @@ public BsonDocument Weights
             set { _weights = value; }
         }
 
+        // publuc methods
+        /// <summary>
+        /// Gets the name of the index.
+        /// </summary>
+        /// <returns>The name of the index.</returns>
+        public string GetIndexName()
+        {
+            var additionalOptionsName = _additionalOptions == null ? null : (string)_additionalOptions.GetValue("name", null);
+            return _name ?? additionalOptionsName ?? IndexNameHelper.GetIndexName(_keys);
+        }
+
         // methods
         internal BsonDocument CreateIndexDocument()
         {
-            var additionalOptionsName = _additionalOptions == null ? null : _additionalOptions.GetValue("name", null);
-            var name = _name ?? additionalOptionsName ?? IndexNameHelper.GetIndexName(_keys);
             var document = new BsonDocument
             {
                 { "key", _keys },
-                { "name", name },
+                { "name", GetIndexName() },
                 { "background", () => _background.Value, _background.HasValue },
                 { "bits", () => _bits.Value, _bits.HasValue },
                 { "bucketSize", () => _bucketSize.Value, _bucketSize.HasValue },

src/MongoDB.Driver.Tests/MongoCollectionImplTests.cs

@@ -320,7 +320,7 @@ public async Task CountAsync_should_execute_the_CountOperation()
             operation.MaxTime.Should().Be(options.MaxTime);
             operation.Skip.Should().Be(options.Skip);
         }
-        
+
         [Test]
         public async Task DeleteManyAsync_should_execute_the_BulkMixedOperation()
         {
@@ -686,6 +686,7 @@ public async Task Indexes_CreateAsync_should_execute_the_CreateIndexesOperation(
             request.Unique.Should().Be(options.Unique);
             request.Version.Should().Be(options.Version);
             request.Weights.Should().Be(weights);
+            request.GetIndexName().Should().Be(options.Name);
         }
 
         [Test]

src/MongoDB.Driver/IMongoIndexManager.cs

@@ -51,8 +51,10 @@ public interface IMongoIndexManager<TDocument>
         /// <param name="keys">The keys.</param>
         /// <param name="options">The options.</param>
         /// <param name="cancellationToken">The cancellation token.</param>
-        /// <returns>A task.</returns>
-        Task CreateOneAsync(IndexKeysDefinition<TDocument> keys, CreateIndexOptions options = null, CancellationToken cancellationToken = default(CancellationToken));
+        /// <returns>
+        /// A task whos result is the name of the index that was created.
+        /// </returns>
+        Task<string> CreateOneAsync(IndexKeysDefinition<TDocument> keys, CreateIndexOptions options = null, CancellationToken cancellationToken = default(CancellationToken));
 
         /// <summary>
         /// Drops all the indexes.

src/MongoDB.Driver/MongoCollectionImpl.cs

@@ -541,7 +541,7 @@ public override MongoCollectionSettings Settings
                 get { return _collection._settings; }
             }
 
-            public override Task CreateOneAsync(IndexKeysDefinition<TDocument> keys, CreateIndexOptions options, CancellationToken cancellationToken)
+            public override async Task<string> CreateOneAsync(IndexKeysDefinition<TDocument> keys, CreateIndexOptions options, CancellationToken cancellationToken)
             {
                 Ensure.IsNotNull(keys, "keys");
 
@@ -569,7 +569,8 @@ public override Task CreateOneAsync(IndexKeysDefinition<TDocument> keys, CreateI
                 };
 
                 var operation = new CreateIndexesOperation(_collection._collectionNamespace, new[] { request }, _collection._messageEncoderSettings);
-                return _collection.ExecuteWriteOperation(operation, cancellationToken);
+                await _collection.ExecuteWriteOperation(operation, cancellationToken);
+                return request.GetIndexName();
             }
 
             public override Task DropAllAsync(CancellationToken cancellationToken)

src/MongoDB.Driver/MongoIndexManagerBase.cs

@@ -35,7 +35,7 @@ public abstract class MongoIndexManagerBase<TDocument> : IMongoIndexManager<TDoc
         public abstract MongoCollectionSettings Settings { get; }
 
         /// <inheritdoc />
-        public abstract Task CreateOneAsync(IndexKeysDefinition<TDocument> keys, CreateIndexOptions options = null, CancellationToken cancellationToken = default(CancellationToken));
+        public abstract Task<string> CreateOneAsync(IndexKeysDefinition<TDocument> keys, CreateIndexOptions options = null, CancellationToken cancellationToken = default(CancellationToken));
 
         /// <inheritdoc />
         public abstract Task DropAllAsync(CancellationToken cancellationToken = default(CancellationToken));