Introduce a new OpenIddictMongoDbOptions.DisableInitialization option

src/OpenIddict.MongoDb/OpenIddictMongoDbBuilder.cs

@@ -57,6 +57,14 @@ namespace Microsoft.Extensions.DependencyInjection
             return this;
         }
 
+        /// <summary>
+        /// Disables initialization so that the MongoDB indexes used by OpenIddict
+        /// are not automatically created the first time the stores are invoked.
+        /// </summary>
+        /// <returns>The <see cref="OpenIddictMongoDbBuilder"/>.</returns>
+        public OpenIddictMongoDbBuilder DisableInitialization()
+            => Configure(options => options.DisableInitialization = true);
+
         /// <summary>
         /// Configures OpenIddict to use the specified entity as the default application entity.
         /// </summary>

src/OpenIddict.MongoDb/OpenIddictMongoDbContext.cs

@@ -84,38 +84,41 @@ namespace OpenIddict.MongoDb
                             .ToString());
                     }
 
-                    // Note: the cancellation token passed as a parameter is deliberately not used here to ensure
-                    // the cancellation of a single store operation doesn't prevent the indexes from being created.
-                    var applications = database.GetCollection<OpenIddictApplication>(options.ApplicationsCollectionName);
-                    await applications.Indexes.CreateOneAsync(new CreateIndexModel<OpenIddictApplication>(
-                        Builders<OpenIddictApplication>.IndexKeys.Ascending(application => application.ClientId),
-                        new CreateIndexOptions
-                        {
-                            Unique = true
-                        }));
-
-                    await applications.Indexes.CreateOneAsync(new CreateIndexModel<OpenIddictApplication>(
-                        Builders<OpenIddictApplication>.IndexKeys.Ascending(application => application.PostLogoutRedirectUris)));
-
-                    await applications.Indexes.CreateOneAsync(new CreateIndexModel<OpenIddictApplication>(
-                        Builders<OpenIddictApplication>.IndexKeys.Ascending(application => application.RedirectUris)));
-
-                    var scopes = database.GetCollection<OpenIddictScope>(options.ScopesCollectionName);
-                    await scopes.Indexes.CreateOneAsync(new CreateIndexModel<OpenIddictScope>(
-                        Builders<OpenIddictScope>.IndexKeys.Ascending(scope => scope.Name),
-                        new CreateIndexOptions
-                        {
-                            Unique = true
-                        }));
-
-                    var tokens = database.GetCollection<OpenIddictToken>(options.TokensCollectionName);
-                    await tokens.Indexes.CreateOneAsync(new CreateIndexModel<OpenIddictToken>(
-                        Builders<OpenIddictToken>.IndexKeys.Ascending(token => token.ReferenceId),
-                        new CreateIndexOptions<OpenIddictToken>
-                        {
-                            PartialFilterExpression = Builders<OpenIddictToken>.Filter.Exists(token => token.ReferenceId),
-                            Unique = true
-                        }));
+                    if (!options.DisableInitialization)
+                    {
+                        // Note: the cancellation token passed as a parameter is deliberately not used here to ensure
+                        // the cancellation of a single store operation doesn't prevent the indexes from being created.
+                        var applications = database.GetCollection<OpenIddictApplication>(options.ApplicationsCollectionName);
+                        await applications.Indexes.CreateOneAsync(new CreateIndexModel<OpenIddictApplication>(
+                            Builders<OpenIddictApplication>.IndexKeys.Ascending(application => application.ClientId),
+                            new CreateIndexOptions
+                            {
+                                Unique = true
+                            }));
+
+                        await applications.Indexes.CreateOneAsync(new CreateIndexModel<OpenIddictApplication>(
+                            Builders<OpenIddictApplication>.IndexKeys.Ascending(application => application.PostLogoutRedirectUris)));
+
+                        await applications.Indexes.CreateOneAsync(new CreateIndexModel<OpenIddictApplication>(
+                            Builders<OpenIddictApplication>.IndexKeys.Ascending(application => application.RedirectUris)));
+
+                        var scopes = database.GetCollection<OpenIddictScope>(options.ScopesCollectionName);
+                        await scopes.Indexes.CreateOneAsync(new CreateIndexModel<OpenIddictScope>(
+                            Builders<OpenIddictScope>.IndexKeys.Ascending(scope => scope.Name),
+                            new CreateIndexOptions
+                            {
+                                Unique = true
+                            }));
+
+                        var tokens = database.GetCollection<OpenIddictToken>(options.TokensCollectionName);
+                        await tokens.Indexes.CreateOneAsync(new CreateIndexModel<OpenIddictToken>(
+                            Builders<OpenIddictToken>.IndexKeys.Ascending(token => token.ReferenceId),
+                            new CreateIndexOptions<OpenIddictToken>
+                            {
+                                PartialFilterExpression = Builders<OpenIddictToken>.Filter.Exists(token => token.ReferenceId),
+                                Unique = true
+                            }));
+                    }
 
                     return _database = database;
                 }

src/OpenIddict.MongoDb/OpenIddictMongoDbOptions.cs

@@ -30,6 +30,11 @@ namespace OpenIddict.MongoDb
         /// </summary>
         public IMongoDatabase Database { get; set; }
 
+        /// <summary>
+        /// Gets or sets a boolean indicating whether automatic initialization should be disabled.
+        /// </summary>
+        public bool DisableInitialization { get; set; }
+
         /// <summary>
         /// Gets or sets the maximal duration given to the MongoDB client to initialize
         /// the database and register the indexes used by the OpenIddict entities.

test/OpenIddict.MongoDb.Tests/OpenIddictMongoDbBuilderTests.cs

@@ -29,6 +29,23 @@ namespace OpenIddict.MongoDb.Tests
             Assert.Equal("services", exception.ParamName);
         }
 
+        [Fact]
+        public void DisableInitialization_InitializationIsCorrectlyDisabled()
+        {
+            // Arrange
+            var services = CreateServices();
+            var builder = CreateBuilder(services);
+
+            // Act
+            builder.DisableInitialization();
+
+            // Assert
+            var provider = services.BuildServiceProvider();
+            var options = provider.GetRequiredService<IOptionsMonitor<OpenIddictMongoDbOptions>>().CurrentValue;
+
+            Assert.True(options.DisableInitialization);
+        }
+
         [Fact]
         public void ReplaceDefaultApplicationEntity_EntityIsCorrectlySet()
         {

test/OpenIddict.MongoDb.Tests/OpenIddictMongoDbContextTests.cs

@@ -165,6 +165,32 @@ namespace OpenIddict.MongoDb.Tests
             Assert.Same(database.Object, await context.GetDatabaseAsync(CancellationToken.None));
         }
 
+        [Fact]
+        public async Task GetDatabaseAsync_SkipsInitializationWhenDisabled()
+        {
+            // Arrange
+            var services = new ServiceCollection();
+            var provider = services.BuildServiceProvider();
+
+            var database = GetDatabase();
+            var options = Mock.Of<IOptionsMonitor<OpenIddictMongoDbOptions>>(
+                mock => mock.CurrentValue == new OpenIddictMongoDbOptions
+                {
+                    Database = database.Object,
+                    DisableInitialization = true
+                });
+
+            var context = new OpenIddictMongoDbContext(options, provider);
+
+            // Act
+            await context.GetDatabaseAsync(CancellationToken.None);
+
+            // Assert
+            database.Verify(mock => mock.GetCollection<OpenIddictApplication>(It.IsAny<string>(), It.IsAny<MongoCollectionSettings>()), Times.Never());
+            database.Verify(mock => mock.GetCollection<OpenIddictScope>(It.IsAny<string>(), It.IsAny<MongoCollectionSettings>()), Times.Never());
+            database.Verify(mock => mock.GetCollection<OpenIddictToken>(It.IsAny<string>(), It.IsAny<MongoCollectionSettings>()), Times.Never());
+        }
+
         [Fact]
         public async Task GetDatabaseAsync_ReturnsCachedDatabase()
         {