Remove DbConfig and new constructors on DbContextBase and refactor Migrations to use explcit generation of IOqtaneDatabase instance

Oqtane.Client/Modules/Admin/Sites/Add.razor

@@ -11,7 +11,6 @@
 @inject IInstallationService InstallationService
 @inject IDatabaseService DatabaseService
 @inject IStringLocalizer<Add> Localizer
-@inject IEnumerable<IOqtaneDatabase> Databases
 
 @if (_tenants == null)
 {

Oqtane.Server/Databases/Interfaces/IMultiDatabase.cs

@@ -5,6 +5,6 @@ namespace Oqtane.Repository.Databases.Interfaces
 {
     public interface IMultiDatabase
     {
-        public IEnumerable<IOqtaneDatabase> Databases { get; }
+        public IOqtaneDatabase ActiveDatabase { get; }
     }
 }

Oqtane.Server/Extensions/DbContextOptionsBuilderExtensions.cs

@@ -14,16 +14,5 @@ namespace Oqtane.Extensions
 
             return optionsBuilder;
         }
-
-        public static DbContextOptionsBuilder UseOqtaneDatabase([NotNull] this DbContextOptionsBuilder optionsBuilder, string databaseType, string connectionString)
-        {
-            var type = Type.GetType(databaseType);
-            var database = Activator.CreateInstance(type) as IOqtaneDatabase;
-
-            database.UseDatabase(optionsBuilder, connectionString);
-
-            return optionsBuilder;
-        }
-
     }
 }

Oqtane.Server/Extensions/OqtaneServiceCollectionExtensions.cs

@@ -47,17 +47,6 @@ namespace Microsoft.Extensions.DependencyInjection
                     }
                 }
 
-                // dynamically register database providers
-                var databaseTypes = assembly.GetInterfaces<IOqtaneDatabase>();
-                foreach (var databaseType in databaseTypes)
-                {
-                    if (databaseType.AssemblyQualifiedName != null)
-                    {
-                        var serviceType = Type.GetType("Oqtane.Interfaces.IOqtaneDatabase, Oqtane.Shared");
-                        services.AddScoped(serviceType ?? databaseType, databaseType);
-                    }
-                }
-
                 // dynamically register hosted services
                 var serviceTypes = assembly.GetTypes(hostedServiceType);
                 foreach (var serviceType in serviceTypes)

Oqtane.Server/Infrastructure/DatabaseManager.cs

@@ -30,6 +30,8 @@ namespace Oqtane.Infrastructure
         private readonly IServiceScopeFactory _serviceScopeFactory;
         private readonly IMemoryCache _cache;
 
+        private IOqtaneDatabase _database;
+
         public DatabaseManager(IConfigurationRoot config, IServiceScopeFactory serviceScopeFactory, IMemoryCache cache)
         {
             _config = config;
@@ -185,18 +187,12 @@ namespace Oqtane.Infrastructure
                     var dataDirectory = AppDomain.CurrentDomain.GetData("DataDirectory")?.ToString();
                     if (!Directory.Exists(dataDirectory)) Directory.CreateDirectory(dataDirectory ?? String.Empty);
 
-                    var connectionString = NormalizeConnectionString(install.ConnectionString);
+                    var dbOptions = new DbContextOptionsBuilder().UseOqtaneDatabase(install.Database, NormalizeConnectionString(install.ConnectionString)).Options;
-                    var databaseType = install.DatabaseType;
+                    using (var dbc = new DbContext(dbOptions))
-                    using (var scope = _serviceScopeFactory.CreateScope())
                     {
-                        var databases = scope.ServiceProvider.GetServices<IOqtaneDatabase>();
+                        // create empty database if it does not exist
-
+                        dbc.Database.EnsureCreated();
-                        using (var dbc = new DbContext(new DbContextOptionsBuilder().UseOqtaneDatabase(databases.Single(d => d.TypeName == databaseType), connectionString).Options))
+                        result.Success = true;
-                        {
-                            // create empty database if it does not exist
-                            dbc.Database.EnsureCreated();
-                            result.Success = true;
-                        }
                     }
                 }
                 catch (Exception ex)
@@ -220,16 +216,16 @@ namespace Oqtane.Infrastructure
             {
                 using (var scope = _serviceScopeFactory.CreateScope())
                 {
-                    var databases = scope.ServiceProvider.GetServices<IOqtaneDatabase>();
                     var sql = scope.ServiceProvider.GetRequiredService<ISqlRepository>();
 
+                    var installation = IsInstalled();
                     try
                     {
-                        var dbConfig = new DbConfig(null, null, databases) {ConnectionString = install.ConnectionString, DatabaseType = install.DatabaseType};
+                        UpdateConnectionString(install.ConnectionString);
+                        UpdateDatabaseType(install.DatabaseType);
 
-                        using (var masterDbContext = new MasterDBContext(new DbContextOptions<MasterDBContext>(), dbConfig))
+                        using (var masterDbContext = new MasterDBContext(new DbContextOptions<MasterDBContext>(), null, _config))
                         {
-                            var installation = IsInstalled();
                             if (installation.Success && (install.DatabaseType == "SqlServer" || install.DatabaseType == "LocalDB"))
                             {
                                 UpgradeSqlServer(sql, install.ConnectionString, install.DatabaseType, true);
@@ -244,10 +240,10 @@ namespace Oqtane.Infrastructure
                         result.Message = ex.Message;
                     }
 
-                    if (result.Success)
+                    if (!result.Success)
                     {
-                        UpdateConnectionString(install.ConnectionString);
+                        UpdateConnectionString(String.Empty);
-                        UpdateDatabaseType(install.DatabaseType);
+                        UpdateDatabaseType(String.Empty);
                     }
                 }
             }
@@ -265,11 +261,7 @@ namespace Oqtane.Infrastructure
 
             if (!string.IsNullOrEmpty(install.TenantName) && !string.IsNullOrEmpty(install.Aliases))
             {
-                using (var scope = _serviceScopeFactory.CreateScope())
+                    using (var db = GetInstallationContext())
-                {
-                    var databases = scope.ServiceProvider.GetServices<IOqtaneDatabase>();
-
-                    using (var db = GetInstallationContext(databases))
                     {
                         Tenant tenant;
                         if (install.IsNewTenant)
@@ -315,7 +307,6 @@ namespace Oqtane.Infrastructure
 
                         _cache.Remove("aliases");
                     }
-                }
             }
 
             result.Success = true;
@@ -332,19 +323,19 @@ namespace Oqtane.Infrastructure
             using (var scope = _serviceScopeFactory.CreateScope())
             {
                 var upgrades = scope.ServiceProvider.GetRequiredService<IUpgradeManager>();
-                var databases = scope.ServiceProvider.GetServices<IOqtaneDatabase>();
                 var sql = scope.ServiceProvider.GetRequiredService<ISqlRepository>();
+                var tenantManager = scope.ServiceProvider.GetRequiredService<ITenantManager>();
 
-                using (var db = GetInstallationContext(databases))
+                using (var db = GetInstallationContext())
                 {
                     foreach (var tenant in db.Tenant.ToList())
                     {
+                        tenantManager.SetTenant(tenant.TenantId);
                         try
                         {
-                            var dbConfig = new DbConfig(null, null, databases) {ConnectionString = tenant.DBConnectionString, DatabaseType = tenant.DBType};
+                            using (var tenantDbContext = new TenantDBContext(tenantManager, null))
-                            using (var tenantDbContext = new TenantDBContext(dbConfig, null))
                             {
-                                if (dbConfig.DatabaseType == "SqlServer" || dbConfig.DatabaseType == "LocalDB")
+                                if (install.DatabaseType == "SqlServer" || install.DatabaseType == "LocalDB")
                                 {
                                     UpgradeSqlServer(sql, tenant.DBConnectionString, tenant.DBType, false);
                                 }
@@ -393,7 +384,6 @@ namespace Oqtane.Infrastructure
             {
                 var moduleDefinitions = scope.ServiceProvider.GetRequiredService<IModuleDefinitionRepository>();
                 var sql = scope.ServiceProvider.GetRequiredService<ISqlRepository>();
-                var databases = scope.ServiceProvider.GetServices<IOqtaneDatabase>();
 
                 foreach (var moduleDefinition in moduleDefinitions.GetModuleDefinitions())
                 {
@@ -403,7 +393,7 @@ namespace Oqtane.Infrastructure
                         if (moduleType != null)
                         {
                             var versions = moduleDefinition.ReleaseVersions.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
-                            using (var db = GetInstallationContext(databases))
+                            using (var db = GetInstallationContext())
                             {
                                 foreach (var tenant in db.Tenant.ToList())
                                 {
@@ -591,12 +581,19 @@ namespace Oqtane.Infrastructure
             return connectionString;
         }
 
-        private InstallationContext GetInstallationContext(IEnumerable<IOqtaneDatabase> databases)
+        private InstallationContext GetInstallationContext()
         {
+            var connectionString = _config.GetConnectionString(SettingKeys.ConnectionStringKey);
             var databaseType = _config.GetSection(SettingKeys.DatabaseSection)[SettingKeys.DatabaseTypeKey];
-            var connectionString = NormalizeConnectionString(_config.GetConnectionString(SettingKeys.ConnectionStringKey));
+            IOqtaneDatabase database = null;
 
-            return new InstallationContext(databases.Single(d => d.TypeName == databaseType), connectionString);
+            if (!String.IsNullOrEmpty(databaseType))
+            {
+                var type = Type.GetType(databaseType);
+                database = Activator.CreateInstance(type) as IOqtaneDatabase;
+            }
+
+            return new InstallationContext(database, connectionString);
         }
 
         private string GetInstallationConfig(string key, string defaultValue)

Oqtane.Server/Migrations/01000000_InitializeMaster.cs

@@ -11,7 +11,7 @@ namespace Oqtane.Migrations
     [Migration("Master.01.00.00.00")]
     public class InitializeMaster : MultiDatabaseMigration
     {
-        public InitializeMaster(IEnumerable<IOqtaneDatabase> databases) : base(databases)
+        public InitializeMaster(IOqtaneDatabase database) : base(database)
         {
         }
 

Oqtane.Server/Migrations/01000000_InitializeTenant.cs

@@ -12,7 +12,7 @@ namespace Oqtane.Migrations
     [Migration("Tenant.01.00.00.00")]
     public class InitializeTenant : MultiDatabaseMigration
     {
-        public InitializeTenant(IEnumerable<IOqtaneDatabase> databases) : base(databases)
+        public InitializeTenant(IOqtaneDatabase database) : base(database)
         {
         }
 

Oqtane.Server/Migrations/01000100_AddAdditionalIndexesInMaster.cs

@@ -11,7 +11,7 @@ namespace Oqtane.Migrations
     [Migration("Master.01.00.01.00")]
     public class AddAdditionalIndexesInMaster : MultiDatabaseMigration
     {
-        public AddAdditionalIndexesInMaster(IEnumerable<IOqtaneDatabase> databases) : base(databases)
+        public AddAdditionalIndexesInMaster(IOqtaneDatabase database) : base(database)
         {
         }
 

Oqtane.Server/Migrations/01000100_AddAdditionalIndexesInTenant.cs

@@ -11,7 +11,7 @@ namespace Oqtane.Migrations
     [Migration("Tenant.01.00.01.00")]
     public class AddAdditionalIndexesInTenant : MultiDatabaseMigration
     {
-        public AddAdditionalIndexesInTenant(IEnumerable<IOqtaneDatabase> databases) : base(databases)
+        public AddAdditionalIndexesInTenant(IOqtaneDatabase database) : base(database)
         {
         }
 

Oqtane.Server/Migrations/01000101_AddAdditionColumnToNotifications.cs

@@ -11,7 +11,7 @@ namespace Oqtane.Migrations
     [Migration("Tenant.01.00.01.01")]
     public class AddAdditionColumnToNotifications : MultiDatabaseMigration
     {
-        public AddAdditionColumnToNotifications(IEnumerable<IOqtaneDatabase> databases) : base(databases)
+        public AddAdditionColumnToNotifications(IOqtaneDatabase database) : base(database)
         {
         }
 

Oqtane.Server/Migrations/01000201_DropColumnFromPage.cs

@@ -11,7 +11,7 @@ namespace Oqtane.Migrations
     [Migration("Tenant.01.00.02.01")]
     public class DropColumnFromPage : MultiDatabaseMigration
     {
-        public DropColumnFromPage(IEnumerable<IOqtaneDatabase> databases) : base(databases)
+        public DropColumnFromPage(IOqtaneDatabase database) : base(database)
         {
         }
 

Oqtane.Server/Migrations/02000001_AddColumnToProfileAndUpdatePage.cs

@@ -11,7 +11,7 @@ namespace Oqtane.Migrations
     [Migration("Tenant.02.00.00.01")]
     public class AddColumnToProfileAndUpdatePage : MultiDatabaseMigration
     {
-        public AddColumnToProfileAndUpdatePage(IEnumerable<IOqtaneDatabase> databases) : base(databases)
+        public AddColumnToProfileAndUpdatePage(IOqtaneDatabase database) : base(database)
         {
         }
 

Oqtane.Server/Migrations/02000101_UpdateIconColumnInPage.cs

@@ -11,7 +11,7 @@ namespace Oqtane.Migrations
     [Migration("Tenant.02.00.01.01")]
     public class UpdateIconColumnInPage : MultiDatabaseMigration
     {
-        public UpdateIconColumnInPage(IEnumerable<IOqtaneDatabase> databases) : base(databases)
+        public UpdateIconColumnInPage(IOqtaneDatabase database) : base(database)
         {
         }
 

Oqtane.Server/Migrations/02000102_AddLanguageTable.cs

@@ -11,7 +11,7 @@ namespace Oqtane.Migrations
     [Migration("Tenant.02.00.01.02")]
     public class AddLanguageTable : MultiDatabaseMigration
     {
-        public AddLanguageTable(IEnumerable<IOqtaneDatabase> databases) : base(databases)
+        public AddLanguageTable(IOqtaneDatabase database) : base(database)
         {
         }
 

Oqtane.Server/Migrations/02000103_UpdatePageAndAddColumnToSite.cs

@@ -11,7 +11,7 @@ namespace Oqtane.Migrations
     [Migration("Tenant.02.00.01.03")]
     public class UpdatePageAndAddColumnToSite : MultiDatabaseMigration
     {
-        public UpdatePageAndAddColumnToSite(IEnumerable<IOqtaneDatabase> databases) : base(databases)
+        public UpdatePageAndAddColumnToSite(IOqtaneDatabase database) : base(database)
         {
         }
 

Oqtane.Server/Migrations/02000201_AddSiteGuidToSite.cs

@@ -12,7 +12,7 @@ namespace Oqtane.Migrations
 
     public class AddSiteGuidToSite : MultiDatabaseMigration
     {
-        public AddSiteGuidToSite(IEnumerable<IOqtaneDatabase> databases) : base(databases)
+        public AddSiteGuidToSite(IOqtaneDatabase database) : base(database)
         {
         }
 

Oqtane.Server/Migrations/02000202_UpdateDefaultContainerTypeInSitePage.cs

@@ -11,7 +11,7 @@ namespace Oqtane.Migrations
     [Migration("Tenant.02.00.02.02")]
     public class UpdateDefaultContainerTypeInSitePage : MultiDatabaseMigration
     {
-        public UpdateDefaultContainerTypeInSitePage(IEnumerable<IOqtaneDatabase> databases) : base(databases)
+        public UpdateDefaultContainerTypeInSitePage(IOqtaneDatabase database) : base(database)
         {
         }
 

Oqtane.Server/Migrations/02000203_DropDefaultLayoutInSite.cs

@@ -11,7 +11,7 @@ namespace Oqtane.Migrations
     [Migration("Tenant.02.00.02.03")]
     public class DropDefaultLayoutInSite : MultiDatabaseMigration
     {
-        public DropDefaultLayoutInSite(IEnumerable<IOqtaneDatabase> databases) : base(databases)
+        public DropDefaultLayoutInSite(IOqtaneDatabase database) : base(database)
         {
         }
 

Oqtane.Server/Migrations/02010000_AddAppVersionsTableInTenant.cs

@@ -12,7 +12,7 @@ namespace Oqtane.Migrations
     [Migration("Tenant.02.01.00.00")]
     public class AddAppVersionsTable : MultiDatabaseMigration
     {
-        public AddAppVersionsTable(IEnumerable<IOqtaneDatabase> databases) : base(databases)
+        public AddAppVersionsTable(IOqtaneDatabase database) : base(database)
         {
         }
 

Oqtane.Server/Migrations/02010000_AddIndexesForForeignKeyInMaster.cs

@@ -11,7 +11,7 @@ namespace Oqtane.Migrations
     [Migration("Master.02.01.00.00")]
     public class AddIndexesForForeignKeyInMaster : MultiDatabaseMigration
     {
-        public AddIndexesForForeignKeyInMaster(IEnumerable<IOqtaneDatabase> databases) : base(databases)
+        public AddIndexesForForeignKeyInMaster(IOqtaneDatabase database) : base(database)
         {
         }
 

Oqtane.Server/Migrations/02010001_AddDatabaseTypeColumnToTenant.cs

@@ -11,7 +11,7 @@ namespace Oqtane.Migrations
     [Migration("Master.02.01.00.01")]
     public class AddDatabaseTypeColumnToTenant : MultiDatabaseMigration
     {
-        public AddDatabaseTypeColumnToTenant(IEnumerable<IOqtaneDatabase> databases) : base(databases)
+        public AddDatabaseTypeColumnToTenant(IOqtaneDatabase database) : base(database)
         {
         }
 

Oqtane.Server/Migrations/Framework/MultiDatabaseMigration.cs

@@ -7,14 +7,14 @@ namespace Oqtane.Migrations
 {
     public abstract class MultiDatabaseMigration : Migration
     {
-        private readonly IEnumerable<IOqtaneDatabase> _databases;
+        private readonly IOqtaneDatabase _databases;
 
-        protected MultiDatabaseMigration(IEnumerable<IOqtaneDatabase> databases)
+        protected MultiDatabaseMigration(IOqtaneDatabase database)
         {
-            _databases = databases;
+            ActiveDatabase = database;
         }
 
-        protected IOqtaneDatabase ActiveDatabase => _databases.FirstOrDefault(d => d.Provider == ActiveProvider);
+        protected IOqtaneDatabase ActiveDatabase { get; }
 
         protected string RewriteName(string name)
         {

Oqtane.Server/Migrations/Framework/MultiDatabaseMigrationsAssembly.cs

@@ -13,7 +13,7 @@ namespace Oqtane.Migrations.Framework
 {
     public class MultiDatabaseMigrationsAssembly: MigrationsAssembly
     {
-        private readonly IEnumerable<IOqtaneDatabase> _databases;
+        private readonly IOqtaneDatabase _database;
 
         public MultiDatabaseMigrationsAssembly(
             ICurrentDbContext currentContext,
@@ -23,15 +23,15 @@ namespace Oqtane.Migrations.Framework
             : base(currentContext, options, idGenerator, logger)
         {
             var multiDatabaseContext = currentContext.Context as IMultiDatabase;
-            if (multiDatabaseContext != null) _databases = multiDatabaseContext.Databases;
+            if (multiDatabaseContext != null) _database = multiDatabaseContext.ActiveDatabase;
         }
         public override Migration CreateMigration(TypeInfo migrationClass, string activeProvider)
         {
-            var hasCtorWithCacheOptions = migrationClass.GetConstructor(new[] { typeof(IEnumerable<IOqtaneDatabase>) }) != null;
+            var hasCtorWithCacheOptions = migrationClass.GetConstructor(new[] { typeof(IOqtaneDatabase) }) != null;
 
             if (hasCtorWithCacheOptions)
             {
-                var migration = (Migration)Activator.CreateInstance(migrationClass.AsType(), _databases);
+                var migration = (Migration)Activator.CreateInstance(migrationClass.AsType(), _database);
                 if (migration != null)
                 {
                     migration.ActiveProvider = activeProvider;

Oqtane.Server/Modules/HtmlText/Manager/HtmlTextManager.cs

@@ -6,6 +6,7 @@ using Oqtane.Repository;
 using Oqtane.Modules.HtmlText.Models;
 using Oqtane.Modules.HtmlText.Repository;
 using System.Net;
+using Microsoft.AspNetCore.Http;
 using Microsoft.EntityFrameworkCore.Infrastructure;
 using Microsoft.EntityFrameworkCore.Migrations;
 using Oqtane.Enums;
@@ -18,12 +19,15 @@ namespace Oqtane.Modules.HtmlText.Manager
     public class HtmlTextManager : MigratableModuleBase, IInstallable, IPortable
     {
         private readonly IHtmlTextRepository _htmlText;
-        private readonly IEnumerable<IOqtaneDatabase> _databases;
+        private readonly ITenantManager _tenantManager;
+        private readonly IHttpContextAccessor _accessor;
 
-        public HtmlTextManager(IHtmlTextRepository htmlText, IEnumerable<IOqtaneDatabase> databases)
+
+        public HtmlTextManager(IHtmlTextRepository htmlText, ITenantManager tenantManager, IHttpContextAccessor httpContextAccessor)
         {
             _htmlText = htmlText;
-            _databases = databases;
+            _tenantManager = tenantManager;
+            _accessor = httpContextAccessor;
         }
 
         public string ExportModule(Module module)
@@ -57,14 +61,12 @@ namespace Oqtane.Modules.HtmlText.Manager
 
         public bool Install(Tenant tenant, string version)
         {
-            var dbConfig = new DbConfig(null, null, _databases) {ConnectionString = tenant.DBConnectionString, DatabaseType = tenant.DBType};
+            return Migrate(new HtmlTextContext(_tenantManager, _accessor), tenant, MigrationType.Up);
-            return Migrate(new HtmlTextContext(dbConfig, null), tenant, MigrationType.Up);
         }
 
         public bool Uninstall(Tenant tenant)
         {
-            var dbConfig = new DbConfig(null, null, _databases) {ConnectionString = tenant.DBConnectionString, DatabaseType = tenant.DBType};
+            return Migrate(new HtmlTextContext(_tenantManager, _accessor), tenant, MigrationType.Down);
-            return Migrate(new HtmlTextContext(dbConfig, null), tenant, MigrationType.Down);
         }
     }
 }

Oqtane.Server/Modules/HtmlText/Migrations/01000000_InitializeModule.cs

@@ -12,7 +12,7 @@ namespace Oqtane.Modules.HtmlText.Migrations
     [Migration("HtmlText.01.00.00.00")]
     public class InitializeModule : MultiDatabaseMigration
     {
-        public InitializeModule(IEnumerable<IOqtaneDatabase> databases) : base(databases)
+        public InitializeModule(IOqtaneDatabase database) : base(database)
         {
         }
 

Oqtane.Server/Modules/HtmlText/Repository/HtmlTextContext.cs

@@ -1,3 +1,4 @@
+using Microsoft.AspNetCore.Http;
 using Microsoft.EntityFrameworkCore;
 using Oqtane.Infrastructure;
 using Oqtane.Repository;
@@ -10,9 +11,7 @@ namespace Oqtane.Modules.HtmlText.Repository
 {
     public class HtmlTextContext : DBContextBase, IService, IMultiDatabase
     {
-        public HtmlTextContext(IDbConfig dbConfig, ITenantManager tenantManager) : base(dbConfig, tenantManager)
+        public HtmlTextContext(ITenantManager tenantManager, IHttpContextAccessor httpContextAccessor) : base(tenantManager, httpContextAccessor) { }
-        {
-        }
 
         public virtual DbSet<Models.HtmlText> HtmlText { get; set; }
     }

Oqtane.Server/Repository/Context/DBContextBase.cs

@@ -23,7 +23,6 @@ namespace Oqtane.Repository
         private readonly ITenantResolver _tenantResolver;
         private readonly ITenantManager _tenantManager;
         private readonly IHttpContextAccessor _accessor;
-        private readonly IConfiguration _configuration;
         private string _connectionString;
         private string _databaseType;
 
@@ -34,17 +33,7 @@ namespace Oqtane.Repository
             _accessor = httpContextAccessor;
         }
 
-        public DBContextBase(IDbConfig dbConfig, ITenantManager tenantManager)
+        public IOqtaneDatabase ActiveDatabase { get; private set; }
-        {
-            _accessor = dbConfig.Accessor;
-            _configuration = dbConfig.Configuration;
-            _connectionString = dbConfig.ConnectionString;
-            _databaseType = dbConfig.DatabaseType;
-            Databases = dbConfig.Databases;
-            _tenantManager = tenantManager;
-        }
-
-        public IEnumerable<IOqtaneDatabase> Databases { get; }
 
         protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
         {
@@ -69,27 +58,17 @@ namespace Oqtane.Repository
                         .Replace("|DataDirectory|", AppDomain.CurrentDomain.GetData("DataDirectory")?.ToString());
                     _databaseType = tenant.DBType;
                 }
-                else
-                {
-                    if (!String.IsNullOrEmpty(_configuration.GetConnectionString("DefaultConnection")))
-                    {
-                        _connectionString = _configuration.GetConnectionString("DefaultConnection")
-                            .Replace("|DataDirectory|", AppDomain.CurrentDomain.GetData("DataDirectory")?.ToString());
-                    }
-                    _databaseType = _configuration.GetSection(SettingKeys.DatabaseSection)[SettingKeys.DatabaseTypeKey];
-                }
             }
 
-            if (!string.IsNullOrEmpty(_connectionString) && !string.IsNullOrEmpty(_databaseType))
+            if (!String.IsNullOrEmpty(_databaseType))
             {
-                if (Databases != null)
+                var type = Type.GetType(_databaseType);
-                {
+                ActiveDatabase = Activator.CreateInstance(type) as IOqtaneDatabase;
-                    optionsBuilder.UseOqtaneDatabase(Databases.Single(d => d.TypeName == _databaseType), _connectionString);
+            }
-                }
+
-                else
+            if (!string.IsNullOrEmpty(_connectionString) && ActiveDatabase != null)
-                {
+            {
-                    optionsBuilder.UseOqtaneDatabase(_databaseType, _connectionString);
+                optionsBuilder.UseOqtaneDatabase(ActiveDatabase, _connectionString);
-                }
             }
 
             base.OnConfiguring(optionsBuilder);
@@ -99,13 +78,7 @@ namespace Oqtane.Repository
         {
             base.OnModelCreating(builder);
 
-            if (Databases != null)
+            ActiveDatabase.UpdateIdentityStoreTableNames(builder);
-            {
-                var database = Databases.Single(d => d.TypeName == _databaseType);
-
-                database.UpdateIdentityStoreTableNames(builder);
-            }
-
         }
 
         public override int SaveChanges()
@@ -122,17 +95,5 @@ namespace Oqtane.Repository
             _tenantResolver = tenantResolver;
             _accessor = httpContextAccessor;
         }
-
-        [Obsolete("This constructor is obsolete. Use DBContextBase(IDbConfig dbConfig, ITenantManager tenantManager) instead.", false)]
-        public DBContextBase(IDbConfig dbConfig, ITenantResolver tenantResolver)
-        {
-            _accessor = dbConfig.Accessor;
-            _configuration = dbConfig.Configuration;
-            _connectionString = dbConfig.ConnectionString;
-            _databaseType = dbConfig.DatabaseType;
-            Databases = dbConfig.Databases;
-            _tenantResolver = tenantResolver;
-        }
-
     }
 }

Oqtane.Server/Repository/Context/DbConfig.cs

@@ -1,27 +0,0 @@
-using System.Collections.Generic;
-using Microsoft.AspNetCore.Http;
-using Microsoft.Extensions.Configuration;
-using Oqtane.Interfaces;
-
-namespace Oqtane.Repository
-{
-    public class DbConfig : IDbConfig
-    {
-        public DbConfig(IHttpContextAccessor accessor, IConfiguration configuration, IEnumerable<IOqtaneDatabase> databases)
-        {
-            Accessor = accessor;
-            Configuration = configuration;
-            Databases = databases;
-        }
-
-        public IHttpContextAccessor Accessor { get; }
-
-        public IConfiguration Configuration { get; }
-
-        public IEnumerable<IOqtaneDatabase> Databases { get; set; }
-
-        public string ConnectionString { get; set; }
-
-        public string DatabaseType { get; set; }
-    }
-}

Oqtane.Server/Repository/Context/MasterDBContext.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using Microsoft.AspNetCore.Http;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Migrations;
 using Oqtane.Models;
@@ -19,45 +20,43 @@ namespace Oqtane.Repository
 {
     public class MasterDBContext : DbContext, IMultiDatabase
     {
-        private readonly IDbConfig _dbConfig;
+        private readonly IHttpContextAccessor _accessor;
+        private readonly IConfiguration _configuration;
+        private string _connectionString;
+        private string _databaseType;
 
-        public MasterDBContext(DbContextOptions<MasterDBContext> options, IDbConfig dbConfig) : base(options)
+        public MasterDBContext(DbContextOptions<MasterDBContext> options, IHttpContextAccessor accessor, IConfiguration configuration) : base(options)
         {
-            _dbConfig = dbConfig;
+            _accessor = accessor;
-            Databases = dbConfig.Databases;
+            _configuration = configuration;
         }
 
-        public IEnumerable<IOqtaneDatabase> Databases { get; }
+        public IOqtaneDatabase ActiveDatabase { get; private set; }
 
         protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
         {
             optionsBuilder.ReplaceService<IMigrationsAssembly, MultiDatabaseMigrationsAssembly>();
 
-            var connectionString = _dbConfig.ConnectionString;
+            if(_configuration != null)
-            var configuration = _dbConfig.Configuration;
-            var databaseType = _dbConfig.DatabaseType;
-
-            if(string.IsNullOrEmpty(connectionString) && configuration != null)
             {
-                if (!String.IsNullOrEmpty(configuration.GetConnectionString("DefaultConnection")))
+                if (!String.IsNullOrEmpty(_configuration.GetConnectionString("DefaultConnection")))
                 {
-                    connectionString = configuration.GetConnectionString("DefaultConnection")
+                    _connectionString = _configuration.GetConnectionString("DefaultConnection")
                         .Replace("|DataDirectory|", AppDomain.CurrentDomain.GetData("DataDirectory")?.ToString());
                 }
 
-                databaseType = configuration.GetSection(SettingKeys.DatabaseSection)[SettingKeys.DatabaseTypeKey];
+                _databaseType = _configuration.GetSection(SettingKeys.DatabaseSection)[SettingKeys.DatabaseTypeKey];
             }
 
-            if (!string.IsNullOrEmpty(connectionString) && !string.IsNullOrEmpty(databaseType))
+            if (!String.IsNullOrEmpty(_databaseType))
             {
-                if (Databases != null)
+                var type = Type.GetType(_databaseType);
-                {
+                ActiveDatabase = Activator.CreateInstance(type) as IOqtaneDatabase;
-                    optionsBuilder.UseOqtaneDatabase(Databases.Single(d => d.TypeName == databaseType), connectionString);
+            }
-                }
+
-                else
+            if (!string.IsNullOrEmpty(_connectionString) && ActiveDatabase != null)
-                {
+            {
-                    optionsBuilder.UseOqtaneDatabase(databaseType, connectionString);
+                optionsBuilder.UseOqtaneDatabase(ActiveDatabase, _connectionString);
-                }
             }
 
             base.OnConfiguring(optionsBuilder);
@@ -71,7 +70,7 @@ namespace Oqtane.Repository
 
         public override int SaveChanges()
         {
-            DbContextUtils.SaveChanges(this, _dbConfig.Accessor);
+            DbContextUtils.SaveChanges(this, _accessor);
 
             return base.SaveChanges();
         }

Oqtane.Server/Repository/Context/TenantDBContext.cs

@@ -1,3 +1,4 @@
+using Microsoft.AspNetCore.Http;
 using Microsoft.EntityFrameworkCore;
 using Oqtane.Infrastructure;
 using Oqtane.Models;
@@ -11,7 +12,7 @@ namespace Oqtane.Repository
 {
     public class TenantDBContext : DBContextBase, IMultiDatabase
     {
-        public TenantDBContext(IDbConfig dbConfig, ITenantManager tenantManager) : base(dbConfig, tenantManager) { }
+        public TenantDBContext(ITenantManager tenantManager, IHttpContextAccessor httpContextAccessor) : base(tenantManager, httpContextAccessor) { }
 
         public virtual DbSet<Site> Site { get; set; }
         public virtual DbSet<Page> Page { get; set; }

Oqtane.Server/Repository/Interfaces/IDbConfig.cs

@@ -1,20 +0,0 @@
-using System.Collections.Generic;
-using Microsoft.AspNetCore.Http;
-using Microsoft.Extensions.Configuration;
-using Oqtane.Interfaces;
-
-namespace Oqtane.Repository
-{
-    public interface IDbConfig
-    {
-        public IHttpContextAccessor Accessor { get; }
-
-        public IConfiguration Configuration { get; }
-
-        public IEnumerable<IOqtaneDatabase> Databases { get; set; }
-
-        public string ConnectionString { get; set; }
-
-        public string DatabaseType { get; set; }
-    }
-}

Oqtane.Server/Repository/SqlRepository.cs

@@ -14,13 +14,6 @@ namespace Oqtane.Repository
 {
     public class SqlRepository : ISqlRepository
     {
-        private IEnumerable<IOqtaneDatabase> _databases;
-
-        public SqlRepository(IEnumerable<IOqtaneDatabase> databases)
-        {
-            _databases = databases;
-        }
-
         public void ExecuteScript(Tenant tenant, string script)
         {
             // execute script in current tenant
@@ -80,14 +73,13 @@ namespace Oqtane.Repository
 
         public IDataReader ExecuteReader(Tenant tenant, string query)
         {
-            var db = _databases.Single(d => d.TypeName == tenant.DBType);
+            var db = GetActiveDatabase(tenant.DBType);
             return db.ExecuteReader(tenant.DBConnectionString, query);
         }
 
         private int ExecuteNonQuery(string connectionString, string databaseType, string query)
         {
-            var db = _databases.Single(d => d.TypeName == databaseType);
+            var db = GetActiveDatabase(databaseType);
-
             return db.ExecuteNonQuery(connectionString, query);
         }
 
@@ -114,5 +106,17 @@ namespace Oqtane.Repository
 
             return script;
         }
+
+        private IOqtaneDatabase GetActiveDatabase(string databaseType)
+        {
+            IOqtaneDatabase activeDatabase = null;
+            if (!String.IsNullOrEmpty(databaseType))
+            {
+                var type = Type.GetType(databaseType);
+                activeDatabase = Activator.CreateInstance(type) as IOqtaneDatabase;
+            }
+
+            return activeDatabase;
+        }
     }
 }

Oqtane.Server/Startup.cs

@@ -210,7 +210,6 @@ namespace Oqtane
 
             // load the external assemblies into the app domain, install services
             services.AddOqtane(_runtime, _supportedCultures);
-            services.AddScoped<IDbConfig, DbConfig>();
             services.AddDbContext<MasterDBContext>(options => { });
             services.AddDbContext<TenantDBContext>(options => { });
 

Oqtane.Shared/Shared/InstallConfig.cs

@@ -1,9 +1,29 @@
+using System;
+using Oqtane.Interfaces;
+
 namespace Oqtane.Shared
 {
     public class InstallConfig
     {
+        private IOqtaneDatabase _database;
+
         public string ConnectionString { get; set; }
         public string DatabaseType { get; set; }
+
+        public IOqtaneDatabase Database
+        {
+            get
+            {
+                if (_database == null)
+                {
+                    var type = Type.GetType(DatabaseType);
+                    _database = Activator.CreateInstance(type) as IOqtaneDatabase;
+                }
+
+                return _database;
+            }
+        }
+
         public string Aliases { get; set; }
         public string TenantName { get; set; }
         public bool IsNewTenant { get; set; }