Fix GraphQL Implementation and also UI Playground and add supports for Oracle Provider using EF Core ...

Configuration/XDataBaseConfiguration.cs

@@ -24,6 +24,6 @@ namespace xDataService.Configuration
         /// Holds Seeding items ...
         /// nameof(TEntity) => TEntity
         /// </summary>
-        public IDictionary<string, List<dynamic>> SeedItems { get; set; } = new Dictionary<string, List<dynamic>>();
+        public IDictionary<string, List<object>> SeedItems { get; set; } = new Dictionary<string, List<object>>();
     }
 }

Constants/XDbProviders.cs

@@ -6,6 +6,7 @@ namespace xDataService.Constants {
         None,
         MySQL,
         SQLite,
+        Oracle,
         SQLServer,
         MongoDB,
     }
@@ -16,8 +17,9 @@ namespace xDataService.Constants {
     public partial struct ProviderType {
         public const string MySQL = "MYSQL";
         public const string SQLite = "SQLITE";
-        public const string SQLServer = "SQLSERVER";
+        public const string Oracle = "ORACLE";
         public const string MongoDB = "MONGODB";
+        public const string SQLServer = "SQLSERVER";
     }
 
 }

DI/XDIHelperExtension.cs

@@ -1,6 +1,7 @@
 using System;
+using System.Collections.Generic;
 using System.Linq;
-using System.Runtime.InteropServices;
+using GraphQL.Server.Ui.Playground;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.EntityFrameworkCore.Infrastructure;
 using Microsoft.Extensions.Configuration;
@@ -45,10 +46,24 @@ namespace xDataService.DI
                     .ForEach(db =>
                     {
                         //
-                        // TODO: Fix this ...
+                        var seedItemsSectionName = $"{ConfigurationNodeNames.DATA_SERVICE_NODE}:{nameof(XDataServiceConfiguration.Databases)}:{db.Key}:{nameof(XDataBaseConfiguration.SeedItems)}";
-                        var sectionName = $"{ConfigurationNodeNames.DATA_SERVICE_NODE}:{nameof(XDataServiceConfiguration.Databases)}:{db.Key}:{nameof(XDataBaseConfiguration.SeedItems)}";
+                        var section = source.GetSection(seedItemsSectionName);
-                        // var seedItems = source.GetSectionAsDictionary(sectionName);
+                        var sectionJson = source.GetSectionAsJson(seedItemsSectionName);
-                        // db.Value.SeedItems = seedItems;
+                        var sectionDict = sectionJson.FromJSON<Dictionary<string, List<object>>>();
+                        if (!sectionDict.IsNull() &&
+                            sectionDict.Values.HasChild())
+                        {
+                            //
+                            sectionDict
+                                .Keys
+                                .ToList()
+                                .ForEach(entity =>
+                                {
+                                    //
+                                    // Setting Values to Result ...
+                                    result.Databases[db.Key].SeedItems[entity] = sectionDict[entity];
+                                });
+                        }
                     });
             }
 
@@ -248,7 +263,8 @@ namespace xDataService.DI
         public static void UseXDatabase(
             this IApplicationBuilder source,
             XDatabaseDescriptor descriptor,
-            bool isDevelopmentEnvironment = false
+            bool isDevelopmentEnvironment = false,
+            GraphQLPlaygroundOptions options = null
         )
         {
             //
@@ -265,9 +281,9 @@ namespace xDataService.DI
 
             //
             var withPlayground = false;
+            var isGraphConfigured = false;
             if (isDevelopmentEnvironment)
             {
-                //
                 withPlayground = true;
             }
 
@@ -297,6 +313,7 @@ namespace xDataService.DI
 
                                 //
                                 // Check Seeder Exists ...
+                                // Execute Seeding Data Task if Exists ...
                                 isValid = r.HasSeeder();
                                 if (isValid)
                                 {
@@ -312,7 +329,8 @@ namespace xDataService.DI
                                         // Seeding ...
                                         seeder
                                             .Seed()
-                                            .RunTask();
+                                            .GetAwaiter()
+                                            .GetResult();
                                     }
                                 }
 
@@ -323,7 +341,10 @@ namespace xDataService.DI
                                 {
                                     //
                                     // Use WebSockets ...
-                                    source.UseWebSockets();
+                                    if (!isGraphConfigured)
+                                    {
+                                        source.UseWebSockets();
+                                    }
 
                                     //
                                     // Inject GraphQL Type Helper ...
@@ -332,7 +353,9 @@ namespace xDataService.DI
                                     if (isValid)
                                     {
                                         //
-                                        string graphPath = helper.GetGraphQLPath();
+                                        string graphPath = $"{helper.GetGraphQLPath()}";
+                                        // string graphPath = $"{dataServiceConfiguration.GraphQLBasePath}{helper.GetGraphQLPath()}";
+                                        graphPath = $"{helper.GetGraphQLPath()}";
                                         typeof(XDataServiceHelper).InvokeGenericMethod(
                                             methodName: "UseXGraphQL",
                                             runtimeTypes: [
@@ -352,6 +375,15 @@ namespace xDataService.DI
                                                 null
                                             ]
                                         );
+
+                                        //
+                                        Log($"Register GraphQL: {graphPath}");
+                                    }
+
+                                    //
+                                    if (!isGraphConfigured)
+                                    {
+                                        isGraphConfigured = true;
                                     }
                                 }
                             });

GraphQL/XBaseGraphQLQuery.cs

@@ -11,16 +11,17 @@ using xModels.Base;
 
 namespace xDataService.GraphQL
 {
-    public abstract class XBaseGraphQLQuery : ObjectGraphType, IXBaseGraphQLQuery { }
+    public abstract class XBaseGraphQLQuery<TEntity, TKey, TGraph, TGraphKey> : ObjectGraphType, IXBaseGraphQLQuery<TEntity, TKey, TGraph, TGraphKey>
-
-    public abstract class XBaseGraphQLQuery<TEntity, TKey> : XBaseGraphQLQuery, IXBaseGraphQLQuery<TEntity, TKey>
     where TEntity : XBaseEntity<TKey>
+    where TGraph : IGraphType
+    where TGraphKey : IGraphType
     {
         //
         protected readonly XDataServiceConfiguration configuration;
         protected readonly IXBaseRepository<TEntity, TKey> repository;
         protected readonly IXBaseGraphQLTypeHelper<TEntity, TKey> helper;
 
+        //
         public XBaseGraphQLQuery(
             XDataServiceConfiguration configuration,
             IXBaseRepository<TEntity, TKey> repository,
@@ -34,25 +35,7 @@ namespace xDataService.GraphQL
 
             //
             Name = GetType().Name;
-        }
-    }
 
-    public abstract class XBaseGraphQLQuery<TEntity, TKey, TGraph, TGraphKey> : XBaseGraphQLQuery<TEntity, TKey>, IXBaseGraphQLQuery<TEntity, TKey, TGraph, TGraphKey>
-    where TEntity : XBaseEntity<TKey>
-    where TGraph : IGraphType
-    where TGraphKey : IGraphType
-    {
-        //
-        public XBaseGraphQLQuery(
-            XDataServiceConfiguration configuration,
-            IXBaseRepository<TEntity, TKey> repository,
-            IXBaseGraphQLTypeHelper<TEntity, TKey> helper
-        ) : base(
-            helper: helper,
-            repository: repository,
-            configuration: configuration
-        )
-        {
             //
             #region Retrieve ...
             //

GraphQL/XBaseGraphQLTypeHelper.cs

@@ -5,94 +5,52 @@ using xModels.Base;
 
 namespace xDataService.GraphQL
 {
-    public abstract class XBaseGraphQLTypeHelper : IXBaseGraphQLTypeHelper
+    public abstract class XBaseGraphQLTypeHelper<TEntity, TKey> : IXBaseGraphQLTypeHelper<TEntity, TKey>
+    where TEntity : XBaseEntity<TKey>
     {
         //
-        protected readonly XDataServiceConfiguration configuration;
+        private readonly XDataServiceConfiguration configuration;
 
         //
         public XBaseGraphQLTypeHelper(
-            XDataServiceConfiguration configuration
+            XDataServiceConfiguration configuration = null
         )
         {
             this.configuration = configuration;
         }
 
-        public abstract string GetInQuerySingleName();
+        //
-
         public abstract string GetInQueryCollectionName();
 
-        //
+        public abstract string GetInQuerySingleName();
-        #region Actions ...
-        public virtual string GetCountName()
-        {
-            return string.Empty;
-        }
-
-        public virtual string GetExistsName()
-        {
-            return string.Empty;
-        }
-
-        public virtual string GetFindManyName()
-        {
-            return string.Empty;
-        }
-
-        public virtual string GetFindOneName()
-        {
-            return string.Empty;
-        }
-
-        public virtual string GetGraphQLPath(string baseGraphPath = null)
-        {
-            return string.Empty;
-        }
-
-        public virtual string GetQueryName()
-        {
-            return string.Empty;
-        }
-        #endregion
-    }
-
-    public abstract class XBaseGraphQLTypeHelper<TEntity, TKey> : XBaseGraphQLTypeHelper, IXBaseGraphQLTypeHelper<TEntity, TKey>
-    where TEntity : XBaseEntity<TKey>
-    {
-        //
-        public XBaseGraphQLTypeHelper(
-            XDataServiceConfiguration configuration = null
-        ) : base(configuration)
-        { }
 
         //
-        #region Actions ...
+        public string GetFindOneName()
-        public override string GetFindOneName()
         {
             return $"find{GetInQuerySingleName().ToNormalString().Capitalize()}";
         }
 
-        public override string GetFindManyName()
+        public string GetFindManyName()
         {
             return $"find{GetInQueryCollectionName().ToNormalString().Capitalize()}";
         }
 
-        public override string GetQueryName()
+        public string GetQueryName()
         {
             return $"query{GetInQueryCollectionName().ToNormalString().Capitalize()}";
         }
 
-        public override string GetCountName()
+        public string GetCountName()
         {
             return $"count{GetInQueryCollectionName().ToNormalString().Capitalize()}";
         }
 
-        public override string GetExistsName()
+        public string GetExistsName()
         {
             return $"exists{GetInQuerySingleName().ToNormalString().Capitalize()}";
         }
 
-        public override string GetGraphQLPath(string baseGraphPath = null)
+        public string GetGraphQLPath(string baseGraphPath = null)
         {
             //
             baseGraphPath = baseGraphPath.IsNullOrEmpty() ?
@@ -111,6 +69,5 @@ namespace xDataService.GraphQL
             //
             return $"{basePath}/{GetInQueryCollectionName().ToNormalString()}";
         }
-        #endregion
     }
 }

Helpers/XDataServiceHelper.cs

@@ -1,4 +1,5 @@
 using System;
+using GraphQL;
 using GraphQL.Server;
 using GraphQL.Server.Ui.Playground;
 using GraphQL.Types;
@@ -83,6 +84,21 @@ namespace xDataService.Helpers
                     }, lifetime);
                     break;
 
+                //
+                // Oracle ...
+                case XDbProviders.Oracle:
+                    //
+                    source.AddEntityFrameworkOracle();
+                    source.AddDbContext<TContext>(cfg =>
+                    {
+                        //
+                        cfg.UseOracle(
+                            databaseDescriptor.ConnectionString,
+                            databaseDescriptor.OptionsBuilder
+                        );
+                    }, lifetime);
+                    break;
+
                 //
                 // SQLServer ...
                 case XDbProviders.SQLServer:
@@ -153,6 +169,7 @@ namespace xDataService.Helpers
             isValid =
                 databaseDescriptor.Provider == XDbProviders.MySQL ||
                 databaseDescriptor.Provider == XDbProviders.SQLite ||
+                databaseDescriptor.Provider == XDbProviders.Oracle ||
                 databaseDescriptor.Provider == XDbProviders.SQLServer;
             if (isValid)
             {
@@ -1223,22 +1240,118 @@ namespace xDataService.Helpers
         where TGraphTypeHelperImplementation : XBaseGraphQLTypeHelper<TEntity, TKey>
         {
             //
+            // Validate Args ...
             var isValid = repositoryDescriptor.IsValid();
             if (!isValid)
             {
                 return;
             }
 
+            //
+            // Chck Seeders ...
+            isValid = repositoryDescriptor.HasSeeder();
+            if (isValid)
+            {
+            }
+
             //
             // GraphQL ...
             isValid = repositoryDescriptor.HasGraphSupport();
             if (isValid)
             {
                 //
-                UseXGraphQL<TEntity, TKey, TGraph, TGraphKey, TGraphQuery, TGraphTypeHelperService, TGraphTypeHelperImplementation, TGraphSchema>(
+                // UseXGraphQL<TEntity, TKey, TGraph, TGraphKey, TGraphQuery, TGraphTypeHelperService, TGraphTypeHelperImplementation, TGraphSchema>(
-                    source,
+                //     source,
-                    repositoryDescriptor
+                //     repositoryDescriptor
-                );
+                // );
+            }
+        }
+
+        /// <summary>
+        /// Register Repository ...
+        /// </summary>
+        /// <param name="source"></param>
+        /// <param name="repositoryDescriptor"></param>
+        /// <param name="lifetime"></param>
+        /// <typeparam name="TEntity"></typeparam>
+        /// <typeparam name="TKey"></typeparam>
+        /// <typeparam name="TKeyGeneratorService"></typeparam>
+        /// <typeparam name="TKeyGeneratorImplementation"></typeparam>
+        /// <typeparam name="TEventsService"></typeparam>
+        /// <typeparam name="TEventsImplementation"></typeparam>
+        /// <typeparam name="TGraph"></typeparam>
+        /// <typeparam name="TGraphKey"></typeparam>
+        /// <typeparam name="TGraphQuery"></typeparam>
+        /// <typeparam name="TGraphTypeHelperService"></typeparam>
+        /// <typeparam name="TGraphTypeHelperImplementation"></typeparam>
+        /// <typeparam name="TGraphSchema"></typeparam>
+        /// <typeparam name="TRepositoryService"></typeparam>
+        /// <typeparam name="TRepositoryImplementation"></typeparam>
+        /// <typeparam name="TSeederService"></typeparam>
+        /// <typeparam name="TSeederImplementation"></typeparam>
+        /// <returns></returns>
+        public static void UseXRepository<
+            TEntity,
+            TKey,
+            TKeyGeneratorService,
+            TKeyGeneratorImplementation,
+            TEventsService,
+            TEventsImplementation,
+            TGraph,
+            TGraphKey,
+            TGraphQuery,
+            TGraphTypeHelperService,
+            TGraphTypeHelperImplementation,
+            TGraphSchema,
+            TRepositoryService,
+            TRepositoryImplementation,
+            TSeederService,
+            TSeederImplementation
+        >(
+            IApplicationBuilder source,
+            XInMemoryRepositoryDescriptor<TEntity, TKey, TKeyGeneratorService, TKeyGeneratorImplementation, TEventsService, TEventsImplementation, TGraph, TGraphKey, TGraphQuery, TGraphTypeHelperService, TGraphTypeHelperImplementation, TGraphSchema, TRepositoryService, TRepositoryImplementation, TSeederService, TSeederImplementation> repositoryDescriptor
+        )
+        where TGraphSchema : Schema
+        where TGraphKey : IGraphType
+        where TEntity : XBaseEntity<TKey>
+        where TGraph : XBaseGraphObjectType<TEntity, TKey>
+        where TSeederService : IXBaseDbSeeder<TEntity, TKey>
+        where TEventsService : IXBaseRepositoryEvents<TEntity>
+        where TSeederImplementation : XBaseDbSeeder<TEntity, TKey>
+        where TKeyGeneratorService : IXKeyGenerator<TEntity, TKey>
+        where TRepositoryService : IXBaseRepository<TEntity, TKey>
+        where TEventsImplementation : XBaseRepositoryEvents<TEntity>
+        where TKeyGeneratorImplementation : XKeyGenerator<TEntity, TKey>
+        where TGraphTypeHelperService : IXBaseGraphQLTypeHelper<TEntity, TKey>
+        where TRepositoryImplementation : XBaseInMemoryRepository<TEntity, TKey>
+        where TGraphQuery : XBaseGraphQLQuery<TEntity, TKey, TGraph, TGraphKey>
+        where TGraphTypeHelperImplementation : XBaseGraphQLTypeHelper<TEntity, TKey>
+        {
+            //
+            // Validate Args ...
+            var isValid = repositoryDescriptor.IsValid();
+            if (!isValid)
+            {
+                return;
+            }
+
+            //
+            // Chck Seeders ...
+            isValid = repositoryDescriptor.HasSeeder();
+            if (isValid)
+            {
+            }
+
+            //
+            // GraphQL ...
+            isValid = repositoryDescriptor.HasGraphSupport();
+            if (isValid)
+            {
+                //
+                // UseXGraphQL<TEntity, TKey, TGraph, TGraphKey, TGraphQuery, TGraphTypeHelperService, TGraphTypeHelperImplementation, TGraphSchema>(
+                //     source,
+                //     repositoryDescriptor
+                // );
             }
         }
 
@@ -1297,101 +1410,311 @@ namespace xDataService.Helpers
         where TGraphTypeHelperImplementation : XBaseGraphQLTypeHelper<TEntity, TKey>
         {
             //
+            // Validate Args ...
             var isValid = repositoryDescriptor.IsValid();
             if (!isValid)
             {
                 return;
             }
 
+            //
+            // Chck Seeders ...
+            isValid = repositoryDescriptor.HasSeeder();
+            if (isValid)
+            {
+            }
+
             //
             // GraphQL ...
             isValid = repositoryDescriptor.HasGraphSupport();
             if (isValid)
             {
                 //
-                UseXGraphQL<TEntity, TKey, TGraph, TGraphKey, TGraphQuery, TGraphTypeHelperService, TGraphTypeHelperImplementation, TGraphSchema>(
+                // UseXGraphQL<TEntity, TKey, TGraph, TGraphKey, TGraphQuery, TGraphTypeHelperService, TGraphTypeHelperImplementation, TGraphSchema>(
-                    source,
+                //     source,
-                    repositoryDescriptor
+                //     repositoryDescriptor
-                );
+                // );
             }
         }
 
-        // /// <summary>
+        /// <summary>
-        // /// Register Repository ...
+        /// Register Repository ...
-        // /// </summary>
+        /// </summary>
-        // /// <param name="source"></param>
+        /// <param name="source"></param>
-        // /// <param name="repositoryDescriptor"></param>
+        /// <param name="repositoryDescriptor"></param>
-        // /// <typeparam name="TEntity"></typeparam>
+        /// <param name="lifetime"></param>
-        // /// <typeparam name="TKey"></typeparam>
+        /// <typeparam name="TEntity"></typeparam>
-        // /// <typeparam name="TKeyGeneratorService"></typeparam>
+        /// <typeparam name="TKey"></typeparam>
-        // /// <typeparam name="TKeyGeneratorImplementation"></typeparam>
+        /// <typeparam name="TKeyGeneratorService"></typeparam>
-        // /// <typeparam name="TEventsService"></typeparam>
+        /// <typeparam name="TKeyGeneratorImplementation"></typeparam>
-        // /// <typeparam name="TEventsImplementation"></typeparam>
+        /// <typeparam name="TEventsService"></typeparam>
-        // /// <typeparam name="TGraph"></typeparam>
+        /// <typeparam name="TEventsImplementation"></typeparam>
-        // /// <typeparam name="TGraphKey"></typeparam>
+        /// <typeparam name="TGraph"></typeparam>
-        // /// <typeparam name="TGraphQuery"></typeparam>
+        /// <typeparam name="TGraphKey"></typeparam>
-        // /// <typeparam name="TGraphTypeHelperService"></typeparam>
+        /// <typeparam name="TGraphQuery"></typeparam>
-        // /// <typeparam name="TGraphTypeHelperImplementation"></typeparam>
+        /// <typeparam name="TGraphTypeHelperService"></typeparam>
-        // /// <typeparam name="TGraphSchema"></typeparam>
+        /// <typeparam name="TGraphTypeHelperImplementation"></typeparam>
-        // /// <typeparam name="TRepositoryService"></typeparam>
+        /// <typeparam name="TGraphSchema"></typeparam>
-        // /// <typeparam name="TRepositoryImplementation"></typeparam>
+        /// <typeparam name="TRepositoryService"></typeparam>
-        // /// <typeparam name="TContext"></typeparam>
+        /// <typeparam name="TRepositoryImplementation"></typeparam>
-        // /// <returns></returns>
+        /// <typeparam name="TSeederService"></typeparam>
-        // public static void UseXRepository<
+        /// <typeparam name="TSeederImplementation"></typeparam>
-        //     TEntity,
+        /// <returns></returns>
-        //     TKey,
+        public static void UseXRepository<
-        //     TKeyGeneratorService,
+            TEntity,
-        //     TKeyGeneratorImplementation,
+            TKey,
-        //     TEventsService,
+            TKeyGeneratorService,
-        //     TEventsImplementation,
+            TKeyGeneratorImplementation,
-        //     TGraph,
+            TEventsService,
-        //     TGraphKey,
+            TEventsImplementation,
-        //     TGraphQuery,
+            TGraph,
-        //     TGraphTypeHelperService,
+            TGraphKey,
-        //     TGraphTypeHelperImplementation,
+            TGraphQuery,
-        //     TGraphSchema,
+            TGraphTypeHelperService,
-        //     TRepositoryService,
+            TGraphTypeHelperImplementation,
-        //     TRepositoryImplementation,
+            TGraphSchema,
-        //     TContext
+            TRepositoryService,
-        // >(
+            TRepositoryImplementation,
-        //     IApplicationBuilder source,
+            TSeederService,
-        //     XEFRepositoryDescriptor<TEntity, TKey, TKeyGeneratorService, TKeyGeneratorImplementation, TEventsService, TEventsImplementation, TGraph, TGraphKey, TGraphQuery, TGraphTypeHelperService, TGraphTypeHelperImplementation, TGraphSchema, TRepositoryService, TRepositoryImplementation, TContext> repositoryDescriptor
+            TSeederImplementation            
-        // )
+        >(
-        // where TGraphSchema : Schema
+            IApplicationBuilder source,
-        // where TContext : XDbContext
+            XMongoRepositoryDescriptor<TEntity, TKey, TKeyGeneratorService, TKeyGeneratorImplementation, TEventsService, TEventsImplementation, TGraph, TGraphKey, TGraphQuery, TGraphTypeHelperService, TGraphTypeHelperImplementation, TGraphSchema, TRepositoryService, TRepositoryImplementation, TSeederService, TSeederImplementation> repositoryDescriptor
-        // where TGraphKey : IGraphType
+        )
-        // where TEntity : XBaseEntity<TKey>
+        where TGraphSchema : Schema
-        // where TGraph : XBaseGraphObjectType<TEntity, TKey>
+        where TGraphKey : IGraphType
-        // where TEventsService : IXBaseRepositoryEvents<TEntity>
+        where TEntity : XBaseEntity<TKey>
-        // where TKeyGeneratorService : IXKeyGenerator<TEntity, TKey>
+        where TGraph : XBaseGraphObjectType<TEntity, TKey>
-        // where TRepositoryService : IXBaseRepository<TEntity, TKey>
+        where TSeederService : IXBaseDbSeeder<TEntity, TKey>
-        // where TEventsImplementation : XBaseRepositoryEvents<TEntity>
+        where TEventsService : IXBaseRepositoryEvents<TEntity>
-        // where TKeyGeneratorImplementation : XKeyGenerator<TEntity, TKey>
+        where TSeederImplementation : XBaseDbSeeder<TEntity, TKey>
-        // where TGraphTypeHelperService : IXBaseGraphQLTypeHelper<TEntity, TKey>
+        where TKeyGeneratorService : IXKeyGenerator<TEntity, TKey>
-        // where TGraphQuery : XBaseGraphQLQuery<TEntity, TKey, TGraph, TGraphKey>
+        where TRepositoryService : IXBaseRepository<TEntity, TKey>
-        // where TRepositoryImplementation : XBaseEFRepository<TEntity, TKey, TContext>
+        where TEventsImplementation : XBaseRepositoryEvents<TEntity>
-        // where TGraphTypeHelperImplementation : XBaseGraphQLTypeHelper<TEntity, TKey>
+        where TKeyGeneratorImplementation : XKeyGenerator<TEntity, TKey>
-        // {
+        where TRepositoryImplementation : XBaseMongoRepository<TEntity, TKey>
-        //     //
+        where TGraphTypeHelperService : IXBaseGraphQLTypeHelper<TEntity, TKey>
-        //     var isValid = repositoryDescriptor.IsValid();
+        where TGraphQuery : XBaseGraphQLQuery<TEntity, TKey, TGraph, TGraphKey>
-        //     if (!isValid)
+        where TGraphTypeHelperImplementation : XBaseGraphQLTypeHelper<TEntity, TKey>
-        //     {
+        {
-        //         return;
+            //
-        //     }
+            // Validate Args ...
+            var isValid = repositoryDescriptor.IsValid();
+            if (!isValid)
+            {
+                return;
+            }
 
-        //     //
+            //
-        //     // GraphQL ...
+            // Chck Seeders ...
-        //     isValid = repositoryDescriptor.HasGraphSupport();
+            isValid = repositoryDescriptor.HasSeeder();
-        //     if (isValid)
+            if (isValid)
-        //     {
+            {
-        //         //
+            }
-        //         UseXGraphQL<TEntity, TKey, TGraph, TGraphKey, TGraphQuery, TGraphTypeHelperService, TGraphTypeHelperImplementation, TGraphSchema>(
-        //             source,
-        //             repositoryDescriptor
-        //         );
-        //     }
-        // }
 
+            //
+            // GraphQL ...
+            isValid = repositoryDescriptor.HasGraphSupport();
+            if (isValid)
+            {
+                //
+                // UseXGraphQL<TEntity, TKey, TGraph, TGraphKey, TGraphQuery, TGraphTypeHelperService, TGraphTypeHelperImplementation, TGraphSchema>(
+                //     source,
+                //     repositoryDescriptor
+                // );
+            }
+        }
+
+        /// <summary>
+        /// Register Repository ...
+        /// </summary>
+        /// <param name="source"></param>
+        /// <param name="repositoryDescriptor"></param>
+        /// <param name="lifetime"></param>
+        /// <typeparam name="TEntity"></typeparam>
+        /// <typeparam name="TKey"></typeparam>
+        /// <typeparam name="TKeyGeneratorService"></typeparam>
+        /// <typeparam name="TKeyGeneratorImplementation"></typeparam>
+        /// <typeparam name="TEventsService"></typeparam>
+        /// <typeparam name="TEventsImplementation"></typeparam>
+        /// <typeparam name="TGraph"></typeparam>
+        /// <typeparam name="TGraphKey"></typeparam>
+        /// <typeparam name="TGraphQuery"></typeparam>
+        /// <typeparam name="TGraphTypeHelperService"></typeparam>
+        /// <typeparam name="TGraphTypeHelperImplementation"></typeparam>
+        /// <typeparam name="TGraphSchema"></typeparam>
+        /// <typeparam name="TRepositoryService"></typeparam>
+        /// <typeparam name="TRepositoryImplementation"></typeparam>
+        /// <returns></returns>
+        public static void UseXRepository<
+            TEntity,
+            TKey,
+            TKeyGeneratorService,
+            TKeyGeneratorImplementation,
+            TEventsService,
+            TEventsImplementation,
+            TGraph,
+            TGraphKey,
+            TGraphQuery,
+            TGraphTypeHelperService,
+            TGraphTypeHelperImplementation,
+            TGraphSchema,
+            TRepositoryService,
+            TRepositoryImplementation,
+            TContext
+        >(
+            IApplicationBuilder source,
+            XEFRepositoryDescriptor<TEntity, TKey, TKeyGeneratorService, TKeyGeneratorImplementation, TEventsService, TEventsImplementation, TGraph, TGraphKey, TGraphQuery, TGraphTypeHelperService, TGraphTypeHelperImplementation, TGraphSchema, TRepositoryService, TRepositoryImplementation, TContext> repositoryDescriptor
+        )
+        where TGraphSchema : Schema
+        where TContext : XDbContext
+        where TGraphKey : IGraphType
+        where TEntity : XBaseEntity<TKey>
+        where TGraph : XBaseGraphObjectType<TEntity, TKey>
+        where TEventsService : IXBaseRepositoryEvents<TEntity>
+        where TKeyGeneratorService : IXKeyGenerator<TEntity, TKey>
+        where TRepositoryService : IXBaseRepository<TEntity, TKey>
+        where TEventsImplementation : XBaseRepositoryEvents<TEntity>
+        where TKeyGeneratorImplementation : XKeyGenerator<TEntity, TKey>
+        where TGraphTypeHelperService : IXBaseGraphQLTypeHelper<TEntity, TKey>
+        where TGraphQuery : XBaseGraphQLQuery<TEntity, TKey, TGraph, TGraphKey>
+        where TRepositoryImplementation : XBaseEFRepository<TEntity, TKey, TContext>
+        where TGraphTypeHelperImplementation : XBaseGraphQLTypeHelper<TEntity, TKey>
+        {
+            //
+            // Validate Args ...
+            var isValid = repositoryDescriptor.IsValid();
+            if (!isValid)
+            {
+                return;
+            }
+
+            //
+            // Chck Seeders ...
+            isValid = repositoryDescriptor.HasSeeder();
+            if (isValid)
+            {
+            }
+
+            //
+            // GraphQL ...
+            isValid = repositoryDescriptor.HasGraphSupport();
+            if (isValid)
+            {
+                // //
+                // UseXGraphQL<TEntity, TKey, TGraph, TGraphKey, TGraphQuery, TGraphTypeHelperService, TGraphTypeHelperImplementation, TGraphSchema>(
+                //     source,
+                //     repositoryDescriptor
+                // );
+            }
+        }
+
+        /// <summary>
+        /// Register Repository ...
+        /// </summary>
+        /// <param name="source"></param>
+        /// <param name="repositoryDescriptor"></param>
+        /// <param name="lifetime"></param>
+        /// <typeparam name="TEntity"></typeparam>
+        /// <typeparam name="TKey"></typeparam>
+        /// <typeparam name="TKeyGeneratorService"></typeparam>
+        /// <typeparam name="TKeyGeneratorImplementation"></typeparam>
+        /// <typeparam name="TEventsService"></typeparam>
+        /// <typeparam name="TEventsImplementation"></typeparam>
+        /// <typeparam name="TGraph"></typeparam>
+        /// <typeparam name="TGraphKey"></typeparam>
+        /// <typeparam name="TGraphQuery"></typeparam>
+        /// <typeparam name="TGraphTypeHelperService"></typeparam>
+        /// <typeparam name="TGraphTypeHelperImplementation"></typeparam>
+        /// <typeparam name="TGraphSchema"></typeparam>
+        /// <typeparam name="TRepositoryService"></typeparam>
+        /// <typeparam name="TRepositoryImplementation"></typeparam>
+        /// <typeparam name="TSeederService"></typeparam>
+        /// <typeparam name="TSeederImplementation"></typeparam>
+        /// <returns></returns>
+        public static void UseXRepository<
+            TEntity,
+            TKey,
+            TKeyGeneratorService,
+            TKeyGeneratorImplementation,
+            TEventsService,
+            TEventsImplementation,
+            TGraph,
+            TGraphKey,
+            TGraphQuery,
+            TGraphTypeHelperService,
+            TGraphTypeHelperImplementation,
+            TGraphSchema,
+            TRepositoryService,
+            TRepositoryImplementation,
+            TContext,
+            TSeederService,
+            TSeederImplementation
+        >(
+            IApplicationBuilder source,
+            XEFRepositoryDescriptor<TEntity, TKey, TKeyGeneratorService, TKeyGeneratorImplementation, TEventsService, TEventsImplementation, TGraph, TGraphKey, TGraphQuery, TGraphTypeHelperService, TGraphTypeHelperImplementation, TGraphSchema, TRepositoryService, TRepositoryImplementation, TContext, TSeederService, TSeederImplementation> repositoryDescriptor
+        )
+        where TGraphSchema : Schema
+        where TContext : XDbContext
+        where TGraphKey : IGraphType
+        where TEntity : XBaseEntity<TKey>
+        where TGraph : XBaseGraphObjectType<TEntity, TKey>
+        where TSeederService : IXBaseDbSeeder<TEntity, TKey>
+        where TEventsService : IXBaseRepositoryEvents<TEntity>
+        where TSeederImplementation : XBaseDbSeeder<TEntity, TKey>
+        where TKeyGeneratorService : IXKeyGenerator<TEntity, TKey>
+        where TRepositoryService : IXBaseRepository<TEntity, TKey>
+        where TEventsImplementation : XBaseRepositoryEvents<TEntity>
+        where TKeyGeneratorImplementation : XKeyGenerator<TEntity, TKey>
+        where TGraphTypeHelperService : IXBaseGraphQLTypeHelper<TEntity, TKey>
+        where TGraphQuery : XBaseGraphQLQuery<TEntity, TKey, TGraph, TGraphKey>
+        where TRepositoryImplementation : XBaseEFRepository<TEntity, TKey, TContext>
+        where TGraphTypeHelperImplementation : XBaseGraphQLTypeHelper<TEntity, TKey>
+        {
+            //
+            // Validate Args ...
+            var isValid = repositoryDescriptor.IsValid();
+            if (!isValid)
+            {
+                return;
+            }
+
+            //
+            // Chck Seeders ...
+            isValid = repositoryDescriptor.HasSeeder();
+            if (isValid)
+            {
+            }
+
+            //
+            // GraphQL ...
+            isValid = repositoryDescriptor.HasGraphSupport();
+            if (isValid)
+            {
+                // //
+                // UseXGraphQL<TEntity, TKey, TGraph, TGraphKey, TGraphQuery, TGraphTypeHelperService, TGraphTypeHelperImplementation, TGraphSchema>(
+                //     source,
+                //     repositoryDescriptor
+                // );
+            }
+        }
+
+
+        /// <summary>
+        /// Use GraphQL ...
+        /// </summary>
+        /// <typeparam name="TEntity"></typeparam>
+        /// <typeparam name="TKey"></typeparam>
+        /// <typeparam name="TGraph"></typeparam>
+        /// <typeparam name="TGraphKey"></typeparam>
+        /// <typeparam name="TGraphQuery"></typeparam>
+        /// <typeparam name="TGraphTypeHelperService"></typeparam>
+        /// <typeparam name="TGraphTypeHelperImplementation"></typeparam>
+        /// <typeparam name="TGraphSchema"></typeparam>
+        /// <param name="source"></param>
+        /// <param name="graphPath"></param>
+        /// <param name="withPlayGround"></param>
+        /// <param name="options"></param>
         public static void UseXGraphQL<
             TEntity,
             TKey,
@@ -1422,6 +1745,14 @@ namespace xDataService.Helpers
             //
             if (withPlayGround)
             {
+                //
+                if (options.IsNull())
+                {
+                    options = new GraphQLPlaygroundOptions();
+                }
+                options.Path = "/ui/playground";
+
+                //
                 source.UseGraphQLPlayground(options);
             }
         }
@@ -1600,43 +1931,13 @@ namespace xDataService.Helpers
                 return;
             }
 
-            //
-            // Register Graph Schema ...
-            source.Add(
-                new ServiceDescriptor(
-                    repositoryDescriptor.GraphSchema,
-                    repositoryDescriptor.GraphSchema,
-                    lifetime
-                )
-            );
-
-            //
-            // Register Graph Query ...
-            source.Add(
-                new ServiceDescriptor(
-                    repositoryDescriptor.GraphQuery,
-                    repositoryDescriptor.GraphQuery,
-                    lifetime
-                )
-            );
-
-            //
-            // Register Graph Type Helper ...
-            source.Add(
-                new ServiceDescriptor(
-                    repositoryDescriptor.GraphTypeHelperService,
-                    repositoryDescriptor.GraphTypeHelperImplementation,
-                    lifetime: ServiceLifetime.Singleton
-                )
-            );
-
             //
             // Register Graph Type ...
             source.Add(
                 new ServiceDescriptor(
-                    repositoryDescriptor.GraphType,
+                    lifetime: ServiceLifetime.Singleton,
-                    repositoryDescriptor.GraphType,
+                    serviceType: repositoryDescriptor.GraphType,
-                    ServiceLifetime.Singleton
+                    implementationType: repositoryDescriptor.GraphType
                 )
             );
 
@@ -1644,19 +1945,60 @@ namespace xDataService.Helpers
             // Register Graph Events ...
             source.Add(
                 new ServiceDescriptor(
-                    typeof(XBaseGraphQLEventType<TEntity, TKey, TGraph>),
+                    lifetime: ServiceLifetime.Singleton,
-                    typeof(XBaseGraphQLEventType<TEntity, TKey, TGraph>),
+                    serviceType: typeof(XBaseGraphQLEventType<TEntity, TKey, TGraph>),
-                    ServiceLifetime.Singleton
+                    implementationType: typeof(XBaseGraphQLEventType<TEntity, TKey, TGraph>)
                 )
             );
 
+            //
+            // Register Graph Type Helper ...
+            source.Add(
+                new ServiceDescriptor(
+                    lifetime: ServiceLifetime.Singleton,
+                    serviceType: repositoryDescriptor.GraphTypeHelperService,
+                    implementationType: repositoryDescriptor.GraphTypeHelperImplementation
+                )
+            );
+
+            //
+            // Register Graph Query ...
+            source.Add(
+                new ServiceDescriptor(
+                    lifetime: lifetime,
+                    serviceType: repositoryDescriptor.GraphQuery,
+                    implementationType: repositoryDescriptor.GraphQuery
+                )
+            );
+
+            //
+            // Register Graph Schema ...
+            source.Add(
+                new ServiceDescriptor(
+                    serviceType: repositoryDescriptor.GraphSchema,
+                    implementationType: repositoryDescriptor.GraphSchema,
+                    lifetime: lifetime
+                )
+            );
+
+            //
+            source.AddSingleton<IDocumentExecuter, DocumentExecuter>();
+
             //
             // Register Graph Type Schema ...
             var builder = source.GetRegisteredService<IGraphQLBuilder>();
             if (builder.IsNull())
             {
                 //
-                Action<GraphQLOptions> options = x => { };
+                Action<GraphQLOptions> options = x =>
+                {
+                    //
+                    x.EnableMetrics = true;
+                    x.UnhandledExceptionDelegate = context =>
+                    {
+                        Console.WriteLine("XGraphQL Error: " + context.OriginalException.Message);
+                    };
+                };
                 builder = source.AddGraphQL(options)
                     .AddNewtonsoftJson(deserializerSettings => { }, serializerSettings => { })
                     .AddWebSockets()
@@ -1665,72 +2007,6 @@ namespace xDataService.Helpers
             }
             builder.AddGraphTypes(repositoryDescriptor.GraphSchema);
         }
-
-        /// <summary>
-        /// Use GraphQL Middleware ...
-        /// </summary>
-        /// <param name="source"></param>
-        /// <param name="repositoryDescriptor"></param>
-        /// <param name="lifetime"></param>
-        /// <typeparam name="TEntity"></typeparam>
-        /// <typeparam name="TKey"></typeparam>
-        /// <typeparam name="TGraph"></typeparam>
-        /// <typeparam name="TGraphKey"></typeparam>
-        /// <typeparam name="TGraphQuery"></typeparam>
-        /// <typeparam name="TGraphTypeHelperService"></typeparam>
-        /// <typeparam name="TGraphTypeHelperImplementation"></typeparam>
-        /// <typeparam name="TGraphSchema"></typeparam>
-        /// <returns></returns>
-        public static void UseXGraphQL<
-            TEntity,
-            TKey,
-            TGraph,
-            TGraphKey,
-            TGraphQuery,
-            TGraphTypeHelperService,
-            TGraphTypeHelperImplementation,
-            TGraphSchema
-        >(
-            IApplicationBuilder source,
-            XRepositoryDescriptor<TEntity, TKey> repositoryDescriptor
-        )
-        where TGraphSchema : Schema
-        where TGraphKey : IGraphType
-        where TEntity : XBaseEntity<TKey>
-        where TGraph : XBaseGraphObjectType<TEntity, TKey>
-        where TGraphTypeHelperService : IXBaseGraphQLTypeHelper<TEntity, TKey>
-        where TGraphQuery : XBaseGraphQLQuery<TEntity, TKey, TGraph, TGraphKey>
-        where TGraphTypeHelperImplementation : XBaseGraphQLTypeHelper<TEntity, TKey>
-        {
-            //
-            // Validate ...
-            var isValid =
-                !source.IsNull() &&
-                !repositoryDescriptor.IsNull() &&
-                !repositoryDescriptor.GraphType.IsNull() &&
-                !repositoryDescriptor.GraphQuery.IsNull() &&
-                !repositoryDescriptor.GraphSchema.IsNull() &&
-                !repositoryDescriptor.GraphTypeKey.IsNull() &&
-                !repositoryDescriptor.GraphTypeHelperService.IsNull() &&
-                !repositoryDescriptor.GraphTypeHelperImplementation.IsNull();
-            if (!isValid)
-            {
-                return;
-            }
-
-            //
-            // Create an Scope for Services Acces ...
-            using (var scope = source.ApplicationServices.CreateScope())
-            {
-                //
-                // Inject GraphQL Type Helper ...
-                var helper = scope.ServiceProvider.GetService<TGraphTypeHelperService>();
-
-                //
-                source.UseGraphQL<TGraphSchema>(helper.GetGraphQLPath());
-                source.UseGraphQLWebSockets<TGraphSchema>();
-            }
-        }
         #endregion
     }
 }

Interfaces/IXBaseDbSeeder.cs

@@ -10,10 +10,24 @@ namespace xDataService.Interfaces
     public interface IXBaseDbSeeder<TEntity, TKey>
     where TEntity : XBaseEntity<TKey>
     {
+        /// <summary>
+        /// Holds Entity Name ...
+        /// </summary>
+        string Entity { get; }
+
+        /// <summary>
+        /// Holds Database Name ...
+        /// </summary>
         string Database { get; }
 
+        /// <summary>
+        /// Repository Service for Data Manipulation ...
+        /// </summary>
         IXBaseRepository<TEntity, TKey> Repository { get; }
         
+        /// <summary>
+        /// DataServiceConfiguration ...
+        /// </summary>
         XDataServiceConfiguration DataServiceConfiguration { get; }
 
         /// <summary>

Interfaces/IXBaseGraphQLQuery.cs

@@ -3,13 +3,7 @@ using xModels.Base;
 
 namespace xDataService.Interfaces
 {
-    public interface IXBaseGraphQLQuery { }
+    public interface IXBaseGraphQLQuery<TEntity, TKey, TGraph, TGraphKey>
-
-    public interface IXBaseGraphQLQuery<TEntity, TKey> : IXBaseGraphQLQuery
-    where TEntity : XBaseEntity<TKey>
-    { }
-
-    public interface IXBaseGraphQLQuery<TEntity, TKey, TGraph, TGraphKey> : IXBaseGraphQLQuery<TEntity, TKey>
     where TEntity : XBaseEntity<TKey>
     where TGraph : IGraphType
     where TGraphKey : IGraphType

Interfaces/IXBaseGraphQLTypeHelper.cs

@@ -2,7 +2,8 @@ using xModels.Base;
 
 namespace xDataService.Interfaces
 {
-    public interface IXBaseGraphQLTypeHelper
+    public interface IXBaseGraphQLTypeHelper<TEntity, TKey>
+    where TEntity : XBaseEntity<TKey>
     {
         string GetInQuerySingleName();
         
@@ -20,8 +21,4 @@ namespace xDataService.Interfaces
 
         string GetGraphQLPath(string baseGraphPath = null);
     }
-
-    public interface IXBaseGraphQLTypeHelper<TEntity, TKey> : IXBaseGraphQLTypeHelper
-        where TEntity : XBaseEntity<TKey>
-    { }
 }

Providers/XBaseDbSeeder.cs

@@ -1,3 +1,4 @@
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
@@ -12,29 +13,48 @@ namespace xDataService.Providers
     public abstract class XBaseDbSeeder<TEntity, TKey> : IXBaseDbSeeder<TEntity, TKey>
     where TEntity : XBaseEntity<TKey>
     {
+        //
+        #region Properties ...
+        /// <summary>
+        /// Holds Entity Name ...
+        /// </summary>
+        public string Entity { get; }
+
+        /// <summary>
+        /// Holds Database Name ...
+        /// </summary>
         public string Database { get; }
 
+        /// <summary>
+        /// Repository Service for Data Manipulation ...
+        /// </summary>
         public IXBaseRepository<TEntity, TKey> Repository { get; }
 
+        /// <summary>
+        /// DataServiceConfiguration ...
+        /// </summary>
         public XDataServiceConfiguration DataServiceConfiguration { get; }
+        #endregion
 
+        //
+        #region Constructor ...
         public XBaseDbSeeder(
+            string entity,
             string database,
             IXBaseRepository<TEntity, TKey> repository,
             XDataServiceConfiguration dataServiceConfiguration
         )
         {
             //
+            this.Entity = entity;
             this.Database = database;
             this.Repository = repository;
             this.DataServiceConfiguration = dataServiceConfiguration;
         }
+        #endregion
 
         public async Task Seed()
         {
-            //
-            var entityName = nameof(TEntity);
-
             //
             // Validate Seed ...
             var isValid =
@@ -45,7 +65,7 @@ namespace xDataService.Providers
                         db.Key == Database &&
                         db.Value.SeedItems
                             .Any(si =>
-                                si.Key == entityName &&
+                                si.Key == Entity &&
                                 si.Value.HasChild()));
             if (!isValid)
             {
@@ -56,7 +76,7 @@ namespace xDataService.Providers
             // Extract Seeding Items ...
             var seedItems = DataServiceConfiguration
                 .Databases[Database]
-                .SeedItems[entityName]
+                .SeedItems[Entity]
                 .ToList();
             foreach (var item in seedItems)
             {
@@ -64,8 +84,9 @@ namespace xDataService.Providers
                 try
                 {
                     //
-                    // Try to convert Item to Entity ...
+                    var entity = item
-                    var entity = ((object)item).FromDynamicObject<TEntity>();
+                        .ToJSON()
+                        .FromJSON<TEntity>();
 
                     //
                     // Check Item Exists or not ...
@@ -100,7 +121,10 @@ namespace xDataService.Providers
                             if (!isExist)
                             {
                                 //
-                                exists = await Repository.AddAsync(entity);
+                                exists = await Repository.AddAsync(
+                                    item: entity,
+                                    saveChanges: true
+                                );
                             }
                             break;
 

xDataService.csproj

@@ -31,7 +31,7 @@
     <!-- <PackageReference Include="xDashboard.xModels" Version="1.0.0" /> -->
   </ItemGroup>
 
-  <!-- Dependencies -->
+  <!-- MongoDB -->
   <ItemGroup>
     <PackageReference Include="MongoDB.Driver" Version="2.13.2" />
     <PackageReference Include="Microsoft.Bcl.AsyncInterfaces" Version="5.0.0" />
@@ -52,6 +52,7 @@
   <ItemGroup>
     <PackageReference Include="System.Reactive" Version="5.0.0" />
     <PackageReference Include="MySql.EntityFrameworkCore" Version="3.1.14" />
+    <PackageReference Include="Oracle.EntityFrameworkCore" Version="3.19.180" />
     <PackageReference Include="Microsoft.EntityFrameworkCore" Version="3.1.14" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="3.1.14">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>