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

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 = ((object)item).FromDynamicObject<TEntity>();
+                    var entity = item
+                        .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;