Update the DatabaseTimeStamp sample to reflect proper saving of Knowledge table (both in Server and Mobile). DatabaseInstanceId field is now a standard field in the table (not the primary key) to avoid letter-casing problems during sync.

Author: aldycool

Samples/DatabaseTimeStamp/MobileSample/Models/Knowledge.cs

@@ -7,6 +7,8 @@ namespace MobileSample.Models
     public class Knowledge : Realms.RealmObject
     {
         [Realms.PrimaryKey()]
+        public string Id { get; set; } = Guid.NewGuid().ToString();
+
         public string DatabaseInstanceId { get; set; }
         public bool IsLocal { get; set; }
         public long MaxTimeStamp { get; set; }

Samples/DatabaseTimeStamp/WebSample/Models/CustomSyncEngine.cs

@@ -34,24 +34,24 @@ public override List<KnowledgeInfo> GetAllKnowledgeInfos(string synchronizationI
         {
             return databaseContext.Knowledges.Where(w => w.SynchronizationID == synchronizationId).Select(s => new KnowledgeInfo()
             {
-                DatabaseInstanceId = s.DatabaseInstanceId.ToString(),
+                DatabaseInstanceId = s.DatabaseInstanceId,
                 IsLocal = s.IsLocal,
                 MaxTimeStamp = s.MaxTimeStamp
             }).ToList();
         }
 
         public override void CreateOrUpdateKnowledgeInfo(KnowledgeInfo knowledgeInfo, string synchronizationId, Dictionary<string, object> customInfo)
         {
-            Guid id = new Guid(knowledgeInfo.DatabaseInstanceId);
-            Knowledge knowledge = databaseContext.Knowledges.Where(w => w.SynchronizationID == synchronizationId && w.DatabaseInstanceId == id).FirstOrDefault();
+            Knowledge knowledge = databaseContext.Knowledges.Where(w => w.SynchronizationID == synchronizationId && w.DatabaseInstanceId == knowledgeInfo.DatabaseInstanceId).FirstOrDefault();
             if (knowledge == null)
             {
                 knowledge = new Knowledge();
-                knowledge.DatabaseInstanceId = id;
+                knowledge.ID = Guid.NewGuid();
                 knowledge.SynchronizationID = synchronizationId;
+                knowledge.DatabaseInstanceId = knowledgeInfo.DatabaseInstanceId;
                 databaseContext.Add(knowledge);
                 databaseContext.SaveChanges();
-                knowledge = databaseContext.Knowledges.Where(w => w.SynchronizationID == synchronizationId && w.DatabaseInstanceId == id).First();
+                knowledge = databaseContext.Knowledges.Where(w => w.SynchronizationID == synchronizationId && w.DatabaseInstanceId == knowledgeInfo.DatabaseInstanceId).First();
             }
             knowledge.IsLocal = knowledgeInfo.IsLocal;
             knowledge.MaxTimeStamp = knowledgeInfo.MaxTimeStamp;

Samples/DatabaseTimeStamp/WebSample/Models/Knowledge.cs

@@ -12,10 +12,12 @@ public class Knowledge
     {
         [Key]
         [DatabaseGenerated(DatabaseGeneratedOption.None)]
-        public Guid DatabaseInstanceId { get; set; }
+        public Guid ID { get; set; }
 
         public string SynchronizationID { get; set; }
 
+        public string DatabaseInstanceId { get; set; }
+
         public bool IsLocal { get; set; }
 
         public long MaxTimeStamp { get; set; }