Updated the SqlMembershipSources attribute serialization to handle null values.

Author: Angel Mendez

Service/GroupMembershipManagement/Repositories.EntityFramework.Contexts/GMMContext.cs

@@ -56,12 +56,15 @@ protected override void OnModelCreating(ModelBuilder modelBuilder)
 
                 source.Property(e => e.Attributes)
                     .HasConversion(
-                        v => JsonSerializer.Serialize(v, (JsonSerializerOptions?)null),
-                        v => JsonSerializer.Deserialize<List<SqlMembershipAttribute>>(v, (JsonSerializerOptions?)null),
+                        v => v == null ? null : JsonSerializer.Serialize(v, (JsonSerializerOptions?)null),
+                        v => string.IsNullOrEmpty(v) ? null : JsonSerializer.Deserialize<List<SqlMembershipAttribute>>(v, (JsonSerializerOptions?)null),
                         new ValueComparer<List<SqlMembershipAttribute>>(
-                            (c1, c2) => JsonSerializer.Serialize(c1, (JsonSerializerOptions?)null) == JsonSerializer.Serialize(c2, (JsonSerializerOptions?)null),
-                            c => c == null ? 0 : JsonSerializer.Serialize(c, (JsonSerializerOptions?)null).GetHashCode(),
-                            c => JsonSerializer.Deserialize<List<SqlMembershipAttribute>>(JsonSerializer.Serialize(c, (JsonSerializerOptions?)null), (JsonSerializerOptions?)null)));
+                        (c1, c2) =>
+                            (c1 == null && c2 == null) ||
+                            (c1 != null && c2 != null && JsonSerializer.Serialize(c1, (JsonSerializerOptions?)null) == JsonSerializer.Serialize(c2, (JsonSerializerOptions?)null)),
+                        c => c == null ? 0 : JsonSerializer.Serialize(c, (JsonSerializerOptions?)null).GetHashCode(),
+                        c => c == null ? null : JsonSerializer.Deserialize<List<SqlMembershipAttribute>>(JsonSerializer.Serialize(c, (JsonSerializerOptions?)null), (JsonSerializerOptions?)null))
+                    );
 
                 source.HasData(new Entities.SqlMembershipSource
                 {