Replace JsonConstructor by MagicConstructor

Magic.IndexedDb/Exceptions/MagicConstructorException.cs

@@ -0,0 +1,3 @@
+namespace Magic.IndexedDb.Exceptions;
+
+public class MagicConstructorException(string message) : Exception(message);

Magic.IndexedDb/Helpers/PropertyMappingCache.cs

@@ -5,6 +5,7 @@
 using System.Collections.Concurrent;
 using System.Reflection;
 using System.Text.Json.Serialization;
+using Magic.IndexedDb.Exceptions;
 
 namespace Magic.IndexedDb.Helpers;
 
@@ -37,12 +38,20 @@ public SearchPropEntry(Type type, Dictionary<string, MagicPropertyEntry> _proper
             EnforcePascalCase = false;
         }
 
-        // 🔥 Pick the best constructor: Prefer JsonConstructor, then fall back to a parameterized one, else fallback to parameterless
-        var jsonConstructor = constructors.FirstOrDefault(c => c.GetCustomAttribute<JsonConstructorAttribute>() != null);
-        if (jsonConstructor == null)
+        // 🔥 Pick the best constructor: Prefer MagicConstructor, then fall back to a parameterized one, else fallback to parameterless
+        try
         {
-            Constructor = constructors.OrderByDescending(c => c.GetParameters().Length).FirstOrDefault();
+            var magicConstructor = constructors.SingleOrDefault(c => c.GetCustomAttribute<MagicConstructorAttribute>() != null);
+            if (magicConstructor == null)
+            {
+                Constructor = constructors.OrderByDescending(c => c.GetParameters().Length).FirstOrDefault();
+            }
         }
+
+        catch (InvalidOperationException){
+            throw new MagicConstructorException("Only one magic constructor is allowed");
+        }
+
         HasConstructorParameters = Constructor != null && Constructor.GetParameters().Length > 0;
 
         // 🔥 Cache constructor parameter mappings

Magic.IndexedDb/SchemaAnnotations/MagicConstructorAttribute.cs

@@ -0,0 +1,6 @@
+namespace Magic.IndexedDb.SchemaAnnotations;
+
+/// <summary>
+/// Sets the preferred constructor for serialization for MagicDB
+/// </summary>
+public class MagicConstructorAttribute : Attribute;

TestBase/Models/Person.cs

@@ -14,7 +14,7 @@ public class Nested
 
 public class Person : MagicTableTool<Person>, IMagicTable<DbSets>
 {
-    [JsonConstructor]
+    [MagicConstructor]
     public Person()
     {
         DoNotMapTest2 = "Test";