Skip enum type if it does not have a special attribute "EnumLookupAttribute".

Also added a new setting to enable this feature. EnumLookupOptions.Default.UseEnumsWithAttirbuteOnly()

Author: cioxideru

src/SpatialFocus.EntityFrameworkCore.Extensions/EnumLockupAttribute.cs

@@ -0,0 +1,10 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace SpatialFocus.EntityFrameworkCore.Extensions
+{
+	public class EnumLookupAttribute : Attribute
+	{
+	}
+}

src/SpatialFocus.EntityFrameworkCore.Extensions/EnumLookupExtension.cs

@@ -26,6 +26,11 @@ public static void ConfigureEnumLookup(this ModelBuilder modelBuilder, EnumLooku
 					continue;
 				}
 
+				if (enumOptions.useEnumsWithAttirbutesOnly && !propertyType.GetCustomAttributes(true).Contains(new EnumLookupAttribute()))
+				{
+					continue;
+				}
+
 				IMutableEntityType entityType = property.DeclaringEntityType;
 
 				Type concreteType = enumOptions.UseNumberLookup

src/SpatialFocus.EntityFrameworkCore.Extensions/EnumLookupOptions.cs

@@ -21,6 +21,7 @@ public static EnumLookupOptions Default
 				EnumLookupOptions enumOptions = new EnumLookupOptions();
 				enumOptions.SetNamingScheme(NamingScheme.SnakeCase);
 				enumOptions.UseNumberLookup = true;
+				enumOptions.useEnumsWithAttirbutesOnly = false;
 
 				return enumOptions;
 			}
@@ -29,6 +30,7 @@ public static EnumLookupOptions Default
 		internal Func<string, string> NamingFunction => name => this.postProcessingTableNamingFunction(this.namingFunction(name));
 
 		internal bool UseNumberLookup { get; private set; }
+		internal bool useEnumsWithAttirbutesOnly { get; private set; }
 
 		public EnumLookupOptions Pluralize()
 		{
@@ -58,6 +60,11 @@ public EnumLookupOptions UseNumberAsIdentifier()
 			return this;
 		}
 
+		public EnumLookupOptions UseEnumsWithAttirbuteOnly(){
+			useEnumsWithAttirbutesOnly = true;
+			return this;
+		}
+
 		public EnumLookupOptions UseStringAsIdentifier()
 		{
 			UseNumberLookup = false;