FIX: if an enum is Fixnum do not allow strings to live in it

lib/site_setting_extension.rb

@@ -291,6 +291,7 @@ module SiteSettingExtension
     end
 
     if type == types[:enum]
+      val = val.to_i if Fixnum === defaults[name.to_sym]
       if enum_class(name)
         raise Discourse::InvalidParameters.new(:value) unless enum_class(name).valid_value?(val)
       else

spec/components/site_setting_extension_spec.rb

@@ -224,6 +224,35 @@ describe SiteSettingExtension do
     end
   end
 
+  describe 'int enum' do
+    class TestIntEnumClass
+      def self.valid_value?(v)
+        true
+      end
+      def self.values
+        [1,2,3]
+      end
+      def self.translate_names?
+        true
+      end
+    end
+
+    let :test_enum_class do
+      TestEnumClass
+    end
+
+    before do
+      settings.setting(:test_enum, 1, enum: TestEnumClass)
+      settings.refresh!
+    end
+
+    it 'should coerce correctly' do
+      settings.test_enum = "2"
+      expect(settings.test_enum).to eq(2)
+    end
+
+  end
+
   describe 'enum setting' do
 
     class TestEnumClass