Convert Boolean type to Mongoid::Boolean

Internally we need to use the Mongoid::Boolean type, and not the Boolean type, so we could convert that internally

lib/mongoid/fields/standard.rb

@@ -165,7 +165,14 @@ def pre_processed?
       #
       # @since 2.1.0
       def type
-        @type ||= options[:type] || Object
+        @type ||=
+          begin
+            if "Boolean" == options[:type].to_s
+              Mongoid::Boolean
+            else
+              options[:type] || Object
+            end
+          end
       end
 
       private

spec/mongoid/fields/standard_spec.rb

@@ -2,6 +2,37 @@
 
 describe Mongoid::Fields::Standard do
 
+  describe "Boolean" do
+
+    context "when field type is Boolean" do
+
+      let(:field) do
+        described_class.new(
+          :test,
+          type: Boolean
+          )
+      end
+
+      it "returns as Mongoid::Boolean" do
+        expect(field.type).to eq(Mongoid::Boolean)
+      end
+    end
+
+    context "when field type is Mongoid::Boolean" do
+
+      let(:field) do
+        described_class.new(
+          :test,
+          type: Mongoid::Boolean
+          )
+      end
+
+      it "returns as Mongoid::Boolean" do
+        expect(field.type).to eq(Mongoid::Boolean)
+      end
+    end
+  end
+
   describe "#lazy?" do
 
     let(:field) do