diff --git a/lib/datagrid/drivers/array.rb b/lib/datagrid/drivers/array.rb
index f4672d7..26f3bbf 100644
--- a/lib/datagrid/drivers/array.rb
+++ b/lib/datagrid/drivers/array.rb
@@ -39,15 +39,13 @@ def reverse_order(scope)
 
       def greater_equal(scope, field, value)
         scope.select do |object|
-          compare_value = object.public_send(field)
-          compare_value.respond_to?(:>=) && compare_value >= value
+          object.public_send(field) >= value
         end
       end
 
       def less_equal(scope, field, value)
         scope.select do |object|
-          compare_value = object.public_send(field)
-          compare_value.respond_to?(:<=) && compare_value <= value
+          object.public_send(field) <= value
         end
       end
 
diff --git a/lib/datagrid/filters/base_filter.rb b/lib/datagrid/filters/base_filter.rb
index fcbd746..db468d7 100644
--- a/lib/datagrid/filters/base_filter.rb
+++ b/lib/datagrid/filters/base_filter.rb
@@ -68,7 +68,7 @@ def header
   def default(object)
     default = self.options[:default]
     if default.is_a?(Symbol)
-      object.public_send(default)
+      object.send(default)
     elsif default.respond_to?(:call)
       Datagrid::Utils.apply_args(object, &default)
     else
@@ -173,7 +173,7 @@ def driver
 
   def default_filter(value, scope, grid)
     return nil if dummy?
-    if !driver.has_column?(scope, name) && scope.respond_to?(name)
+    if !driver.has_column?(scope, name) && scope.respond_to?(name, true)
       scope.public_send(name, value)
     else
       default_filter_where(scope, value)
diff --git a/spec/datagrid/core_spec.rb b/spec/datagrid/core_spec.rb
index d943b16..b78cd6f 100644
--- a/spec/datagrid/core_spec.rb
+++ b/spec/datagrid/core_spec.rb
@@ -101,11 +101,11 @@ class TestGrid < ScopeTestReport
       class InspectTest
         include Datagrid
         scope {Entry}
-        filter(:created_at, :date, :range => true)
+        filter(:created_at, :date, range: true)
         column(:name)
       end
 
-      grid = InspectTest.new(:created_at => ['2014-01-01', '2014-08-05'], :descending => true, :order => 'name')
+      grid = InspectTest.new(created_at: ['2014-01-01', '2014-08-05'], descending: true, order: 'name')
       expect(grid.inspect).to eq('#<InspectTest order: :name, descending: true, created_at: [Wed, 01 Jan 2014, Tue, 05 Aug 2014]>')
     end
   end
@@ -154,7 +154,7 @@ class EqualTest
     end
 
     it "has access to attributes" do
-      grid = test_report(:attribute_name => 'value') do
+      grid = test_report(attribute_name: 'value') do
         scope {Entry}
         datagrid_attribute :attribute_name
         dynamic do