Do not pass :include_blank for DateTime inputs neither for PriorityZones when a priority is defined.

lib/simple_form/inputs/base.rb

@@ -26,7 +26,6 @@ module SimpleForm
       end
 
       def input_options
-        options[:include_blank] = true unless skip_include_blank?
         options
       end
 
@@ -58,11 +57,6 @@ module SimpleForm
         reflection ? reflection.name : attribute_name
       end
 
-      # Check if :include_blank must be included by default.
-      def skip_include_blank?
-        options.key?(:prompt) || options.key?(:include_blank)
-      end
-
       # Retrieve options for the given namespace from the options hash
       def html_options_for(namespace, *extra)
         html_options = options[:"#{namespace}_html"] || {}

lib/simple_form/inputs/collection_input.rb

@@ -19,10 +19,18 @@ module SimpleForm
                       options[:label_method], input_options, input_html_options)
       end
 
+      def input_options
+        options = super
+        options[:include_blank] = true unless skip_include_blank?
+        options
+      end
+
     protected
 
+      # Check if :include_blank must be included by default.
       def skip_include_blank?
-        super || options[:input_html].try(:[], :multiple)
+        (options.keys & [:prompt, :include_blank, :default, :selected]).any? ||
+          options[:input_html].try(:[], :multiple)
       end
 
       # Detect the right method to find the label and value for a collection.

lib/simple_form/inputs/priority_input.rb

@@ -1,6 +1,6 @@
 module SimpleForm
   module Inputs
-    class PriorityInput < Base
+    class PriorityInput < CollectionInput
       def input
         @builder.send(:"#{input_type}_select", attribute_name, input_priority,
                       input_options, input_html_options)
@@ -9,6 +9,12 @@ module SimpleForm
       def input_priority
         options[:priority] || SimpleForm.send(:"#{input_type}_priority")
       end
+
+    protected
+
+      def skip_include_blank?
+        super || input_priority.present?
+      end
     end
   end
 end

test/inputs_test.rb

@@ -116,15 +116,17 @@ class InputTest < ActionView::TestCase
     assert_select 'select option[value=Brasilia]', '(GMT-03:00) Brasilia'
     assert_no_select 'select option[value=][disabled=disabled]'
   end
-  
+
   test 'input should generate a time zone select field with default' do
     with_input_for @user, :time_zone, :time_zone, :default => 'Brasilia'
     assert_select 'select option[value=Brasilia][selected=selected]'
+    assert_no_select 'select option[value=]'
   end
-  
+
   test 'input should generate a time zone select using options priority' do
     with_input_for @user, :time_zone, :time_zone, :priority => /Brasilia/
     assert_select 'select option[value=][disabled=disabled]'
+    assert_no_select 'select option[value=]', /^$/
   end
 
   # DateTime input
@@ -162,7 +164,12 @@ class InputTest < ActionView::TestCase
     assert_select 'select.date option', 'mês'
     assert_select 'select.date option', 'dia'
   end
-  
+
+  test 'input should be able to pass :default to date select' do
+    with_input_for @user, :born_at, :date, :default => Date.today
+    assert_select "select.date option[value=#{Date.today.year}][selected=selected]"
+  end
+
   test 'input should generate a time select for time attributes' do
     with_input_for @user, :delivery_time, :time
     assert_select 'input[type=hidden]#user_delivery_time_1i'