Item.validates_length_of ..., {minimum: } to minlength attribute

Author: amatsuda

lib/html5_validators/action_view/form_helpers.rb

@@ -24,6 +24,7 @@ module LengthValidator
       def render
         if object.class.ancestors.include?(ActiveModel::Validations) && (object.auto_html5_validation != false) && (object.class.auto_html5_validation != false)
           @options["maxlength"] ||= @options[:maxlength] || object.class.attribute_maxlength(@method_name)
+          @options["minlength"] ||= @options[:minlength] || object.class.attribute_minlength(@method_name)
         end
         super
       end

lib/html5_validators/active_model/helper_methods.rb

@@ -13,6 +13,12 @@ def attribute_maxlength(attribute)
         }.map {|v| v.options.slice(:maximum, :is)}.map(&:values).flatten.max
       end
 
+      def attribute_minlength(attribute)
+        self.validators.grep(LengthValidator).select {|v|
+          v.attributes.include?(attribute.to_sym) && (v.options.keys & [:minimum, :is]).any? && (v.options.keys & [:if, :unless, :allow_nil, :allow_blank, :tokenizer]).empty?
+        }.map {|v| v.options.slice(:minimum, :is)}.map(&:values).flatten.min
+      end
+
       def attribute_max(attribute)
         self.validators.grep(NumericalityValidator).select {|v|
           v.attributes.include?(attribute.to_sym) && (v.options.keys & [:less_than, :less_than_or_equal_to]).any? && (v.options.keys & [:if, :unless, :allow_nil, :allow_blank]).empty?

spec/features/validation_spec.rb

@@ -86,6 +86,20 @@
       find('textarea#person_bio')[:maxlength].should == '100'
     end
   end
+
+  context 'with minlength validation' do
+    background do
+      Person.validates_length_of :name, {:minimum => 3}
+      Person.validates_length_of :bio, {:minimum => 10}
+    end
+
+    scenario 'new form' do
+      visit '/people/new'
+
+      find('input#person_name')[:minlength].should == '3'
+      find('textarea#person_bio')[:minlength].should == '10'
+    end
+  end
 end
 
 feature 'item#new' do
@@ -174,4 +188,18 @@
       find('textarea#item_description')[:maxlength].should == '100'
     end
   end
+
+  context 'with minlength validation' do
+    background do
+      Item.validates_length_of :name, {:minimum => 3}
+      Item.validates_length_of :description, {:minimum => 10}
+    end
+
+    scenario 'new form' do
+      visit '/items/new'
+
+      find('input#item_name')[:minlength].should == '3'
+      find('textarea#item_description')[:minlength].should == '10'
+    end
+  end
 end