add option to disable cents field

app/models/formbuilder/response_field_price.rb

@@ -9,23 +9,34 @@ class ResponseFieldPrice < ResponseField
     }
 
     def render_input(value, opts = {})
-      """
+      value ||= {}
+
+      str = """
         <div class='input-line'>
           <span class='above-line'>$</span>
 
           <span class='dollars'>
             <input type='text' name='response_fields[#{self[:id]}][dollars]' id='response_fields_#{self[:id]}' value='#{value['dollars']}' />
             <label>Dollars</label>
           </span>
+      """
 
+      unless self.field_options['disable_cents']
+        str += """
           <span class='above-line'>.</span>
 
           <span class='cents'>
             <input type='text' name='response_fields[#{self[:id]}][cents]' value='#{value['cents']}' maxlength='2' />
             <label>Cents</label>
           </span>
+        """
+      end
+
+      str += """
         </div>
       """
+
+      str
     end
 
     def render_entry(value, opts = {})

spec/lib/formbuilder/entry_validator_spec.rb

@@ -180,7 +180,9 @@
       entry.should be_valid
       entry.save_response({ 'cents' => '1a' }, field)
       entry.should_not be_valid
-      entry.save_response({ 'cents' => '1' }, field)
+      entry.save_response({ 'cents' => '1', 'dollars' => '' }, field)
+      entry.should be_valid
+      entry.save_response({ 'dollars' => '1', 'cents' => '' }, field)
       entry.should be_valid
       entry.save_response({ 'dollars' => '3a', 'cents' => '1' }, field)
       entry.should_not be_valid

spec/models/formbuilder/response_field_price_spec.rb

@@ -0,0 +1,30 @@
+require 'spec_helper'
+
+describe Formbuilder::ResponseFieldPrice do
+
+  let!(:form) { Formbuilder::Form.create }
+  let!(:response_field) { Formbuilder::ResponseFieldPrice.create(form: form) }
+  let!(:entry) { Entry.create(form: form) }
+
+  subject { response_field }
+  subject(:rf) { response_field }
+
+  describe '#render_input' do
+    it 'renders properly' do
+      rendered_html = rf.render_input(nil)
+      expect(rendered_html).to match 'Dollars'
+      expect(rendered_html).to match 'Cents'
+    end
+
+    context 'with cents field disabled' do
+      before { rf.update_attributes(field_options: { 'disable_cents' => true } )}
+
+      it 'does not render the cents field' do
+        rendered_html = rf.render_input(nil)
+        expect(rendered_html).to match 'Dollars'
+        expect(rendered_html).to_not match 'Cents'
+      end
+    end
+  end
+
+end