Use comma as a default fraction separator

app/helpers/form_helper.rb

@@ -7,7 +7,7 @@ module FormHelper
   end
 
   def money_field(object_name, method, options = {})
-    options[:pattern] = '^[0-9.]+$' unless options[:pattern]
+    options[:pattern] = '^[0-9.,]+$' unless options[:pattern]
     options[:maxlength] = 255 unless options[:maxlength]
 
     text_field(object_name, method, options)

config/locales/en.yml

@@ -934,3 +934,12 @@ en:
   cant_match_version: 'Impossible match version with request'
   user_not_authenticated: "user not authenticated"
   actions: Actions
+
+  number:
+    currency:
+      format:
+        format: "%n %u"
+        separator: ","
+        delimiter: " "
+        precision: 2
+        unit: €

spec/views/shared_examples/money_form_field.rb

@@ -6,6 +6,6 @@ RSpec.shared_examples 'money form field' do
 
   it 'has money pattern' do
     render
-    expect(field[:pattern]).to eq('^[0-9.]+$')
+    expect(field[:pattern]).to eq('^[0-9.,]+$')
   end
 end