first raw implementation of the form

app/controllers/pages_controller.rb

@@ -0,0 +1,4 @@
+class PagesController < ApplicationController
+  def thanks
+  end
+end

app/controllers/supporters_controller.rb

@@ -2,4 +2,20 @@ class SupportersController < ApplicationController
   def new
     @supporter = Supporter.new
   end
+
+  def create
+    @supporter = Supporter.new supporter_form_params
+    if @supporter.save
+      redirect_to thanks_path
+    else
+      flash.now[:danger] = t 'shared.actions.failed'
+      render :new
+    end
+  end
+
+  private
+
+  def supporter_form_params
+    params.require(:supporter).permit(:first_name, :last_name, :street, :zip, :email, :support, :age_category)
+  end
 end

app/helpers/application_helper.rb

@@ -1,2 +1,6 @@
 module ApplicationHelper
+  def title(page_title)
+    content_for :title, page_title.to_s
+    page_title
+  end
 end

app/views/layouts/application.html.slim

@@ -1,6 +1,6 @@
 html
   head
-    title Ch420
+    title #CH420 - #{content_for(:title)}
     = stylesheet_link_tag    'application', media: 'all', 'data-turbolinks-track' => true
     = javascript_include_tag 'application', 'data-turbolinks-track' => true
     = csrf_meta_tags

app/views/pages/thanks.de.slim

@@ -0,0 +1,2 @@
+.lead
+  h1 = title t('.title')

app/views/supporters/_form.slim

@@ -0,0 +1,10 @@
+h1 = title t('.title')
+= simple_form_for @supporter do |f|
+  = f.input :first_name
+  = f.input :last_name
+  = f.input :street
+  = f.input :zip
+  = f.input :email
+  = f.input :support, as: :radio_buttons, collection: t('support_type'), label_method: :last, value_method: :first
+  = f.input :age_category, as: :radio_buttons, collection: t('age_category'), label_method: :last, value_method: :first
+  = f.submit value: t('.submit'), class: 'btn btn-success'

app/views/supporters/new.slim

@@ -1 +1,2 @@
-h1 Test
+= render 'form'
+