create regenerate action

Author: AstiV

app/controllers/admin/groups_controller.rb

@@ -7,8 +7,28 @@ def index
     @event_groups = @event.event_groups
   end
 
+  # An action to regenerate 
+  # -> a controller method
+  # -> button (to call the action)
+  # -> a route
+  # -> isolate generate behaviour in its own method
+
   def generate
+    fill_groups
+    @event_groups = @event.event_groups
+    redirect_to admin_event_groups_path(@event), notice: "Groups successfully generated"
+  end
 
+  def regenerate
+    @event_groups = @event.event_groups
+    @event_groups.destroy_all
+    fill_groups
+    redirect_to admin_event_groups_path(@event), notice: "Groups successfully regenerated"
+  end
+
+  private
+
+  def fill_groups
     # create a group for each pair of coaches
     @coaches = @event.coach_applications.approved.to_a
     @coaches.each_slice(2).with_index do |group, index|
@@ -26,14 +46,8 @@ def generate
         event_group.applications << attendee_group unless attendee_group.empty?
       end
     end
-
-    @event_groups = @event.event_groups
-
-    redirect_to admin_event_groups_path(@event), notice: "Groups successfully generated"
   end
 
-  private
-
   def find_event
     @event = Event.find(params[:event_id])
   end

app/views/admin/groups/index.html.erb

@@ -1,5 +1,6 @@
 <% if @event.has_groups? %>
 
+  <%= button_to "Regenerate groups", regenerate_admin_event_groups_path(@event), method: :post %>
   <% @event_groups.each do |event_group| %>
     <h2><%= event_group.name %></h2>
     <table>

config/routes.rb

@@ -49,6 +49,7 @@
       resources :groups, only: [:index] do
         collection do
           post :generate
+          post :regenerate
         end
       end
       put :complete