Les statistiques fonctionnent à la fois pour mysql et sqlite, en utilisant des requêtes spécifiques pour extraction des mois et année

app/controllers/regions_controller.rb

@@ -7,17 +7,26 @@ class RegionsController < InheritedResources::Base
     @city_events = Event.group(:city).having('count(city) > 3')
       .order('count(city) desc').count :city
 
-    # Used in sqlite
-    # .group('strftime("%Y", start_time)')
-    @year_events = Event
-      .group('extract(year from start_time)').count
+    @year_events = Event.group(year_grouping).count
 
-    # Used in sqlite
-    # .group('strftime("%Y", start_time)')
-    # .group('strftime("%m", start_time)')
-    @month_events = Event
-      .group('extract(year from start_time)')
-      .group('extract(month from start_time)')
-      .count
+    @month_events = Event.group(year_grouping, month_grouping).count
+  end
+
+  private
+
+  def year_grouping
+    if %w(Mysql2 MySQL PostgreSQL).include? Event.connection.adapter_name
+      'extract(year from start_time)'
+    elsif Event.connection.adapter_name == 'SQLite'
+      'strftime("%Y", start_time)'
+    end
+  end
+
+  def month_grouping
+    if %w(Mysql2 MySQL PostgreSQL).include? Event.connection.adapter_name
+      'extract(month from start_time)'
+    elsif Event.connection.adapter_name == 'SQLite'
+      'strftime("%m", start_time)'
+    end
   end
 end

app/views/regions/stats.html.haml

@@ -25,8 +25,9 @@
         %th.month= I18n.t('date.month_names')[m]
         - @year_events.each do |year|
           %td.quantity
-            - line = @month_events.find { |line| line[0][0] == year[0] && line[0][1] == m }
-            = number_with_delimiter line[1] if line
+            - line = @month_events.find { |line| line[0][0] == year[0] && line[0][1].try(:to_i) == m }
+            = link_to root_url(start_date: "#{year[0]}-#{m}-01") do
+              = number_with_delimiter line[1] if line
         %td.sparkline/
 
   %tfoot

config/database.yml

@@ -1,12 +1,8 @@
-development_old:
+development:
   adapter: sqlite3
   pool: 5
   timeout: 5000
   database: db/development.sqlite3
-development:
-  adapter: mysql2
-  database: adl_fr
-  username: manu
 
 # Warning: The database defined as "test" will be erased and
 # re-generated from your development database when you run "rake".