La gestion des datetime_local redevient simple et logiqu, avant ajout de shims javascript

Gemfile.lock

 GIT
   remote: git://github.com/gregbell/active_admin.git
-  revision: 168d72e7f5d705cd25373775db2c9efd910b7a95
+  revision: 9cfc45330e5ad31977b3ac7b2ccc1f8d6146c73f
   specs:
     activeadmin (1.0.0.pre)
       arbre (~> 1.0)
@@ -149,7 +149,7 @@ GEM
     inherited_resources (1.4.1)
       has_scope (~> 0.6.0.rc)
       responders (~> 1.0.0.rc)
-    jbuilder (2.1.2)
+    jbuilder (2.1.3)
       activesupport (>= 3.0.0, < 5)
       multi_json (~> 1.2)
     jquery-rails (3.1.1)
@@ -268,7 +268,7 @@ GEM
     thread_safe (0.3.4)
     tilt (1.4.1)
     timers (1.1.0)
-    tinymce-rails (4.1.0)
+    tinymce-rails (4.1.2)
       railties (>= 3.1.1)
     tinymce-rails-langs (4.20140129)
       tinymce-rails (~> 4.0)

app/controllers/events_controller.rb

@@ -39,6 +39,8 @@ class EventsController < ApplicationController
   # GET /users/new
   def new
     @event = Event.new
+    @event.start_time ||= Time.now.change(min: 0) + 1.day + 1.hour
+    @event.end_time ||= Time.now.change(min: 0) + 1.day + 2.hour
   end
 
   # POST /events

app/views/events/_form.html.haml

@@ -24,14 +24,10 @@
     = f.text_field :title, required: true, size: 70
   .field
     = f.label :start_time
-    = f.datetime_local_field :start_time, required: true, size: 14,
-      value: l(@event.start_time || Time.now + 1.day + 1.hour - Time.now.min.minutes, format: :manual),
-      placeholder: t('time.formats.manual')
+    = f.datetime_local_field :start_time, required: true
   .field
     = f.label :end_time
-    = f.datetime_local_field :end_time, required: true, size: 14,
-      value: l(@event.end_time || Time.now + 1.day + 2.hour - Time.now.min.minutes, format: :manual),
-      placeholder: t('time.formats.manual')
+    = f.datetime_local_field :end_time, required: true
   .field
     .helper
       :markdown

config/locales/fr.yml

@@ -91,7 +91,6 @@ fr:
     formats:
       at: "%A %d %B %Y à %Hh%M"
       hours: "%Hh%M"
-      manual: "%d/%m/%Y %H:%M"
 
   # Traductions des écrans
   layouts: