3 files changed, 27 insertions, 1 deletions
diff --git a/app/models/chouette/time_table.rb b/app/models/chouette/time_table.rb
index 8113457ec..7b69aefb6 100644
--- a/app/models/chouette/time_table.rb
+++ b/app/models/chouette/time_table.rb
@@ -47,6 +47,9 @@ module Chouette
       end
     end
 
+    has_checksum_children TimeTableDate
+    has_checksum_children TimeTablePeriod
+
     def self.object_id_key
       "Timetable"
     end
diff --git a/app/models/chouette/vehicle_journey.rb b/app/models/chouette/vehicle_journey.rb
index 6146d5be8..1971061a2 100644
--- a/app/models/chouette/vehicle_journey.rb
+++ b/app/models/chouette/vehicle_journey.rb
@@ -108,6 +108,8 @@ module Chouette
       end
     end
 
+    has_checksum_children VehicleJourneyAtStop
+
     def set_default_values
       if number.nil?
         self.number = 0
diff --git a/app/models/concerns/checksum_support.rb b/app/models/concerns/checksum_support.rb
index ff73c87a3..a76995b0f 100644
--- a/app/models/concerns/checksum_support.rb
+++ b/app/models/concerns/checksum_support.rb
@@ -3,9 +3,21 @@ module ChecksumSupport
   SEPARATOR = '|'
   VALUE_FOR_NIL_ATTRIBUTE = '-'
 
-  included do
+  included do |into|
     before_save :set_current_checksum_source, :update_checksum
     Referential.register_model_with_checksum self
+    into.extend ClassMethods
+  end
+
+  module ClassMethods
+    def has_checksum_children klass, opts={}
+      parent_class = self
+      relation = opts[:relation] || self.model_name.singular
+      klass.after_save do
+        parent = self.send(relation)
+        parent&.update_checksum_without_callbacks!
+      end
+    end
   end
 
   def checksum_attributes
@@ -34,4 +46,13 @@ module ChecksumSupport
       update checksum: Digest::SHA256.new.hexdigest(checksum_source)
     end
   end
+
+  def update_checksum_without_callbacks!
+    set_current_checksum_source
+    _checksum = Digest::SHA256.new.hexdigest(checksum_source)
+    if _checksum != self.checksum
+      self.checksum = _checksum
+      self.class.where(id: self.id).update_all(checksum: _checksum) unless self.new_record?
+    end
+  end
 end