[#2258] Let dynamic type validate the type de champ

app/models/type_de_champ.rb

@@ -59,6 +59,17 @@ class TypeDeChamp < ApplicationRecord
   before_validation :check_mandatory
   before_save :remove_piece_justificative_template, if: -> { type_champ_changed? }
 
+  def valid?(context = nil)
+    super
+    if dynamic_type.present?
+      dynamic_type.valid?
+      errors.merge!(dynamic_type.errors)
+    end
+    errors.empty?
+  end
+
+  alias_method :validate, :valid?
+
   def set_dynamic_type
     @dynamic_type = type_champ.present? ? self.class.type_champ_to_class_name(type_champ).constantize.new(self) : nil
   end

app/models/types_de_champ/type_de_champ_base.rb

@@ -1,4 +1,6 @@
 class TypesDeChamp::TypeDeChampBase
+  include ActiveModel::Validations
+
   def initialize(type_de_champ)
     @type_de_champ = type_de_champ
   end