A lot :)

app/models/check.rb

@@ -1,11 +1,67 @@
+# frozen_string_literal: true
+
 class Check < ApplicationRecord
   include RichTextTargetBlank
 
-  enum :level, %i[A AA AAA]
+  belongs_to :principle
 
-  has_rich_text :success_criterion_html
+  has_and_belongs_to_many :links
+  has_and_belongs_to_many :standards
 
-  scope :search, lambda { |term|
-                   joins("INNER JOIN action_text_rich_texts ON action_text_rich_texts.record_id = checks.id AND record_type = 'Check'").where('checks.name LIKE :term OR action_text_rich_texts.body_text LIKE :term', term: "%#{term}%")
-                 }
+  accepts_nested_attributes_for :links, allow_destroy: true
+
+  enum :conformity_level, %i[A AA AAA]
+  enum :priority, %i[highest high normal low]
+
+  has_rich_text :conformity_notice_de
+  has_rich_text :conformity_notice_en
+  has_rich_text :quick_criterion_de
+  has_rich_text :quick_criterion_en
+  has_rich_text :quick_fail_de
+  has_rich_text :quick_fail_en
+  has_rich_text :quick_fix_de
+  has_rich_text :quick_fix_en
+
+  has_rich_text :criterion_de
+  has_rich_text :criterion_en
+  has_rich_text :criterion_details_de
+  has_rich_text :criterion_details_en
+  has_rich_text :example_de
+  has_rich_text :example_en
+  has_rich_text :exemption_details_de
+  has_rich_text :exemption_details_en
+  has_rich_text :standard_text_de
+  has_rich_text :standard_text_en
+
+  has_rich_text :test_instructions
+
+  has_rich_text :powerpoint_text_de
+  has_rich_text :powerpoint_text_en
+
+  has_rich_text :comment
+
+  translates_attributes :name,
+                        :conformity_notice,
+                        :quick_criterion,
+                        :quick_fail,
+                        :quick_fix,
+                        :criterion,
+                        :criterion_details,
+                        :example,
+                        :exemption_details,
+                        :standard_text,
+                        :powerpoint_text
+
+  scope(:search, lambda do |term|
+    # TODO: Search only fields for current locale.
+    joins("INNER JOIN action_text_rich_texts ON action_text_rich_texts.record_id = checks.id AND record_type = 'Check'").where("checks.name_de LIKE :term OR checks.name_de LIKE :term OR action_text_rich_texts.body LIKE :term", term: "%#{term}%").distinct
+  end)
+
+  def display_target_disabilities
+    %i[visual auditory physical cognitive].select { |d| send(:"#{d}?") }.map { |d| I18n.t("disability.#{d}") }.map(&:first).join(", ")
+  end
+
+  def display_applicabilities
+    %i[applicable_to_app applicable_to_web].select { |a| send(:"#{a}?") }.map { |a| I18n.t("applicability.#{a}") }.map(&:first).join(", ")
+  end
 end