I102 valkyrie validations

app/change_sets/generic_work_resource_change_set.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+require 'title_validator'
+
+class GenericWorkResourceChangeSet < Hyrax::ChangeSet
+  property :title, multiple: true, required: true
+
+  # validating change_sets => https://github.com/samvera/valkyrie/wiki/Validating-change-sets
+  validates :title, presence: true
+  validates_with TitleValidator
+end

app/change_sets/image_resource_change_set.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+require 'title_validator'
+
+class ImageResourceChangeSet < Hyrax::ChangeSet
+  property :title, multiple: true, required: true
+
+  # validating change_sets => https://github.com/samvera/valkyrie/wiki/Validating-change-sets
+  validates :title, presence: true
+  validates_with TitleValidator
+end

app/validators/title_validator.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+class TitleValidator < ActiveModel::Validator
+  # ensure the property exists and is in the controlled vocabulary
+  def validate(record)
+    record.title.present?
+
+    record.errors.add :title, 'Your work must have a title.'
+  end
+end