ISSUE-7795: Internationalize name length validation and add frontend maxlength

Author: Naragod

app/models/exam_template.rb

@@ -9,7 +9,7 @@ class ExamTemplate < ApplicationRecord
   validates :filename, :num_pages, :name, presence: true
   validates :name,
             uniqueness: { scope: :assignment },
-            length: { maximum: 20, message: 'must be at most 20 characters' }
+            length: { maximum: 20 }
   validates :num_pages, numericality: { greater_than_or_equal_to: 0,
                                         only_integer: true }
 

app/views/exam_templates/_create_new_template.html.erb

@@ -8,7 +8,7 @@
       <%= f.label :file_io, t('exam_templates.create.upload'), class: "required" %>
       <%= f.file_field :file_io, required: true, accept: 'application/pdf' %>
       <%= f.label :name, ExamTemplate.human_attribute_name('name') %>
-      <%= f.text_field :name %>
+      <%= f.text_field :name, maxlength: 20 %>
     </div>
     <section class='dialog-actions'>
       <%= f.submit t(:save),

app/views/exam_templates/_form.html.erb

@@ -8,7 +8,7 @@
   <div class='exam-template-section'>
     <div class='inline-labels'>
       <%= f.label :name, ExamTemplate.human_attribute_name('name') %>
-      <%= f.text_field :name %>
+      <%= f.text_field :name, maxlength: 20 %>
       <span class="label">
         <%= t('key_pairs.file') %>
       </span>

config/locales/models/exam_templates/en.yml

@@ -8,6 +8,12 @@ en:
         name: Name
         num_pages: pages
         template_divisions: Template Divisions
+    errors:
+      models:
+        exam_template:
+          attributes:
+            name:
+              too_long: "must be at most %{count} characters"
     models:
       exam_template:
         one: Exam Template