Added template select to the pages admin form (#5952) [deploy]

app/models/page.rb

@@ -1,8 +1,10 @@
 class Page < ApplicationRecord
+  TEMPLATE_OPTIONS = %w[contained full_within_layout full_page].freeze
+
   validates :title, presence: true
   validates :description, presence: true
   validates :slug, presence: true, format: /\A[0-9a-z\-_]*\z/
-  validates :template, inclusion: { in: %w[contained full_within_layout full_page] }
+  validates :template, inclusion: { in: TEMPLATE_OPTIONS }
   validate :body_present
   validate :unique_slug_including_users_and_orgs, if: :slug_changed?
 

app/views/internal/pages/_form.html.erb

@@ -21,6 +21,11 @@
         <%= form.label :description %>
         <%= form.text_field :description, class: "form-control" %>
       </div>
+      <div class="form-group">
+        <%= form.label :template %>
+        <%= form.select :template, Page::TEMPLATE_OPTIONS, class: "form-control" %>
+        <p>(Determines the way page's body will be embedded in the layout)</p>
+      </div>
       <div class="form-group">
         <%= form.label :is_top_level_path %>
         <%= form.check_box :is_top_level_path %>