Add paper_trail

app/models/booth.rb

@@ -1,5 +1,6 @@
 class Booth < ActiveRecord::Base
   include ActiveRecord::Transitions
+  has_paper_trail ignore: [:updated_at], meta: { conference_id: :conference_id }
 
   belongs_to :conference
   has_many :booth_requests, dependent: :destroy

app/views/admin/booths/_form.html.haml

@@ -11,8 +11,8 @@
       = f.input :reasoning, input_html: { rows: 5, data: { provide: 'markdown-editable' } }, required: true,
         label: 'How it fits the conference'
       = f.input :submitter_relationship, input_html: { rows: 5, data: { provide: 'markdown-editable' } }, required: true,
-        label: 'Your personal relationship with the organization you are applying for',
-        hint: 'e.g. employee, member of the open source community etc'
+        label: 'Submitter\'s relation',
+        hint: 'e.g. employee, comunity manager, etc'
       = f.input :website_url
       = responsibles_selector_input f
       = image_tag f.object.picture.thumb.url if f.object.picture?

app/views/admin/booths/index.html.haml

@@ -33,7 +33,8 @@
             %td
               = booth.id
             %td
-              = image_tag(booth.picture.thumb.url, width: '20%')
+              - if booth.logo_link
+                = image_tag(booth.picture.thumb.url, width: '20%')
             %td
               = link_to booth.title, admin_conference_booth_path(@conference.short_title, booth)
             %td

app/views/admin/versions/_object_desc_and_link.html.haml

@@ -80,6 +80,12 @@
   = link_if_alive version, 'contact details',
           edit_admin_conference_contact_path(conference_id: Conference.find(version.conference_id).short_title)
 
+- when 'Booth'
+  = 'booth'
+  - booth = current_or_last_object_state(version.item_type, version.item_id)
+  = link_if_alive version, booth.title,
+          admin_conference_booth_path(conference_id: Conference.find(version.conference_id).short_title, id: version.item_id )
+
 - when 'Program'
   = link_if_alive version, 'program',
           admin_conference_program_path(conference_id: Conference.find(version.conference_id).short_title)