Harden account deletion

* Wrap it into a transaction
* Use destroy over delete so dependent destroys get triggered
  and we thus don't fail on the foreign key constraits
* Check if a photos status message actually exists before accessing
  it
* Add missing dependent destroys

app/models/aspect.rb

@@ -8,7 +8,7 @@ class Aspect < ActiveRecord::Base
   has_many :aspect_memberships, :dependent => :destroy
   has_many :contacts, :through => :aspect_memberships
 
-  has_many :aspect_visibilities
+  has_many :aspect_visibilities, :dependent => :destroy
   has_many :posts, :through => :aspect_visibilities, :source => :shareable, :source_type => 'Post'
   has_many :photos, :through => :aspect_visibilities, :source => :shareable, :source_type => 'Photo'
 

app/models/contact.rb

@@ -11,7 +11,7 @@ class Contact < ActiveRecord::Base
   delegate :name, :diaspora_handle, :guid, :first_name,
            to: :person, prefix: true
 
-  has_many :aspect_memberships
+  has_many :aspect_memberships, :dependent => :destroy
   has_many :aspects, :through => :aspect_memberships
 
   has_many :share_visibilities, :source => :shareable, :source_type => 'Post'
@@ -51,7 +51,7 @@ class Contact < ActiveRecord::Base
     Notification.where(:target_type => "Person",
                        :target_id => person_id,
                        :recipient_id => user_id,
-                       :type => "Notifications::StartedSharing").delete_all
+                       :type => "Notifications::StartedSharing").destroy_all
   end
 
   def dispatch_request

app/models/mention.rb

@@ -22,6 +22,6 @@ class Mention < ActiveRecord::Base
   end
 
   def delete_notification
-    Notification.where(:target_type => self.class.name, :target_id => self.id).delete_all
+    Notification.where(:target_type => self.class.name, :target_id => self.id).destroy_all
   end
 end

app/models/photo.rb

@@ -51,7 +51,7 @@ class Photo < ActiveRecord::Base
   end
 
   def clear_empty_status_message
-    if self.status_message_guid && self.status_message.text_and_photos_blank?
+    if self.status_message && self.status_message.text_and_photos_blank?
       self.status_message.destroy
     else
       true

lib/account_deleter.rb

@@ -23,20 +23,22 @@ class AccountDeleter
   end
 
   def perform!
-    #person
-    delete_standard_person_associations
-    remove_conversation_visibilities
-    remove_share_visibilities_on_persons_posts
-    delete_contacts_of_me
-    tombstone_person_and_profile
-
-    if self.user
-      #user deletion methods
-      remove_share_visibilities_on_contacts_posts
-      delete_standard_user_associations
-      disassociate_invitations
-      disconnect_contacts
-      tombstone_user
+    ActiveRecord::Base.transaction do
+      #person
+      delete_standard_person_associations
+      remove_conversation_visibilities
+      remove_share_visibilities_on_persons_posts
+      delete_contacts_of_me
+      tombstone_person_and_profile
+
+      if self.user
+        #user deletion methods
+        remove_share_visibilities_on_contacts_posts
+        delete_standard_user_associations
+        disassociate_invitations
+        disconnect_contacts
+        tombstone_user
+      end
     end
   end
 
@@ -55,13 +57,13 @@ class AccountDeleter
 
   def delete_standard_user_associations
     normal_ar_user_associates_to_delete.each do |asso|
-      self.user.send(asso).each{|model| model.delete}
+      self.user.send(asso).each{|model| model.destroy }
     end
   end
 
   def delete_standard_person_associations
     normal_ar_person_associates_to_delete.each do |asso|
-      self.person.send(asso).delete_all
+      self.person.send(asso).destroy_all
     end
   end
 

lib/tasks/accounts.rake

@@ -7,9 +7,9 @@ namespace :accounts do
         account_delete.perform!
       end
       puts "OK."
+    else
+      puts "No acccount deletions to run."
     end
-
-    puts "No acccount deletions to run."
   end
 
 end

spec/lib/account_deleter_spec.rb

@@ -73,7 +73,7 @@ describe AccountDeleter do
     it 'removes all standard user associaltions' do
       @account_deletion.normal_ar_user_associates_to_delete.each do |asso|
         association_double = double
-        association_double.should_receive(:delete)
+        association_double.should_receive(:destroy)
         bob.should_receive(asso).and_return([association_double])
       end
 
@@ -88,7 +88,7 @@ describe AccountDeleter do
     it 'removes all standard person associaltions' do
       @account_deletion.normal_ar_person_associates_to_delete.each do |asso|
         association_double = double
-        association_double.should_receive(:delete_all)
+        association_double.should_receive(:destroy_all)
         bob.person.should_receive(asso).and_return(association_double)
       end