Remove soft removals related code

This removes all usage of soft removals except for the "pending delete"
system implemented for projects. This in turn simplifies all the query
plans of the models that used soft removals. Since we don't really use
soft removals for anything useful there's no point in keeping it around.

This _does_ mean that hard removals of issues (which only admins can do
if I'm not mistaken) can influence the "iid" values, but that code is
broken to begin with. More on this (and how to fix it) can be found in
https://gitlab.com/gitlab-org/gitlab-ce/issues/31114.

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/37447

10 files changed, 13 insertions, 22 deletions

diff --git a/app/models/ci/pipeline_schedule.rb b/app/models/ci/pipeline_schedule.rb
index 10ead6b6d3b..b6abc3d7681 100644
--- a/app/models/ci/pipeline_schedule.rb
+++ b/app/models/ci/pipeline_schedule.rb
@@ -2,8 +2,9 @@ module Ci
   class PipelineSchedule < ActiveRecord::Base
     extend Gitlab::Ci::Model
     include Importable
+    include IgnorableColumn
 
-    acts_as_paranoid
+    ignore_column :deleted_at
 
     belongs_to :project
     belongs_to :owner, class_name: 'User'
diff --git a/app/models/ci/trigger.rb b/app/models/ci/trigger.rb
index b5290bcaf53..aa065e33739 100644
--- a/app/models/ci/trigger.rb
+++ b/app/models/ci/trigger.rb
@@ -1,8 +1,9 @@
 module Ci
   class Trigger < ActiveRecord::Base
     extend Gitlab::Ci::Model
+    include IgnorableColumn
 
-    acts_as_paranoid
+    ignore_column :deleted_at
 
     belongs_to :project
     belongs_to :owner, class_name: "User"
diff --git a/app/models/concerns/internal_id.rb b/app/models/concerns/internal_id.rb
index a3d0ac8d862..01079fb8bd6 100644
--- a/app/models/concerns/internal_id.rb
+++ b/app/models/concerns/internal_id.rb
@@ -10,7 +10,6 @@ module InternalId
     if iid.blank?
       parent = project || group
       records = parent.public_send(self.class.name.tableize) # rubocop:disable GitlabSecurity/PublicSend
-      records = records.with_deleted if self.paranoid?
       max_iid = records.maximum(:iid)
 
       self.iid = max_iid.to_i + 1
diff --git a/app/models/issue.rb b/app/models/issue.rb
index ad4a3c737ff..93628b456f2 100644
--- a/app/models/issue.rb
+++ b/app/models/issue.rb
@@ -12,7 +12,7 @@ class Issue < ActiveRecord::Base
   include ThrottledTouch
   include IgnorableColumn
 
-  ignore_column :assignee_id, :branch_name
+  ignore_column :assignee_id, :branch_name, :deleted_at
 
   DueDateStruct = Struct.new(:title, :name).freeze
   NoDueDate     = DueDateStruct.new('No Due Date', '0').freeze
@@ -78,8 +78,6 @@ class Issue < ActiveRecord::Base
     end
   end
 
-  acts_as_paranoid
-
   class << self
     alias_method :in_parents, :in_projects
   end
diff --git a/app/models/merge_request.rb b/app/models/merge_request.rb
index ef58816937c..8fdeddf1ed1 100644
--- a/app/models/merge_request.rb
+++ b/app/models/merge_request.rb
@@ -11,7 +11,8 @@ class MergeRequest < ActiveRecord::Base
   include Gitlab::Utils::StrongMemoize
 
   ignore_column :locked_at,
-                :ref_fetched
+                :ref_fetched,
+                :deleted_at
 
   belongs_to :target_project, class_name: "Project"
   belongs_to :source_project, class_name: "Project"
@@ -150,8 +151,6 @@ class MergeRequest < ActiveRecord::Base
 
   after_save :keep_around_commit
 
-  acts_as_paranoid
-
   def self.reference_prefix
     '!'
   end
diff --git a/app/models/namespace.rb b/app/models/namespace.rb
index bdcc9159d26..37a7417cafc 100644
--- a/app/models/namespace.rb
+++ b/app/models/namespace.rb
@@ -1,6 +1,4 @@
 class Namespace < ActiveRecord::Base
-  acts_as_paranoid without_default_scope: true
-
   include CacheMarkdownField
   include Sortable
   include Gitlab::ShellAdapter
@@ -10,6 +8,9 @@ class Namespace < ActiveRecord::Base
   include AfterCommitQueue
   include Storage::LegacyNamespace
   include Gitlab::SQL::Pattern
+  include IgnorableColumn
+
+  ignore_column :deleted_at
 
   # Prevent users from creating unreasonably deep level of nesting.
   # The number 20 was taken based on maximum nesting level of
@@ -221,12 +222,6 @@ class Namespace < ActiveRecord::Base
     has_parent?
   end
 
-  def soft_delete_without_removing_associations
-    # We can't use paranoia's `#destroy` since this will hard-delete projects.
-    # Project uses `pending_delete` instead of the acts_as_paranoia gem.
-    self.deleted_at = Time.now
-  end
-
   private
 
   def refresh_access_of_projects_invited_groups
diff --git a/app/serializers/issue_entity.rb b/app/serializers/issue_entity.rb
index 0bdd4d7a272..b5e2334b6e3 100644
--- a/app/serializers/issue_entity.rb
+++ b/app/serializers/issue_entity.rb
@@ -6,7 +6,6 @@ class IssueEntity < IssuableEntity
   expose :updated_by_id
   expose :created_at
   expose :updated_at
-  expose :deleted_at
   expose :milestone, using: API::Entities::Milestone
   expose :labels, using: LabelEntity
   expose :lock_version
diff --git a/app/services/groups/destroy_service.rb b/app/services/groups/destroy_service.rb
index e3f9d9ee95d..58e88688dfa 100644
--- a/app/services/groups/destroy_service.rb
+++ b/app/services/groups/destroy_service.rb
@@ -1,7 +1,6 @@
 module Groups
   class DestroyService < Groups::BaseService
     def async_execute
-      group.soft_delete_without_removing_associations
       job_id = GroupDestroyWorker.perform_async(group.id, current_user.id)
       Rails.logger.info("User #{current_user.id} scheduled a deletion of group ID #{group.id} with job ID #{job_id}")
     end
@@ -23,7 +22,7 @@ module Groups
 
       group.chat_team&.remove_mattermost_team(current_user)
 
-      group.really_destroy!
+      group.destroy
     end
   end
 end
diff --git a/app/services/users/destroy_service.rb b/app/services/users/destroy_service.rb
index 00db8a2c434..b71002433d6 100644
--- a/app/services/users/destroy_service.rb
+++ b/app/services/users/destroy_service.rb
@@ -53,7 +53,7 @@ module Users
 
       # Destroy the namespace after destroying the user since certain methods may depend on the namespace existing
       user_data = user.destroy
-      namespace.really_destroy!
+      namespace.destroy
 
       user_data
     end
diff --git a/app/workers/group_destroy_worker.rb b/app/workers/group_destroy_worker.rb
index f577b310b20..509bd09dc2e 100644
--- a/app/workers/group_destroy_worker.rb
+++ b/app/workers/group_destroy_worker.rb
@@ -4,7 +4,7 @@ class GroupDestroyWorker
 
   def perform(group_id, user_id)
     begin
-      group = Group.with_deleted.find(group_id)
+      group = Group.find(group_id)
     rescue ActiveRecord::RecordNotFound
       return
     end