Add migration service and task

app/jobs/tmp_dossiers_migrate_revisions_job.rb

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+class TmpDossiersMigrateRevisionsJob < ApplicationJob
+  def perform(except)
+    dossiers = Dossier.with_discarded.where(revision_id: nil)
+
+    dossiers.where
+      .not(id: except)
+      .includes(procedure: [:draft_revision, :published_revision])
+      .limit(2000)
+      .find_each do |dossier|
+        if dossier.procedure.present?
+          dossier.revision = dossier.procedure.active_revision
+          dossier.save!(validate: false)
+        else
+          except << dossier.id
+        end
+      end
+
+    if dossiers.where.not(id: except).exists?
+      TmpDossiersMigrateRevisionsJob.perform_later(except)
+    end
+  end
+end

app/services/revisions_migration.rb

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+class RevisionsMigration
+  def self.add_revisions(procedure)
+    if procedure.draft_revision.present?
+      return false
+    end
+
+    procedure.draft_revision = procedure.revisions.create
+    procedure.save!(validate: false)
+
+    add_types_de_champs_to_revision(procedure, :types_de_champ)
+    add_types_de_champs_to_revision(procedure, :types_de_champ_private)
+
+    if procedure.publiee?
+      published_revision = procedure.draft_revision
+
+      procedure.draft_revision = procedure.create_new_revision
+      procedure.published_revision = published_revision
+      procedure.save!(validate: false)
+    elsif procedure.close? || procedure.depubliee?
+      procedure.draft_revision = procedure.create_new_revision
+      procedure.save!(validate: false)
+    end
+
+    true
+  end
+
+  def self.add_types_de_champs_to_revision(procedure, types_de_champ_scope)
+    types_de_champ = procedure.send(types_de_champ_scope)
+    types_de_champ.where(revision_id: nil).update_all(revision_id: procedure.draft_revision.id)
+
+    types_de_champ.each.with_index do |type_de_champ, index|
+      type_de_champ.types_de_champ.where(revision_id: nil).update_all(revision_id: procedure.draft_revision.id)
+      procedure.draft_revision.send(:"revision_#{types_de_champ_scope}").create!(
+        type_de_champ: type_de_champ,
+        position: index
+      )
+    end
+  end
+end

lib/tasks/deployment/20200625113026_migrate_revisions.rake

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+namespace :after_party do
+  desc 'Deployment task: migrate_revisions'
+  task migrate_revisions: :environment do
+    puts "Running deploy task 'migrate_revisions'"
+
+    procedures = Procedure.with_discarded.where(draft_revision_id: nil)
+    progress = ProgressReport.new(procedures.count)
+
+    puts "Processing procedures"
+    procedures.find_each do |procedure|
+      RevisionsMigration.add_revisions(procedure)
+      progress.inc
+    end
+    progress.finish
+
+    TmpDossiersMigrateRevisionsJob.perform_later([])
+
+    # Update task as completed.  If you remove the line below, the task will
+    # run with every deploy (or every time you call after_party:run).
+    AfterParty::TaskRecord.create version: '20200625113026'
+  end
+end