Expose dossier PDF export as IO

Co-authored-by: Christophe Robillard <christophe.robillard@beta.gouv.fr>

app/models/dossier.rb

@@ -69,7 +69,6 @@ class Dossier < ApplicationRecord
   has_many :attestations, dependent: :destroy
 
   has_one_attached :justificatif_motivation
-  has_one_attached :pdf_export_for_instructeur
 
   has_many :champs, -> { root.public_ordered }, inverse_of: false, dependent: :destroy
   has_many :champs_private, -> { root.private_ordered }, class_name: 'Champ', inverse_of: false, dependent: :destroy

app/services/pieces_justificatives_service.rb

@@ -49,6 +49,30 @@ class PiecesJustificativesService
     end
   end
 
+  class FakeAttachment < Hashie::Dash
+    property :filename
+    property :name
+    property :file
+    property :id
+    property :created_at
+
+    def download
+      file
+    end
+
+    def read(*args)
+      file.read(*args)
+    end
+
+    def close
+      file.close
+    end
+
+    def attached?
+      true
+    end
+  end
+
   def self.generate_dossier_export(dossier)
     pdf = ApplicationController
       .render(template: 'dossiers/show', formats: [:pdf],
@@ -56,10 +80,14 @@ class PiecesJustificativesService
                 include_infos_administration: true,
                 dossier: dossier
               })
-    ActiveRecord::Base.no_touching do
-      dossier.pdf_export_for_instructeur.attach(io: StringIO.open(pdf), filename: "export-#{dossier.id}.pdf", content_type: 'application/pdf')
-    end
-    dossier.pdf_export_for_instructeur
+
+    FakeAttachment.new(
+      file: StringIO.new(pdf),
+      filename: "export-#{dossier.id}.pdf",
+      name: 'pdf_export_for_instructeur',
+      id: dossier.id,
+      created_at: dossier.updated_at
+    )
   end
 
   private

spec/factories/dossier.rb

@@ -201,15 +201,6 @@ FactoryBot.define do
       end
     end
 
-    trait :with_pdf_export do
-      after(:create) do |dossier, _evaluator|
-        dossier.pdf_export_for_instructeur.attach(
-          io: StringIO.new('Hello World'),
-          filename: 'export.pdf'
-        )
-      end
-    end
-
     trait :with_justificatif do
       after(:create) do |dossier, _evaluator|
         dossier.justificatif_motivation.attach(

spec/lib/active_storage/downloadable_file_spec.rb

@@ -1,12 +1,12 @@
 describe ActiveStorage::DownloadableFile do
-  let(:dossier) { create(:dossier, :en_construction, :with_pdf_export) }
+  let(:dossier) { create(:dossier, :en_construction) }
 
   subject(:list) { ActiveStorage::DownloadableFile.create_list_from_dossier(dossier) }
 
   describe 'create_list_from_dossier' do
     context 'when no piece_justificative is present' do
       it { expect(list.length).to eq 1 }
-      it { expect(list.first[0].record_type).to eq "Dossier" }
+      it { expect(list.first[0].name).to eq "pdf_export_for_instructeur" }
     end
 
     context 'when there is a piece_justificative' do

spec/services/pieces_justificatives_service_spec.rb

@@ -49,7 +49,6 @@ describe PiecesJustificativesService do
     subject { PiecesJustificativesService.generate_dossier_export(dossier) }
     it "generates pdf export for instructeur" do
       subject
-      expect(dossier.pdf_export_for_instructeur).to be_attached
     end
 
     it "doesn't update dossier" do