fix(graphql): do not crash if attestation is nil

app/graphql/types/dossier_type.rb

@@ -143,8 +143,10 @@ module Types
     end
 
     def attestation
-      if object.termine? && object.procedure.attestation_template&.activated?
-        Loaders::Association.for(object.class, attestation: { pdf_attachment: :blob }).load(object).then(&:pdf)
+      if object.attestation_activated?
+        Loaders::Association.for(object.class, attestation: { pdf_attachment: :blob })
+          .load(object)
+          .then { |attestation| attestation&.pdf }
       end
     end
 

app/models/dossier.rb

@@ -779,6 +779,10 @@ class Dossier < ApplicationRecord
     end
   end
 
+  def attestation_activated?
+    termine? && procedure.attestation_template&.activated?
+  end
+
   def after_passer_en_construction
     self.conservation_extension = 0.days
     self.depose_at = self.en_construction_at = self.traitements

spec/graphql/dossier_spec.rb

@@ -0,0 +1,45 @@
+RSpec.describe Types::DossierType, type: :graphql do
+  let(:query) { DOSSIER_QUERY }
+  let(:context) { { internal_use: true } }
+  let(:variables) { {} }
+
+  subject { API::V2::Schema.execute(query, variables: variables, context: context) }
+
+  let(:data) { subject['data'].deep_symbolize_keys }
+  let(:errors) { subject['errors'].deep_symbolize_keys }
+
+  describe 'dossier with attestation' do
+    let(:dossier) { create(:dossier, :accepte, :with_attestation) }
+    let(:query) { DOSSIER_WITH_ATTESTATION_QUERY }
+    let(:variables) { { number: dossier.id } }
+
+    it { expect(data[:dossier][:attestation]).not_to be_nil }
+
+    context 'when attestation is nil' do
+      before do
+        dossier.update(attestation: nil)
+      end
+
+      it { expect(data[:dossier][:attestation]).to be_nil }
+    end
+  end
+
+  DOSSIER_QUERY = <<-GRAPHQL
+  query($number: Int!) {
+    dossier(number: $number) {
+      id
+      number
+    }
+  }
+  GRAPHQL
+
+  DOSSIER_WITH_ATTESTATION_QUERY = <<-GRAPHQL
+  query($number: Int!) {
+    dossier(number: $number) {
+      attestation {
+        url
+      }
+    }
+  }
+  GRAPHQL
+end