fix: dossier projection for json column

app/services/dossier_projection_service.rb

@@ -207,7 +207,7 @@ class DossierProjectionService
         type_de_champ = stable_ids_and_types_de_champ_by_dossier_ids.fetch(champ.dossier_id, {})[champ.stable_id]
         if type_de_champ.present? && type_de_champ.type_champ == champ.last_write_type_champ
           if column.is_a?(Columns::JSONPathColumn)
-            column.get_value(champ)
+            column.value(champ)
           else
             type_de_champ.champ_value(champ)
           end

spec/services/dossier_projection_service_spec.rb

@@ -238,6 +238,18 @@ describe DossierProjectionService do
         end
       end
 
+      context 'for a json column' do
+        let(:procedure) { create(:procedure, types_de_champ_public: [{ type: :siret, libelle: 'siret' }]) }
+        let(:dossier) { create(:dossier, procedure:) }
+        let(:label) { "siret – département" }
+
+        before do
+          dossier.project_champs_public.first.update(value_json: { 'departement_code': '38' })
+        end
+
+        it { is_expected.to eq('38') }
+      end
+
       context 'for dossier corrections table' do
         let(:table) { 'dossier_corrections' }
         let(:column) { 'resolved_at' }