refactor(attachment): simplify find champ

app/components/attachment/edit_component.rb

@@ -58,7 +58,7 @@ def attachment_path(**args)
 
   def destroy_attachment_path
     if champ.present?
-      attachment_path(dossier_id: champ&.dossier_id, stable_id: champ&.stable_id, row_id: champ&.row_id)
+      attachment_path
     else
       attachment_path(auto_attach_url: @auto_attach_url, view_as: @view_as, direct_upload: @direct_upload)
     end

app/controllers/attachments_controller.rb

@@ -20,15 +20,16 @@ def show
 
   def destroy
     @attachment = @blob.attachments.find(params[:id])
-    @attachment.purge_later
-    flash.notice = 'La pièce jointe a bien été supprimée.'
 
-    if params[:dossier_id]
-      @champ = find_champ
+    if champ?
+      @attachment = champ.piece_justificative_file.find { _1.blob.id == @blob.id }
     else
       @attachment_options = attachment_options
     end
 
+    @attachment.purge_later
+    flash.notice = 'La pièce jointe a bien été supprimée.'
+
     respond_to do |format|
       format.turbo_stream
       format.html { redirect_back(fallback_location: root_url) }
@@ -37,14 +38,23 @@ def destroy
 
   private
 
-  def find_champ
-    dossier = policy_scope(Dossier).includes(:champs).find(params[:dossier_id])
-    dossier.champs.find_by(stable_id: params[:stable_id], row_id: params[:row_id])
+  def record
+    @attachment.record
+  end
+
+  def champ?
+    record.is_a?(Champ)
+  end
+
+  def champ
+    @champ ||= if champ?
+      record.dossier.champ_for_update(record.type_de_champ, row_id: record.row_id, updated_by: current_user.email)
+    end
   end
 
   def attachment_options
     {
-      attached_file: @attachment.record.public_send(@attachment.name),
+      attached_file: record.public_send(@attachment.name),
       view_as: params[:view_as]&.to_sym,
       direct_upload: params[:direct_upload] == "true",
       auto_attach_url: params[:direct_upload] == "true" ? params[:auto_attach_url] : nil