修改主版本库丢失的404问题

app/controllers/repositories_controller.rb

@@ -484,7 +484,18 @@ update
     if params[:repository_id].present?
       @repository = @project.repositories.find_by_identifier_param(params[:repository_id])
     else
-      @repository = @project.repository
+      # 多版本库，如果一个版本库为空则去下一个
+      rep_count = @project.repositories.count
+      if @project.repository.nil?
+        for i in 0..rep_count
+          unless @project.repositories[i].nil?
+            @repository = @project.repositories[i]
+            break
+          end
+        end
+      else
+        @repository = @project.repository
+      end
     end
     (render_404; return false) unless @repository
     @path = params[:path].is_a?(Array) ? params[:path].join('/') : params[:path].to_s