fix

app/services/project_packages/save_service.rb

@@ -17,6 +17,11 @@ class ProjectPackages::SaveService
 
     raise Error, '竞标截止时间不能小于当前时间' if params[:deadline_at].present? && params[:deadline_at].to_time < Time.now
 
+    if params[:min_price].blank? && params[:max_price].present?
+      params[:min_price] = params[:max_price]
+      params[:max_price] = nil
+    end
+
     ActiveRecord::Base.transaction do
       package.assign_attributes(params)
       package.save!