diff --git a/ruby/shit.md b/ruby/shit.md
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+重复delete
+```
+unless can?(current_user, :modify_issue, @project)
+  params[:issue].delete(:assignee_id)
+  params[:issue].delete(:milestone_id)
+  params[:issue].delete(:label_list)
+  params[:issue].delete(:collaborators_ids)
+end
+```
+修改如下：
+```
+params[:issue].except!(:assignee_id, :milestone_id, :label_list, :collaborators_ids)
+```
+看起来清爽了很多