新增：用户反馈意见后台管理逻辑

app/controllers/admins/feedbacks_controller.rb

@@ -0,0 +1,49 @@
+class Admins::FeedbacksController < Admins::BaseController
+  before_action :get_feedback, only: [:new_history, :create_history, :destroy]
+
+  def index 
+    sort_by = Feedback.column_names.include?(params[:sort_by]) ? params[:sort_by] : 'created_at'
+    sort_direction = %w(desc asc).include?(params[:sort_direction]) ? params[:sort_direction] : 'desc'
+    feedbacks = Feedback.order("#{sort_by} #{sort_direction}")
+    @feedbacks = paginate(feedbacks)
+  end
+
+  def destroy 
+    if @feedback.destroy 
+      redirect_to admins_feedbacks_path 
+      flash[:success] = "反馈意见删除成功"
+    else 
+      redirect_to admins_feedbacks_path 
+      flash[:danger] = "反馈意见删除失败"
+    end
+  end
+
+  def new_history 
+    @feedback_message_history = FeedbackMessageHistory.new
+  end
+
+  def create_history 
+    @feedback_message_history = @feedback.feedback_message_histories.new(feedback_message_history_params)
+    @feedback_message_history.user = current_user
+    if @feedback_message_history.save 
+      redirect_to admins_feedbacks_path 
+      flash[:success] = "发送通知成功"
+    else 
+      redirect_to admins_feedbacks_path 
+      flash[:danger] = "发送通知失败"
+    end
+  end
+
+  private  
+  def feedback_params 
+    params.require(:feedback).permit!
+  end
+
+  def feedback_message_history_params 
+    params.require(:feedback_message_history).permit(:title, :content)
+  end
+
+  def get_feedback 
+    @feedback = Feedback.find_by_id(params[:id])
+  end
+end