fix error

temp_file/app/models/concern/member_clean_cache.rb

@@ -0,0 +1,19 @@
+ module MemberCleanCache
+  extend ActiveSupport::Concern
+
+  included do
+    def destroy_cache
+      if self.class==Page
+        MemberIndexCache.where(page_id: self.id).destroy_all
+      else
+        MemberIndexCache.all.destroy_all
+      end
+    end
+    after_save do
+      self.destroy_cache
+    end
+    before_destroy do
+      self.destroy_cache
+    end
+  end
+end