Rails：防止will_paginate调用ActiveRelation的#count [英] Rails: Prevent will_paginate from calling #count of ActiveRelation

问题描述

当我通过 will_paginate 一个ActiveRelation时，它将始终调用其#count方法并访问数据库以查找项目总数。但是此操作需要时间，并且我已经缓存了总数并且准备就绪。我可以将这个预先计算的计数传递给 will_paginate 并阻止它访问数据库吗？

When I pass will_paginate an ActiveRelation, it always calls its #count method and hits the database to find out the total number of items. But this operation takes time and I have the total number already cached and ready. Can I pass this pre-calculated count to will_paginate and stop it from hitting the database?

我尝试了：count 选项，但作为选项传递给ActiveRecord：

I tried the :count option, but it is passed to ActiveRecord as an option:

active_relation.paginate(page: 2, per_page: 100, count: total_count)

谢谢！ ：）

推荐答案

通过：total_entries 传递缓存的计数可解决此问题：

Passing the cached count with :total_entries solves the problem:

active_relation.paginate(page: 2, per_page: 100, total_entries: total_count)

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