如何使用Rails查询获取区分大小写的数据

Question

Assuming there is a community who has both "apple" and "APPLE" tags.

Then if I execute this with the param "apple"

@communities = Community.joins(taggings: :tag).where(tags: { name: params[:tag] })

In result page, 2 sets of the same community come appears.
It's probably because it's fetching with the params[:tag] for both upper case and lower case.

How can I strict this and make it not like search? I want case-sensitive and complete match.

Answer 1

尝试将属性名称包含在二进制文件中。

 @communities = Community.joins(taggings: :tag).where(['binary(tags.name) = ?', params[:tag]])