在Rails中查询-查询中的双引号字符串

Question

I need query like this

scope :find_email_usage, -> (id) {
    where("EXISTS ((with filter_table as (select id, jsonb_array_elements(jsonb_array_elements(filters) -> 'criteria') filter_json) select 1 from filter_table where filter_json @> '{\"mail_id\": ?}'))", id.to_s, id.to_s)

  }

But the structure has to be like '{"a":1, "b":"2"}'::jsonb @> '{"b":2}'::jsonb

How do I get the double quote in raw query using the substitution using ? in rails.

where("EXISTS ((with filter_table as (select id, jsonb_array_elements(jsonb_array_elements(filters) -> 'criteria') filter_json) select 1 from filter_table where filter_json @> '{\"mail_id\": "#{id.to_s}"))", id.to_s)

But any other ways to get the double quoted string inside raw query?

Answer 1

最简单的方法是构建一个Ruby哈希，将其转换为JSON，然后将该字符串提供给查询：

where('EXISTS ((... where filter_json @> ?::jsonb))', { 'mail_id' => id.to_s }.to_json)