Object.merge 在 SQL 查询中创建 AND - 什么方法创建 OR？

Question

以下代码使用合并生成以下 SQL。我已经用粗体标出了要更改的运算符。

   Micropost.from_users_followed_by(self).merge(
    Micropost.direct_replies_to(self))

SELECT "microposts".* FROM "microposts" WHERE "microposts"."reply_to" = 'example-1' AND (user_id IN (SELECT follow_id FROM 关系 WHERE follower_id = 2) AND user_id = 2) ORDER BY microposts.created_at DESC

什么方法会在两者之间产生 OR 运算符？即：

SELECT "microposts".* FROM "microposts" WHERE "microposts"."reply_to" = 'example-1' OR (user_id IN (SELECT follow_id FROM 关系 WHERE follower_id = 2) AND user_id = 2) ORDER BY microposts.created_at DESC

Answer 1

对一列的值进行 OR 运算符，您可以将数组传递给 Where 子句，并使用 ActiveRecord 使用 IN(value1,value2)：

一栏 Micropost.where(:reply_to => ["value1", "value2"])

更多专栏 Micropost.where("reply_to = ? or follower_id = ?", 'example-1', 2)

或者试试这个

Micropost.where("(reply_to = 'example-1') or (another_condition))