如何逃离?(问号)在Rails中查询Postgresql JSONB类型的操作符

I'm working with Rails 4.2 and Postgres 9.4 to try out the new JSONB data type. One of the JSONB columns in my database holds an array, and I want to be able to query for records where this array contains a certain value. I figured out how to do this using the new JSONB "question mark" ("contains") operator, as documented here: I'm working with Rails 4.2 and Postgres 9.4 to