如何逃避Ruby字符串插值？

Question

鉴于此代码:

has_many :foos, :finder_sql = <<-SQL
  select * from foos where bars = #{id}
SQL

该#{id}部分被过早插值.

我怎么逃避它？

Answer 1

在分隔符周围加上单引号:

has_many :foos, :finder_sql = <<-'SQL'
  select * from foos where bars = #{id}
SQL