ruby中带多行字符串的空格

我有一个多行字符串的空白问题

我的代码中有类似的东西，我正在生成一些SQL

def generate_sql
   <<-EOQ
      UPDATE page
         SET view_count = 10;
   EOQ
end

我可以

    def generate_sql
<<-EOQ
UPDATE page
   SET view_count = 10;
EOQ
    end

但是我的代码缩进都搞砸了，我真的不想这样

"       UPDATE page\n          SET view_count = 10;\n"

关于如何最好地实现我所追求的目标，有什么建议吗？

有这样的库供您使用

require 'dedent'

def generate_sql
   <<-EOQ.dedent
      UPDATE page
         SET view_count = 10;
   EOQ
end

---

像这样的事情应该可以做到：

def generate_sql
  <<-EOQ.gsub("\n", " ").strip
    UPDATE page
      SET ...
  EOQ
end

def生成\u sql
这会占用更多的空间（可能不太美观），但效果很好：

def generate_sql
   text = <<-EOQ
      UPDATE page
         SET view_count = 10;
   EOQ
   text.gsub(/^#{text.match(/^\s*/)[0]}/, '')
end

Ruby 2.3.0很好地解决了这个问题。请注意示例之间波浪线/连字符的差异

hyphen_heredoc = <<-MULTILINE_STRING
                    One line
                    Second line
                      Indented two spaces
                    MULTILINE_STRING

squiggly_heredoc = <<~MULTILINE_STRING_WITH_TILDE
                      One line
                      Second line
                        Indented two spaces
                      MULTILINE_STRING_WITH_TILDE

2.3.0 :001 > puts hyphen_heredoc
                      One line
                      Second line
                        Indented two spaces
2.3.0 :002 > puts squiggly_heredoc
One line
Second line
  Indented two spaces

hyphen\u herdeoc=我没说它不会呈现给用户
def generate_sql
   text = <<-EOQ
      UPDATE page
         SET view_count = 10;
   EOQ
   text.gsub(/^#{text.match(/^\s*/)[0]}/, '')
end

"UPDATE page\n   SET view_count = 10;\n"

hyphen_heredoc = <<-MULTILINE_STRING
                    One line
                    Second line
                      Indented two spaces
                    MULTILINE_STRING

squiggly_heredoc = <<~MULTILINE_STRING_WITH_TILDE
                      One line
                      Second line
                        Indented two spaces
                      MULTILINE_STRING_WITH_TILDE

2.3.0 :001 > puts hyphen_heredoc
                      One line
                      Second line
                        Indented two spaces
2.3.0 :002 > puts squiggly_heredoc
One line
Second line
  Indented two spaces