带格式的范围
方法
常量
RANGE_FORMATS | = | { db: -> (start, stop) do if start && stop case start when String then "BETWEEN '#{start}' AND '#{stop}'" else "BETWEEN '#{start.to_fs(:db)}' AND '#{stop.to_fs(:db)}'" end elsif start case start when String then ">= '#{start}'" else ">= '#{start.to_fs(:db)}'" end elsif stop case stop when String then "<= '#{stop}'" else "<= '#{stop.to_fs(:db)}'" end end end } |
实例公共方法
to_fs(format = :default) 链接
将范围转换为格式化的字符串。请参阅 RANGE_FORMATS
获取预定义的格式。
此方法是 to_formatted_s
的别名。
range = (1..100) # => 1..100
range.to_s # => "1..100"
range.to_fs(:db) # => "BETWEEN '1' AND '100'"
range = (1..) # => 1..
range.to_fs(:db) # => ">= '1'"
range = (..100) # => ..100
range.to_fs(:db) # => "<= '100'"
向 to_fs
添加您自己的范围格式
您可以向 Range::RANGE_FORMATS 哈希中添加您自己的格式。使用格式名称作为哈希键和 Proc 实例。
# config/initializers/range_formats.rb
Range::RANGE_FORMATS[:short] = ->(start, stop) { "Between #{start.to_fs(:db)} and #{stop.to_fs(:db)}" }
也被称为:to_formatted_s
源代码:显示 | 在 GitHub 上
# File activesupport/lib/active_support/core_ext/range/conversions.rb, line 51 def to_fs(format = :default) if formatter = RANGE_FORMATS[format] formatter.call(self.begin, self.end) else to_s end end