What's wrong with my scope, ruby on rails?

Question

 scope :between, -> (sender_id,recipient_id) do
    where(“(conversations.sender_id = ? AND conversations.recipient_id = ? ) OR (conversations.sender_id = ? AND conversations.recipient_id =?)”, sender_id, recipient_id, recipient_id, sender_id)
  end

I keep getting an error that says:

warning: invalid character syntax; use ?\s

How do I fix this?

Answer 1

您的引号不是标准的引号，而是一些奇怪的utf8字符，请改用“或”。错误消息可能会误导您。某些编辑器使用的是这种格式，不适用于rails。

Answer 2

You are using angled double quotation marks ( “ and ” ) which is not a valid string delimiter for literals in Ruby. Usually this happens if you are are copying text into an editor not meant for programming like MS Word. Valid delimeters are ' and " .

You can also improve the readability greatly by using named instead of ordinal placeholders.

scope :between, -> (sender_id,recipient_id) do
  where(
    "(conversations.sender_id = :s AND conversations.recipient_id = :r ) OR (conversations.sender_id = :r AND conversations.recipient_id = :s)", 
    s: sender_id, r: recipient_id
  )
end