查询以“ The”开头的记录，并将“ The”移至字符串的末尾，并在Rails Postgres中加入逗号

Question

I have a data set that I'm trying to sort alphabetically. A lot of records have a "the" at the beginning. I'd like to query for records with a "The" (ie. The Irish Bar) and move the "The" to the end of the string and join with a comma (ie, "Irish Bar").

I feel like this should be a Regular Expression to query and then updating. It seems a bit hacky, there must be an elegant solution as it's not an uncommon requirement.

regexp = \w+[The]  (?????)
records = Record.where("title LIKE ?", regexp)

records.each do |record|
  record.title = "title witthou the the + ", The"
  record.save
end

Answer 1

You can use this to find records beginning with "the" (edited for case-insensitive):

records = Record.where("lower(title) LIKE :prefix", prefix: "#{the}%")

Then use sub to replace the "the", then update the records:

records.each do |r|
  r.title = r.title.sub(/the/i, "")
  r.title = "#{r.title}, The"
  r.save
end