Use regex string stored in mysql field for Rails project - mysql

Question

In order to clean up code for my Rails project, I moved all regex strings to MySQL. How can I add the string located in MySQL fields to my match method? Here's an example of what I'm trying to do:
foobar = []
regular_ex = StringDb.pluck(:id, :regex)
# :regex is a column that stores regex strings, ie. '/[a-c]|[1,2,3]/'
regular_ex.each do |exp|
if foo.match(exp[1])
foobar << exp[0]
Please let me know if my question is not clear.
Thanks in advance!

Answer 1

You can create new regex from string like this
Regexp.new str
Or using the regex interpolation
%r{#{regex_string}}
That would mean that you would do something similiar to this
foobar = []
regular_ex = StringDb.pluck(:id, :regex)
# :regex is a column that stores regex strings, ie. '/[a-c]|[1,2,3]/'
regular_ex.each do |exp|
if Regexp.new(exp).match("stringToMatch")
# do something
Please note two things.
In order for this to work you should remove the starting and trailing slash from the regex in database.
Store '[a-c]|[1,2,3]' instead of '/[a-c]|[1,2,3]/'.
I'm not really sure why you decided to store all regexes in the database but it does not sound like a good idea.