__iregex = searchterm在Django中不起作用

Question

I have this query:

q = MyModel.objects.filter(title__iregex=r"\y{0}\y".format(searchterm))

but once I give c++ as searchterm, i am getting this error:

Error:  invalid regular expression: quantifier operand invalid

how can I make signs like +, /, -, % passable thru regex?

Answer 1

Escape them: c\\+\\+ . Maybe escape them twice, if sth is evaluating one escaping: c\\\\+\\\\+ .

If you want to do that programmatically, use re.escape() :

import re

print re.escape('c++')

This will print

c\+\+