[Rails] Inaproriate excaping of string in Rails

Hy, sory for bad English. I have a problem, when i enter for example
"" in text_field i'v got empty string and so on. Ho to solve this
problem and get absolutely those text that i enter in field?

I using regular expressions in text-field and when i want to get ".*"
for next eval this string i need enter """.*"""
Help!

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