Q:

Validate a string in rails?

How can I validate if something is a string? Is it something along the lines of:
validates :title, format: string 

A:

I've discovered that in order to validate that the data I am inputting contains only letters (I guess a string in this instance), I can use the following code, which validates that the format of the title is all letters, using Regex (the stuff between the //). 
validates :title, format: {with: /[a-zA-Z]/}

