Rails is a fantastic framework to develop with, but it can occasionally be unforgiving when it comes to error throwing. I was recently coding up a soft delete method in a model when Rails gave me the perplexing error: “Undefined Method `stringify_keys’”. I wasn’t calling stringify_keys anywhere in my method nor was it anywhere in my model. A grep through the app directory of the codebase came up empty as well, and I was stumped.
As it turns out, the error was being thrown from deeper in the code than in my application, but it was, in fact, my code that was in error.
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The error lies in the arguments that are being passed into update_attributes. update_attributes expects one argument, a hash, whereas, I am providing two arguments, a key and a value. The error is exactly four characters long. The corrected code is below.
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h/t to Stack Overflow