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I have an instance variable called @chosen_athlete in my controller. I use this variable to perform some calculations in the corresponding view. However the value of the @chosen_athlete variable should be settable by my currently logged in user. What is the proper way to set the @chosen_athlete variable and update the data in my view?
You should use a form
Take a look there : http://guides.rubyonrails.org/form_helpers.html