January 31, 2007
How to use an auto_complete to validate passwords
As a follow up to my previous article about using auto_completes to ensure unique filenames, I’ve put together a bit of code that does essentially the same thing except that it checks a password field to ensure that it meets certain criteria.
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# view file
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<%= text_field_with_auto_complete :user, :password %><div id=login_error></div>
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# model file
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def User < ActiveRecord::Base
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validates_length_of :password, :in=>3..20
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end
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# controller file
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def auto_complete_for_user_password
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@user = User.new(params[:user])
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@user.valid? # ensures the errors array is populated
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password_errors = @user.errors.on(‘password’)
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render :update do |page|
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page.replace_html ‘login_error’, (password_errors.empty? ? "" : password_errors)
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end
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end
This will indicate when a password does not meet the validation criteria defined in the model. You can add custom validations to check the strength of the password itself.
Filed by Kevin Olbrich at 9:04 pm under AJAX, Forms, Ruby on Rails, User Interface, auto_complete
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