create custom validation

rubyonrails-talk
1

hi, i created a validation to prevent users to write text uppercase in my fields, i have writing the code on my class model like this:

2

Try this

def validates_on_yours_method_name size_letters = field.scan(/\w/).size size_invalid = field.scan(/[A-Z]/).size if size_invalid > 0 if (size_letters / size_invalid) < 4 and size_letters > 10 errors.add( field, I18n.t('activerecord.errors.

messages.uppercase’))

    write_attribute(field, field.downcase)

  end

end

end

3

Do you really need to "prevent" them, or can you just downcase it and be done? In any case, wouldn't the easiest check be something like

  unless ( field.downcase == field ) errors.add( ... )

?

4

i have resolved with this:

  #prevent users to write text uppercase, and reset field text to lowercase   validates_each :title, :description do |model, attr, value|     size_letters = value.scan(/\w/).size     size_invalid = value.scan(/[A-Z]/).size     if size_invalid > 0       if (size_letters / size_invalid) < 4 and size_letters > 10         model.errors.add( attr, I18n.t('activerecord.errors.messages.uppercase'))         model.write_attribute(attr, value.downcase)       end     end   end

for Hassan Schroeder: i want the user write in uppercae only certain letters( itials of names, letter after points, etc..). with my solution i concur the user to write in the text the 25% of letters uppercase.

thanks to all.