edit input value before saving in Rails -

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hi have simple input field url user:

<%= f.text_field :url, :value=>"#{@url_website}" %>

i process input check if put http:// before it, , if not, add manually. run function on before saving? how done?

thanks!

well should put before_save in model format text, if model this

before_save :format_url  def format_url     #put important here end

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