Rails form_for additional field -

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i need user enter url within form. however, url not column in database. error following form.

i have form create video (new.html.haml)

= form_for @video |f|   .field   = f.label :title   = f.text_field :title .field   = f.label :description   = f.text_area :description .field   = f.label :url   = f.text_field :url .field   provider   %br   = radio_button :video, :provider, 'vimeo'   = f.label :provider, 'vimeo', :value => 'vimeo'   %br   = radio_button :video, :provider, 'youtube'    = f.label :provider, 'youtube', :value => 'youtube' %br .actions   = f.submit "add video"

rails complains url not column in url unknown method or variable.

what want do

basically, need url video user adding,along title of video, description , provider.

all fields have column in databse, url doesn't.

i need format url , call methods on it. create new output storin databse.

so url, provider_video_id, thumb databse columns.

**how can receive user url in form without dedicated database column?

you need use virtual attribute.

put in model this:

def url=(url)   @url = url end  def url   @url end

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